Japanese Earthquake, Tsunami, and Nuclear Reactors | Page 29 | Golden Skate

Japanese Earthquake, Tsunami, and Nuclear Reactors

Further reports from TEPCO and NHK. Today has been rather busy:

Seawater data is looking good!
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110510e8.pdf

- We have been calibrating water level gauge of the reactor of Unit 1 since May 10. -
We injected water to the spent fuel pool of Unit 2 by temporary motor pump from 1:09pm to 2:45pm, May 10th. (We added hydrazine (an antioxidant) for the period from 1:19pm to 2:35pm).

- We have suspended transferring water from the vertical shaft of Unit 2 turbine building to Centralized Radiation Waste Treatment Facility due to the construction work of changing water supply line for Unit 3 reactor to Reactor Feed Water System. We also cut a part of pipes of Reactor Feed Water System of Unit 3 on the same day. -
On May 10th, we started laying out pipes for transferring draining water of Unit 3 turbine building to Centralized Radiation Waste Treatment Facility.

- At 10:00am May 10th, we resumed transfer of Unit 6 turbine building basement water to the temporary tank.

- On May 10th, we sprayed dust inhibitor, which avoids radioactive materials from scattering, to the area of 6,000 m2 around eastern area of turbine building of Units 1 and 2 by using an unmanned crawler dump truck. We sprayed dust inhibitor to areas including nearby the solid waste storage facility (approx. 5,050m2) using the conventional method.

NHK Report on Work at Unit 1:
TEPCO starts adjusting gauges at Unit 1
Workers at the troubled Fukushima Daiichi nuclear power plant in northeast Japan have started adjusting gauges at the plant's Number 1 reactor to ensure stable cooling.

The 9 workers started the work on Tuesday morning as part of a plan to fill the reactor's containment vessel with water.The plant's operator, the Tokyo Electric Power Company, says it hopes to determine the level of water inside the vessel, which the firm plans to fill with water.

The firm installed radiation-proof mats containing lead at the site after a survey on Monday detected radiation levels of 7 to 12 millisieverts per hour nearby.

But the firm says the mats have reduced radiation by only about 10 percent, and that it must work out how to protect workers from exposure.

The firm also says the temperature of the plant's Number 3 reactor has been rising this month, and that work to pump water to cool the reactor may be insufficient.

The company says it is installing new pipes at the reactor and hopes to start pumping water through them on Thursday.
Tuesday, May 10, 2011 19:13 +0900 (JST)

NHK report on the Unit 3 Temperature Rise and Actions Taken in Consequence:
TEPCO to begin pipe work for No.3 reactor
The operator of the troubled Fukushima Daiichi nuclear power plant is to begin construction work on pipes for the No.3 reactor to make sure that all cooling water being pumped in is actually reaching the reactor.

Tokyo Electric Power Company has been pumping 9 tons of water per hour into the reactor since last Wednesday after its temperature began rising earlier this month. That was an increase from 7 tons per hour. But the temperature at the bottom of the reactor stood at 150.6 degrees Celsius as of 5 AM Tuesday, marking a rise of 34.1 degrees over the past 10 days.

The power company suspects that not all the water was reaching the reactor because some of it may have been entering a pipe that branched off. So it decided to pump water through another pipe that had been used to inject water into the reactor before. The construction work to change pipes for water injection is to begin on Tuesday afternoon. If all goes smoothly, the water will be pumped through the pipe starting on Thursday.

The water level inside a tunnel connected to the reactor was 76 centimeters from the tunnel opening on the ground surface as of 7 AM Tuesday--a 16 centimeter rise over the past 10 days. The level continues to exceed the 1 meter mark, which the utility firm has set as the benchmark to begin transferring contaminated water.

The firm plans to quickly prepare to transfer contaminated water from the No.3 reactor turbine building and the tunnel.
Tuesday, May 10, 2011 12:44 +0900 (JST)
 
This is the most interesting thing to me. The US has collaborated with the Japanese to do an aerial survey to map cesium concentrations.

Here's the picture:


10_04_v_s.jpg

(check out the map above)

Japan's Nuclear Safety Commission says a new aerial map of radioactive fallout contamination has confirmed the radiation levels in the area near the Fukushima Daiichi nuclear power plant. The commission's chairman, Haruki Madarame, told reporters on Monday that the map will reinforce the agency's system to monitor contamination and will help find ways to lower radiation levels.The Japanese Science Ministry and the US Energy Department conducted a joint aerial survey from April 6th to the 29th of the area within an 80-kilometer radius of the plant. The map shows the density of radioactive cesium in red or yellow, depending on the concentration in the soil.

The high density area lies northwest of the plant, coinciding with data collected on the ground. Madarame also said the situation at the power plant is stabilizing and that it is about time to review ways to carry out daily surveys on the ground. He said the soils could be tested fewer times but more meticulously with the aid of aerial mapping.Tuesday, May 10, 2011 07:43 +0900 (JST)

When you check out the map, you see that there are large areas that have been evacuated that probably should not have been, and others that have that perhaps should have been, that aren't.

Clearly, this kind of map is something that should be generated as soon as possible after an accident.
 
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It may not be much of interest to the members of GS, but Artistic Gymnastics World Championship is scheduled to be held in Tokyo this year too. As far as I know, FIG (Gymnastics' version of ISU) has not yet decided whether it is definitely going ahead or not (re-evaluation of the situation to take place by the end of May)

Meanwhile, the event's official website has the latest news letter on its top page, comparing the radiation dosage in Tokyo and various cities around the world. I guess there are (understandable, to some extent) anxieties amongst the gymnasts and their federations... The newsletter is in PDF format and available in 7 languages, but not in Japanese!

From English version;

Dear Gymnastics Family in the World

If we look at radiation dosages in cities around the world and current conditions in Tokyo, we can see there is no difference. This Tokyo News Letter will communicate two pieces of information: (1) Data of various countries (from various websites) compiled by the Japanese government, and (2) Data that has been picked up by the World Gymnastics Executive Office.

(...)

(1) Radiation Dosages in Major Cities Worldwide (Source: Japan National Tourism Organization)
The radiation dosage in Tokyo is not higher than in other major cities around the world.

(*) Not measured by the U.S. government, but by a private organization. (**) The original data unit is nanogray per hour (nGy/h). The figure in this table calculates 1 nanogray per hour = 1 microsievert.

City - Radiation dosage (microsievert per hour) - Date of measurement - Reference website

Tokyo - 0.065 - May 5th - http://ftp.jaist.ac.jp/pub/emergency/monitoring.tokyo-eiken.go.jp/monitoring/hourly_data.html

New York - 0.095 - May 5th - http://digistar.com/boston/ (*)

Paris - 0.04-0.06 - May 5th - http://www.irsn.fr/FR/Documents/france.htm

Berlin - 0.071-0.083 - May 5th - http://odlinfo.bfs.de/

Singapore - 0.08 - May 5th - http://app2.nea.gov.sg/index.aspx

Hong Kong - 0.09-0.14 - May 5th - http://www.hko.gov.hk/radiation/ermp/rmn/app let/map/rmn_hourly_e.htm

Beijing - 0.079 (**) - May 5th - http://haq.mep.gov.cn/gzdt/

Taipei - 0.063 - May 5th - http://www.trmc.aec.gov.tw/utf8/eng/

Seoul - 0.108 - May 5th - http://www.mest.go.kr/web/42083/iernet/list.do

(*) Not measured by the U.S. government, but by a private organization. (**) The original data unit is nanogray per hour (nGy/h). The figure in this table calculates 1 nanogray per hour = 1 microsievert.
 
Following the announcement that TEPCO had found areas with significant amounts of radioactive strontium, the Japanese government will now be measuring it, too.

Japanese Government to monitor radioactive strontium levels

An advisor to Japan's prime minister says there needs to be close monitoring of radioactive strontium levels around the Fukushima Daiichi nuclear plant. Goshi Hosono made the remark to reporters on Monday, one day after Tokyo Electric Power Company detected high concentrations of strontium-90 in soil samples taken on April 18th inside the plant's compound. The amount is about 130 times higher than the maximum level observed within Fukushima Prefecture after past foreign atmospheric nuclear tests.

Hosono serves as the secretary general of a joint nuclear accident task force set up by the government and the operator of the plant.

Noting the danger of strontium to human health, he said a detailed investigation is needed, including analysis of past data, to determine how the radioactive substance was scattered. Once inhaled, radioactive strontium accumulates in bones, like calcium, and could cause cancer.

On April 13th, the science ministry announced that 3.3 to 32 becquerels per kilogram of strontium-90 was detected in soil samples from 3 locations in Namie Town and Iitate Village, 30-kilometers from the Fukushima plant. It also said an extremely small amount of strontium was found in plants taken from Motomiya city, Ono Town and Otama and Nishigo Villages, which are 40 to 80 kilometers from the Fukushima plant. The samples were taken on March 16th and 19th, 5 to 8 days after the accident at the plant.

Until now, the government has not checked strontium levels regularly or in wide areas as it's not easy to distinguish from other radioactive materials and takes time and labor to measure.

The science ministry plans to determine the best method for monitoring strontium.
Monday, May 09, 2011 21:05 +0900 (JST)

And, of course, that's the rub. Indeed, monitoring and/or measuring strontium is not that simple to do accurately, and it is labor intensive. Strontium is a beta emitter. It does not emit a strong gamma ray with a particular wavelength that can be instantly recognized, like cesium. The beta particles it emits are indistinguishable from beta particles emitted by other beta emitters.

From Wikipedia:
Note that 90Sr/Y is almost a perfectly pure beta source; the gamma photon emission from the decay of 90Y is so weak that it can normally be ignored.

Mycio in Wormwood Forest describes how laborious measuring strontium is this way:
A Belarusian scientist once told me that doing strontium chemistry was "women's work" compared to cesium. Cesium chemistry merely involved putting a sample into a machine...In contrast, just separating strontium from whatever matrix it is in requires a great deal of mixing, heating, centrifuging, and adding ingredients-all done in a beaker on a stove

[Mycio, Wormwood Forest, p 55.]

The particular strontium isotope of real interest in strontium 90, since it has a half life of 28.8 years. Strontium 89, the other isotope reported by TEPCO, has a half life of 50.57 days, and so is not a long term problem.

Furthermore, experience from Chernobyl shows that strontium was very unevenly distributed, so many, many points are needed to map the distribution accurately. Most of the strontium was deposited in particles of different sizes, and was essentially a bit of fuel rod, and was mixed with other materials. If you take up a sample with a relatively large particle or two, you will get a high concentration. And if your sample does not have a big particle, you can end up measuring not very much strontium at all. We already see that effect at Daiichi:

Playground Sr89 2,900 Becquerels per kg Sr90 400 Becquerels per kg
Forest of Wild Birds Sr 89 23 Becquerels per kg Sr 90 3.4 Becquerels per kg
Next to Industrial Waste Disposal facility Sr 89 4,400 Becquerels per kg Sr 90 570 Becquerels per kg

The Strontium 89 concentration looks scarier, but in a year, that 4,400 Becquerels per kg will be 30 Bequerels per kg, and if that were all, you could eat a kilogram of the dirt. And in another year, there would be less than 1 Becquerel per kg of Strontium 89 left. On the other hand, in one year, most of the 570 Becquerels per kg of strontium 90 will still be there.

In people, most of the strontium (70 to 80%) ingested is excreted in urine, so urinalysis of workers is a simple, but not all that accurate a way to monitor their exposure. The rest of the strontium behaves like calcium in the body, and so is deposited in bone, with a very small amount in other body parts. And once in bone, it stays there, and accumulates. Consequently, another way to measure strontium is to grind up and measure the concentration in teeth that have been pulled.
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The US government has encountered the problem of cleaning up strontium-contaminated sites in a number of the areas that were part of the bomb-production industry for the Cold War, particularly at Rocky Flats and Hanford. So there are precedents.

Plants that can be planted to have a high strontium uptake- kale, cabbage, bokchoy, black currants, trees other than pine.

And a barrier, made of apatite, can be used to keep strontium from leaching out of the soil into the sea or rivers:

Apatite barrier
http://hirschscience.blogspot.com/2007/09/apatite-barrier-appears-to-be-stopping.html

http://www.wmsym.org/archives/2009/pdfs/9325.pdf
In addition to apatite emplacement, phytoextraction is being tested as a polishing step for the sediment along the 100-N Area shoreline (Fig. 1). The proposed technology is based on the use of a native phreatophytic plant species, Coyote willow (Salix exigua), to extract Sr-90 from the vadose zone soil and aquifer sediments (phytoextraction) and filter Sr-90 (rhizofiltration) from the shallow groundwater along the riparian zone of the Columbia River. Strontium can act as a nutritional analog for calcium, which can account for 0.1 to > 5.0% of a plant’s dry weight.

Certain algae work quite well, too, as strontium getters in water.

http://www.informaworld.com/smpp/content~db=all~content=a905368062

Zeolites, such as are being used in the inner harbor at Daiichi, work quite well on strontium, too. Zeolite is nothing fancy. It is clay cat litter.

Natural zeolites rapidly adsorbed Sr in large amounts over a wide range of concentrations. The presence of Ca in the solutions of phosphogypsum did not prevent the adsorption of Sr by zeolites. A new approach for establishing the dose of adsorbent based on the experimental determination of the optimum ratio of zeolite to phosphogypsum is suggested. The 20:1 ratio of phosphogypsum to zeolite was found to give the optimum level of Sr adsorption at the lowest rate of zeolite in the given rate of concentration.

http://www.wivb.com/dpp/news/southern_tier/Wall-to-halt-radioactive-contamination
Wall to halt radioactive contamination
Updated: Thursday, 21 Oct 2010, 2:58 PM EDT
Published : Thursday, 21 Oct 2010, 2:58 PM EDT
Posted by: Eli George
BUFFALO, N.Y. (RELEASE) - A massive treatment wall under construction this week at a Western New York nuclear waste cleanup site will stop radioactive contamination in its tracks for literally decades, according to University at Buffalo engineers who modeled and tested the wall's material.

While the treatment method was specifically designed for the West Valley Demonstration Project, located 30 miles south of Buffalo, it may eventually be applicable to other radioactive sites around the nation.

Extending up to 30 feet underground, the 850-foot-long wall is being constructed with 2,000 metric tons of clinoptilolite, a volcanic zeolite mineral similar to the material used in cat litter, horse stalls and waste-disposal.

It is believed to be the first time that this kind of full-scale, permeable treatment wall is being used to filter out radioactive material, in this case, strontium-90, which is found in spent fuel rods in nuclear reactors.

"It functions the way a kitchen water filter does," says Alan Rabideau, PhD, professor of civil, structural and environmental engineering in the UB School of Engineering and Applied Sciences, "only in this case, the filter is selectively removing strontium-90 in the ground.
"As it is held in place, the strontium-90 will decay right in this huge 'filter,'" he explains. "It removes the strontium-90 and lets other dissolved minerals go."

According to officials at the West Valley Demonstration Project, the installation of the treatment wall is an important first step toward eventually closing the facility. Back in 1999, Rabideau's research team demonstrated that this form of clinoptilolite would be suitable for groundwater remediation at West Valley.

His original, experimental work demonstrated that a nonradioactive strontium, which behaves like strontium-90, is captured within the honeycomb structure of the zeolite mineral, leaving the groundwater essentially free of the contaminant.
..
"We now have a computational tool that predicts for how long the wall will remain effective," says Rabideau. "Our analysis shows that between 10 and 20 years is the minimum performance that we can expect at West Valley and some plausible scenarios show the wall lasting much longer."

http://homelandsecuritynewswire.com/cement-prison-old-radioactive-waste

And for those who want to compare the previous strontium measurements outside the plant to the new measurements inside the plant, here's the IAEA data:

http://www.iaea.org/newscenter/news/2011/fukushima130411.html
April 13th
MEXT reported on measurements of strontium-89 (half-life: 50.5 days) and strontium-90(half-life: 28.8 years) in three samples taken in one village in the Fukushima prefecture on 16 March. The activities in soil for Sr-89 ranged from 13 and 260 Bq/kg and for Sr-90 between 3.3 and 32 Bq/kg. Sr-90 was also distributed globally during nuclear weapons' testing in the atmosphere, typical global levels of Sr-90 in surface soils are in the order of one to a few becquerel per kg. Strontium was also measured in plant samples in four others villages, with values ranging from 12 to 61 Bq/kg for Sr-89 and 1.8 to 5.9 Bq/kg for Sr-90.
 
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mot, Yes, there is a lot of illogicality about radiation measurements. Currently large parts of Belarus and Ukraine are kept in an exclusion zone whose background radiation is significantly lower than in Denver (which is high because of its altitude), Finland (which is high because of having a lot of granite, and hence a lot of radon in homes), and especially than Ramshar, Iran where there are deposits of radium, thorium and uranium.

It's funny to see the worries about Tokyo when, for example, NY is much higher (partially due to coal plant smut, partially due to granite).

There's also something weirdly wacky in that we clean up this stuff with cat litter.
 
Meanwhile, Japanese nuclear scientists are asking for a single regulatory body, similar to the NRC in the US. They say having multiple bodies caused confusion in the disaster aftermath.

Chubu Electric has agreed to close all the Hamaoka reactors until it can be verified that they could stand up to a large earthquake and tsunami. Kan has said he will not ask for other reactors to be closed. Governors in 2 prefectures want more information from the government before allowing reactors that are down in their prefectures to be restarted.

Kan is also more interested in wind and solar these days, particularly in new housing built for the refugees from the tsunami and the nuclear evacuees. Look for no one to be planning for windmill fires, or huge garbage dumps for dead solar panels and batteries.

Evacuees return from brief home visits

Evacuees from a no-entry zone around the Fukushima Daiichi nuclear power plant have briefly visited their homes.

The 92 members of 54 households from Kawauchi Village on Tuesday became the first among evacuees from 9 municipalities in the zone to be allowed such visits.

The government set up the 20-kilometer zone on April 22nd, 6 weeks after the start of the nuclear accident at the plant.

The evacuees, aged from 21 to 85, put on protective clothing and received dosimeters and walkie-talkies at a gymnasium before entering the zone in 5 groups by bus.

During the visits, they collected valuables and checked on livestock. They then returned to the gymnasium and underwent radiation checks.

The visits were arranged at the request of the evacuees, many of whom left the area in response to an advisory.

Evacuees from Katsurao Village are to make similar visits on Thursday.

Such visits are to be allowed until the end of May, except in areas within 3 kilometers of the plant.

Tuesday, May 10, 2011 17:32 +0900 (JST)

Fukushima city to remove topsoil from schoolyards

The mayor of Fukushima city has agreed to a demand from parents and teachers to have radiation-contaminated topsoil removed from schoolyards.

Outdoor radiation levels temporarily exceeded safety limits last month at 10 kindergartens, nurseries, and elementary and junior high schools in the city.

The municipal board of education says most elementary schools continue to have students play and study indoors.

On Tuesday, members of a federation of local parent-teacher associations met with Mayor Takanori Seto.

They presented him with a request in writing seeking the removal of surface soil from schoolyards to prevent children from being exposed to radiation.

They also demanded a briefing for parents by municipal officials and radiation experts.

PTA federation chairman Tomoki Akiyama said conflicting information about how much radiation is safe has made parents increasingly concerned about the health of their children.

Mayor Seto said the city will start removing soil from schoolyards as soon as it decides on the most effective method.

Tuesday, May 10, 2011 16:04 +0900 (JST)

Perhaps the best thing to do would be to use the resin dust inhibitor to solidify the surface and then crack it off.

and

English teachers return to Fukushima

English language teachers are on their way back to Japan from their homes in the United States to teach again in disaster-hit Fukushima Prefecture.

8 American teachers in their early 20s departed from airports in New York and Cleveland, Ohio, on Monday to teach English at kindergartens and public junior high schools in Tamura City.

Part of the city lies within 20 kilometers of the damaged Fukushima Daiichi nuclear plant and is designated a no-go zone.

Celeste Laser from Mansfield, Ohio began teaching at kindergartens in Tamura City last year. But she returned home in the wake of the nuclear accident at the Fukushima plant.

Laser decided to go back to her job after being convinced by a Japanese organization which oversees foreign language teachers that it's safe to do so.

A send-off party was held in Mansfield on Sunday for English language teachers, including Laser, who were returning to Fukushima.

The teachers were asked to deliver pictures and letters from local children to their students in Japan.

Before boarding an airplane, Laser said she was a little scared of radiation and earthquakes, but that her love for Japan would help her overcome the fear.

Tuesday, May 10, 2011 10:42 +0900 (JST)

TEPCO wants government help to pay compensation to the dislocated, and the government has set conditions for help:

Govt demands financial efforts of TEPCO

The government has demanded Tokyo Electric Power Company make as much effort as it can if the company is to receive state financial help in paying compensation over the accident at its nuclear plant in Fukushima.

Chief Cabinet Secretary Yukio Edano, Economy, Trade and Industry Minister Banri Kaieda and other related ministers discussed on Tuesday what efforts TEPCO needs to make.

The government called for the company's utmost efforts to streamline its operations and cut costs, except for expenses necessary for a stable supply of electricity.

It also called on the utility to allow an independent panel to carry out a survey on its management finance for tighter asset assessment and a review of its expenses.

The demand was conveyed to the company on Tuesday evening.

Earlier in the day, TEPCO asked the government for its financial help to make sure the company can offer compensation.

The company said its chairman, president and other board members will decline their salaries and bonuses for the time being. It also said it will sell securities, properties and other assets to raise funds.

Tuesday, May 10, 2011 22:14 +0900 (JST)
 
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TEPCO has released a video of the spent fuel pool at No. 3 plant showing massive amounts of building debris in the pool. The debris includes steel I-beams, concrete and building material rubble, and masses of reinforcing iron bars as well as cables and other miscellaneous material. In fact, it's practically impossible in the video released to make any estimation of spent fuel condition because you can't see it.

So possibly, fuel rods were broken, resulting from the debris landing in the pool. This is the opposite of what happened in Unit 4-

And more new robots for the Daiichi calendar:

http://atomicpowerreview.blogspot.com/2011/05/tepco-new-equipment-illustrations.html
 
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May 11th, 2:00 PM JST Wind East North East
Daini
Six peripheral points ( 1.9, 1.5, 2.0, 1.7, 1.7, 1.6) microSieverts per hour
Seventh manual point 9:00 AM 1.2 microSieverts per hour
Daiichi
Eight Peripheral Points ( 6, 27, 19, 17, 23, 46, 136, 136 ) microSieverts per hour
Main Office Building 399 microSieverts per hour
Main Gate 43 microSieverts per hour
West Gate 16 microSieverts per hour
Cart near West Gate 17.6 microSieverts per hour
The spraying seems to be taking effect at Daiichi (and of course, the I31 is just disappearing due to its short half life). The dust concentration looks significantly lower, despite all the extra work moving things while doing site work. All dust components are below 1.0E-05 for two days running. A month ago, all dust components were between 1.0E-03 and 1.0E-04.
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110511e6.pdf
However at Daiini (page 2 in the graphs) while Iodine has definitely fallen, Cesium is staying steady in the 1.0E-5 region.
Seawater charts outside the inner harbor still looking good. Only Cesium 134 is over the limit for water outside of the monitoring area, and that only slightly over at the north and south discharge canals.
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110511e6.pdf
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110511e7.pdf
JAIF shows the sand lances out of spec again, but many classes of areas have nothing found there.
http://www.jaif.or.jp/english/news_images/pdf/ENGNEWS01_1305078136P.pdf

-On May 8, we took approximately 40ml of pool water using concrete pumping vehicle, in order to check the status within Unit 3 spent fuel pool. On May 10, we conducted a nuclide analysis with the collected pool water, and detected Cesium-134, Cesium-136, Cesium-137, and Iodine-131. We will conduct further detailed analyses.

-From May 10, in order to install an alternative cooling facility of Unit 3, removal of piles of rubble around carry-in gate for large stuff of the reactor building by robots and unmanned heavy equipments were conducted.

-From 11:00am to 12:30pm May 10, we conducted water transfer from Unit 6 reactor building to Unit 6 radiation waste treatment building (Approximately 10 m3).

-At 10:00am May 10, we resumed transfer of Unit 6 turbine building basement water to the temporary tank. The transfer pump was stopped at 4:00pm (Approximately 120 m3).

-We will conduct a nuclide analysis at Fukushima Daini Nuclear Power Station, on the water transferred to the Centralized Radiation Waste Treatment Facility. We are planning to gain cooperation from other nuclear institutions or corporations.

And at 3:00 PM JST May 11th, they report
We calibrated water level gauge of the reactor of Unit 1 from May 10 to 11.

-We calibrated pressure gauge of the primary containment vessel of Unit 1 on May 11.

-The pump to inject nitrogen to Unit 1 is stopped from 8:51 am on May 11 since part of power source of Unit 1 & 2 has been switched to Okuma Line No.2.

-We have restarted to transfer the accumulated water in the turbine building of Unit 6 to the temporary tank at 10:00 am on May 11.

-Spraying the dust inhibitor to areas including nearby Solid Waste Storing Facility has been carried out in conventional method as of May 11.

At around 12:30pm, May 11, 2011, employees who had been conducting vertical shaft obstruction work, confirmed water flowing into the pit* via power cable pipe lines. Currently, together with investigating the possible leakage of water including radioactive materials to the outside of the boundary, we have taken samples of the water in the pit and the seawater in the intake canal of Unit 3, and analyses are underway at Fukushima Daini Nuclear Power Station. We will conduct water stoppage measures in the pit. In addition, we have been orally instructed by the Nuclear and Industrial Safety Agent (NISA) as follows:
-To confirm an impact to the ocean
-To immediately conduct water stoppage measures
-To immediately identify the route of the inflow/outflow and the situation and report to NISA We will take measures to follow the above instruction. * pit: A vertical shaft made of concrete
Considering that radiation levels in the ocean are looking good, it's good they found this.
Diagram of the layout
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110511e9.pdf

And News from NHK:

This is good news. People will get their money more quickly than if the government and TEPCO squabble about who owes the money.

TEPCO accepts conditions for state support

Tokyo Electric Power Company has accepted government conditions for state support in compensating people effected by the accident at its Fukushima Daiichi nuclear power plant. TEPCO reached the decision on Wednesday at an extraordinary board meeting, and the same day conveyed it to the Ministry of Economy, Trade and Industry.

The government had earlier asked the utility not to set a ceiling on compensation payments in advance, to make thorough streamlining efforts, and to accept a third-party investigation of its finances among other conditions. The government now plans to finalize a framework for compensation this week. It aims to establish a new entity to help TEPCO pay damages by seeking financial contributions from all nuclear power plant operators.
Wednesday, May 11, 2011 14:19 +0900 (JST)
●TEPCO apologizes again 2 months after accident (and actual progress report items)
The operator of the Fukushima Daiichi power plant has apologized again, 2 months af
ter the massive earthquake and tsunami that crippled the nuclear facility. On Wednesday, senior official of Tokyo Electric Power Company or TEPCO, Junichi Matsumoto, told a news conference the firm regrets that those forced to evacuate the area around the plant have not been able to return home.

Matsumoto admitted to some delays in implementing the utility's plan to bring the troubled plant under control. But he said no major obstacles have arisen so far. He said TEPCO will announce its assessment of the progress it has made on May 17th, one month into its restoration plan.

At the No. 1 reactor, where the most progress has been made, work to calibrate the water gauges continued on Wednesday. Similar work on the pressure gauges is expected to start the same day. This work is part of preparations to fill the reactor's containment vessel with water, leading to a stable cooling of the reactor.
Wednesday, May 11, 2011 12:49 +0900 (JST)


It would be better if they buried it into the ground with a layer of clay cat litter under and over it.

Gov't: Burying contaminated soil into ground works

The Japanese government plans to inform schools in Fukushima Prefecture that burying radiation-contaminated topsoil into the ground is an effective way to reduce its radiation level.

The education and science ministry concluded this after conducting an experiment at a school in Fukushima City on Sunday. The ministry says that burying contaminated soil 50 centimeters underground reduced the overall radiation level by 90 percent.

After the nuclear accident at the Fukushima Daiichi power plant, schools in the prefecture have been restricting outdoor activities. Radiation levels in soil at all the schools, except for one, remain within the official limit for children playing outdoors.

Schools in the cities of Koriyama and Date have removed the topsoil in their schoolyards as a precaution. But schools have not been able to get the soil transported away from the premises because of the lack of government disposal guidelines for irradiated soil.

The government will report its latest findings to the prefecture's education board and the Nuclear Safety Commission on Wednesday.
Wednesday, May 11, 2011 07:02 +0900 (JST)

Japan stresses food safety to foreign media

Japan's government has stressed the safety of Japanese food at a luncheon held for about 50 foreign journalists in Tokyo.

The event at the Foreign Correspondents' Club of Japan on Tuesday follows moves by a number of countries to impose bans on food imports from Japan due to concerns over radioactive contamination.

Food served at the meal included fish caught off the coast of northeastern Japan and vegetables from the eastern prefecture of Ibaraki, which is close to the crippled Fukushima Daiichi nuclear plant.

A government official told the assembled reporters that more than 40 countries and territories have implemented various kinds of import restrictions, even though Japan's food safety standards are among the toughest in the world.

He said unfounded rumors about food safety are plaguing farmers in the disaster-stricken areas, and expressed hope that countries would buy more Japanese food.

One of the reporters cited the recent food poisoning at a barbeque restaurant chain in Japan that killed 4 people, and asked if the country's food safety standards are sufficient. Another reporter said that Japan's safety criteria for food shipments are not clear.
Tuesday, May 10, 2011 19:13 +0900 (JST)
UN disaster confab discusses Fukushima accident
A UN-sponsored conference on disaster preparedness that opened in Geneva on Tuesday has taken up the accident at the Fukushima Daiichi nuclear plant as its main topic. The Global Platform for Disaster Risk Reduction has been held every other year since 2007. Some 2,700 government officials and delegates from about 170 nations are taking part in the 4-day meeting.

UN Secretary General Ban Ki Moon addressed the plenary session and called for tighter safety standards at nuclear power stations to better protect citizens.

A civic group representative said some nuclear reactors are ill-prepared for earthquakes and tsunami. Many participants called for stronger measures to contain damage at nuclear plants. A Japanese government official said the country will quickly provide information and share its analysis of the Fukushima nuclear accident with other nations.

On Wednesday, delegates from each country are expected to discuss how to rebuild the areas devastated by the March 11th earthquake and tsunami.
Wednesday, May 11, 2011 07:02 +0900 (JST)
 
Other stuff
From the NY Times, a little more info about Hamaoka closing:

http://www.nytimes.com/2011/05/09/world/asia/09japan.html?_r=1

Critics have long warned of a possible accident at the Hamaoka plant, which is upwind of Tokyo. Mr. Kan asked that the plant be closed until a tsunami-resistant wall could be built and backup systems could be installed to strengthen the plant against earthquakes.

And apparently, not content with US internal disagreements on finishing Yucca Mountain, Japan and the US are dealing with Mongolia to store spent fuel:

http://www.reuters.com/article/2011/05/09/energy-nuclear-mongolia-idUSL3E7G80HD20110509

Japan, U.S. plan nuclear waste storage in Mongolia -paper

TOKYO | Sun May 8, 2011 10:18pm EDT

TOKYO May 9 (Reuters) - Japan and the United States plan to jointly build a spent nuclear fuel storage facility in Mongolia to serve customers of their nuclear plant exporters, pushing ahead despite Japan's prolonged nuclear crisis, the Mainichi daily said on Monday.

A Trade Ministry official said Japan, U.S. and Mongolia officials, at a meeting shortly before Japan's March 11 earthquake, informally discussed possible construction of a nuclear waste storage facility for countries with nuclear power plants but no spent fuel storage capability of their own

This is still up in the air, but this is not:

Mongolia plans to have its first nuclear power plant by 2020 and to build nuclear fuel production capacity to tap its rich uranium resources, undeterred by the crisis at Japan's Fukushima nuclear power complex, a senior official at the state-owned MonAtom LLC said in April. MonAtom represents the Mongolian government in mining and developing the country's uranium resources.

Apparently Mongolia is planning their long term spent fuel storage upfront. A good idea.

The article's final question is a good one:

Are the political barriers to reprocessing so significant that Japan and the U.S. would give away such a valuable resource to resolve them?
 
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http://www.nei.org/newsandevents/ne...for-improving-nuclear-fuel-safety-efficiency/

The US Nuclear Industry has its version of the Oscars

TVA Employees Win Top Innovation Award for Improving Nuclear Fuel Safety, Efficiency

Entergy Employees Garner Award for Tungsten Shielding Breakthrough Being Used at Japanese Power Station

There are a sizable group of other interesting developments, even more impressive given the age of the US nuclear fleet.

The tungsten material ought to be used in the Unit 1 shielding rather than lead mats, I would think.
 
The food situation is something I've thought about. I used to enjoy a bottled unsweetened green tea that's processed in Japan, and I haven't bought it since the event. I'm also looking at soy sauce before I buy. I feel bad, because I'd love to support Japan economically, and I'm not buying a car anytime soon. But I don't know if I am good enough at evaluating the information and don't want to gamble. The irony is that as Japanese authorities say, they have an unusually stringent standard of food inspection. (Unlike, I'm sorry to say, China.)


On another topic: oh, brave new world! Using kitty litter to protect us from nuclear leakage. I always knew cats were crucial to the well-being of the world.
 
Last measurement of temperature at Unit 1 was only slightly above boiling, 114 C
Other people will be weighing in.

TEPCO to review No. 1 reactor plan

Tokyo Electric Power Company is being forced to review its strategy for stabilizing the Fukushima Daiichi nuclear plant after announcing that one of its reactors is in a state of "meltdown."

TEPCO revealed on Thursday that most of the fuel rods in the No.1 reactor are believed to have melted and fallen to the bottom of the reactor.

The company said the coolant water in the reactor had dropped to a level that would completely expose fuel rods.

TEPCO believes the fuel at the bottom has cooled down, judging from the surface temperature of the reactor.
On Friday, workers brought in equipment for connecting a circulating cooling system to the reactor, in line with a plan TEPCO decided last month.

Under the plan, the utility was to fill the No. 1 reactor containment vessel with water. A cooling system was to be set up that would circulate this water through a heat exchanger.

But this system will only work if the water in the containment vessel is at least 5 meters deep.

TEPCO says it does not know the current water level, but is hoping to quickly establish a way to find out.

Economy, Trade and Industry Minister Banri Kaieda said it is a fact that the water injected into the No.1 reactor leaked away because of a hole or holes created by the meltdown.

He said this is the main reason why TEPCO's plan needs to be reviewed.

Friday, May 13, 2011 13:17 +0900 (JST)


NISA: no need to flood No.1 reactor

An official of Japan's nuclear safety agency has suggested that a nuclear fuel meltdown at one of the damaged Fukushima reactors means that filling the reactor's container with water may be meaningless.

Hidehiko Nishiyama told reporters on Friday that melted rods at the bottom of the No. 1 reactor are being cooled by a small amount of water.

He said he doubts that it's necessary to flood the containment vessel entirely, as the plant operator has been trying to do.

The operator, TEPCO, said on Thursday that most of the fuel rods in the reactor are believed to have melted and sunk to the bottom of the reactor's pressure vessel.

TEPCO says the melted fuel has apparently cooled, even though much of the injected water is leaking through holes at the bottom of the vessel. Under a plan decided last month, the utility was to fill up the containment vessel with water and set up a system to circulate the water through a heat exchanger.

Nishiyama said TEPCO need only inject water to a height that would allow the system to work.

He said the utility will likely change its strategy and inject water to the minimum necessary level.

Friday, May 13, 2011 16:08 +0900 (JST)
Here's where the water came from on the Unit 3 leak. So far the water in the inner harbor is affected; back to about the April 23rd level inside the silt fence. It doesn't look like all that much spilled, compared to the Unit 2 leak. We'll know more when today's results come in.

http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110512e13.pdf


Radioactive water leaked while being transferred

Tokyo Electric Power Company says an operation to transfer highly radioactive water pooled in the turbine building of the Fukushima Daiichi nuclear power plant's No.3 reactor caused contamination of the sea nearby.

Highly radioactive water was found leaking into the sea from a pit near the reactor's water intake on Wednesday.

The utility company says 1,200 becquerels of radioactive cesium 134 were detected in one cubic centimeter of sea water near the water intake on Thursday. The figure is 20,000 times the state limit. 1,200 becquerels of radioactive cesium 137, which is 13,000 times the state limit, were also detected.

The company transferred radioactive water from the turbine building of the No.3 reactor earlier this month. It says during that process radioactive water leaked out from an underground pipe connected to the pit.

The company admitted in a news conference on Thursday that prior inspections to prevent leaks were inadequate.

Last month, highly radioactive water leaked into the ocean from a pit near the No.2 reactor.

Friday, May 13, 2011 05:21 +0900 (JST)

and

US nuclear regulators discuss Fukushima accident

US nuclear regulators have announced their views on the status of Japan's troubled Fukushima Daiichi nuclear power plant and the safety of nuclear reactors in the United States.

The Nuclear Regulatory Commission on Thursday held its first hearing since the nuclear accident in Japan.

The commission's executive director for operations, Bill Borchardt, said while conditions at the Japanese plant are not entirely stable, they are not changing at a pace to cause undue concern.

He expressed concern that high levels of radiation are still being detected near the reactors and that the structure containing a spent nuclear fuel pool at one of the reactors may not be strong enough.
The hearing went on to discuss how to enhance the safety of nuclear power plants in the US.

The commission said it has found that preparations for an extended loss of power at the plants are inadequate. It said it has instructed plant operators to immediately reexamine their implementation of safety measures and report back.

The commission aims to release an interim report of its safety improvements in July.

Friday, May 13, 2011 09:46 +0900 (JST)

Meanwhile, another batch of plants has shown excessively cesium; parsley, some tea, and pasture grass, the last of the most concern. Discussions about safe farming are underway.

And in fact, we have had some of those discussions here. Some of it is what you can grow that doesn't have a big uptake of potassium (for stuff that you plan to eat). In areas where that can be done, growing stuff that deliberately removes cesium (stuff that has a big uptake of calcium). In some cases, stripping off the top 10 cm of soil, where most of the stuff is, entombing the soil to the side of the field in kitty litter clay (top, side and bottom). In Chernobyl, the stuff that was entombed in clay stayed isolated longer than the stuff in concrete, partially because of the gettering of the clay, and partially because of the presence of cesium eating (and hence 'fixing' ) bacteria in the clay. Stuff can be measured leaking out of the concrete today.
 
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As to what TEPCO is saying, mostly the usual, except that due to the government and TEPCO having reached agreement, payment to evacuees will be made swiftly.


And to deal with warming at Unit 3.:
-At 4:53 pm on May 12th, as a part of work to switch the water injection line to the nuclear reactor of Unit 3 from the fire extinction system piping arrangement to the reactor feed water system piping arrangement, we started water injection through the reactor feed water system piping arrangement at approximately 3 m3/h in addition to the fire extinction
system piping arrangement at approximately 9 m3/h.

Last data showed temperature at Unit 3 down some 40C from 2 days ago.

-At 10:00am on May 12th, we restarted transferring accumulated water on the basement in the turbine building of Unit 6 to the Radiation Waste
Treatment Building. At 4:00pm on the same day, we stopped the pumps for the transfer (approximately 120 m3).

and
- At 9:01am on May 10th, we temporarily suspended the transfer of high level radioactive wastewater from the vertical shaft near the turbine building of Unit 2 to the Centralized Radiation Waste Treatment Facility, in order to lay out pipes from the turbine building of Unit 3. At 3:20 pm on May 12th, since part of its laying out pipes operation, which affect to workers in exposed dose is finished we restarted the transfer.

and

May 13th, 2:00 PM JST
Daiichi
Wind
is in the West

Eight peripheral measurement points ( 6, 26, 19, 17, 22, 44, 132, 134 ) microSieverts per hour
Main office building 380 microSieverts per hour
West Gate 15 microSieverts per hour
Cart near West Gate 17 microSieverts per hour

Daini
Six peripheral measurements ( 1.9, 1.5, 2.0, 1.7, 1.7, 1.6 ) microSieverts per hour
manual measurement 9:00 AM 1.1 microSieverts per hour

and today's water measurements for the inner harbor has a bar screen for Unit 3.

The measurements went up yesterday and are going down today, so looks like they understand leakage stoppage these days.
 
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Energy Dept: US will help contain Fukushima crisis

A high-ranking official at the US Energy Department says the United Sates will continue helping Japan to put the Fukushima Daiichi nuclear power plant under control. Deputy Secretary Daniel Poneman is the US government's contact for the ongoing accident at the plant. He told NHK on Thursday that the US government has kept in close contact with the Japanese government since the accident happened in March.

The US has offered assistance to help the plant's operator dispose of massive amounts of radioactive water and cool down the storage pools of spent nuclear fuel. Poneman said the US will continue the close coordination for several months to help stabilize the plant.

Referring to information offered by Japan right after the accident, Poneman said the US side had difficulty grasping what was actually happening. He said if US officials had been able to obtain data more quickly, they could have given better advice.

Poneman said that even before the Fukushima crisis, the US had repeatedly urged Japan to ratify an international treaty over damage from serious nuclear plant accidents. He expressed hope that Japan will ratify the pact soon. Under the treaty, compensation for serious nuclear accidents would be financially supported by funds collected from the signatories.

Friday, May 13, 2011 13:17 +0900 (JST)

And yes, insurance is expensive, except when you need it. The only reason I can see that a country would not want to sign is so that they could avoid paying to help others. I hope Japan signs.
 
The water here in CT is not so hot either--it's very hard to get clothes clean in it.

IAEA has an update. However, they are not swearing to what's gone on the last 2 days, a position I quite understand. They just posted this, but it does not include latest TEPCO speculatins about Unit1 or the water spill that occurred when draining Unit 3. For one thing, I'm not sure either what's going on with unit One-It's hard to picture a cool meltdown for me. Anything I might say about it would be highly speculative. And I can't help wondering--this idea has arisen after they calibrated a water gauge. And as someone who spent a long time in charge of a repair team that worked on old, often malfunctioning equipment, I can tell you:

Your first thought is always that the worst thing you can envision has happened. Then you discover you kicked the electric plug out of the wall or miscalibrated something, or something easy like that.

NHK has reported this, but it is perhaps significant that neither TEPCO nor JAIF has a report on it.

OTOH, it looks like the Unit3 water problem ( both the stuff they spilled because they screwed up the piping, and the rising temperature of the Reactor, which appears to be dropping since they went back to a previous way of piping, are probably back to unstably stable:

IAEA Briefing on Fukushima Nuclear Accident (4 - 11 May 2011, 17:00 UTC)


Presentations:
→ Summary of Reactor Status: Unit 1, 11 May 2011
→ Summary of Reactor Status: Unit 2, 11 May 2011
→ Summary of Reactor Status: Unit 3, 11 May 2011

On Friday, 13 May 2011, the IAEA provided the following information on the status of nuclear safety in Japan:

1. Emergency at Fukushima Daiichi Nuclear Power Plant

Overall, the situation at the Fukushima Daiichi nuclear power plant remains very serious.

The IAEA receives information from various official sources in Japan through the Japanese national competent authority, the Nuclear and Industrial Safety Agency (NISA). This Update Brief is based on information issued by the IAEA Incident and Emergency Centre up to 17:00 UTC on 11 May 2011.

Fukushima Daiichi Nuclear Power Plant Status

The three attached charts, one for each of the Units 1 - 3, track progress made towards fulfilling the three basic safety functions of the IAEA safety standards: prevention of criticality, removal of decay heat and mitigation of radioactive releases. The chart replaces the three-colour status chart that was used previously. The charts are cross-referenced to the Tokyo Electric Power Company (TEPCO) "Roadmap" plan to bring the nuclear reactors and the spent fuel pools at the Fukushima Daiichi plant to a stable cooling condition and to mitigate radioactive releases.

Nitrogen gas is still being injected into the containment vessel in Unit 1 to reduce the possibility of hydrogen combustion inside the containment vessel.

TEPCO has elaborated a measure to fill the primary containment vessel of Unit 1 with water up to a level above the reactor fuel rods. This measure is intended to provide stable cooling of the reactor and reactor pressure vessel. The planned steps are:

1.Reduce radiation levels in the reactor building by installing a filtered air circulation system (completed), remove rubble, decontaminate and install shielding;
2.Recalibrate existing reactor pressure vessel water level and pressure instruments and install additional reactor pressure vessel water level gauges to improve monitoring of conditions inside the reactor pressure vessel;
3.Install primary and secondary closed-loop cooling systems;
4.Flood the containment to provide a water supply for the primary system.
In Units 1, 2 and 3 fresh water is being continuously injected into the reactor pressure vessel; temperatures and pressures remain stable.

To protect against potential damage as a result of future earthquakes, TEPCO started work on 9 May to install a supporting structure for the floor of the spent fuel pool of Unit 4.

Fresh water is being injected as necessary into the spent fuel pools of Units 1 - 4.

Stagnant water with high-level radioactivity in the basement of the turbine buildings of Unit 1, Unit 2 and Unit 3 is being transferred to the condensers, the radioactive waste treatment facility and temporary storage tanks. Stagnant water in the basement of the turbine building of Unit 6 is being transferred to a temporary tank. Countermeasures against the outflow of water to the sea and to prevent and minimize the dispersion of radionuclides in water have been put in place.

Full-scale spraying of anti-scattering agent is continuing at the site with the use of both conventional and remote controlled equipment.

2. Radiation Monitoring

Deposition in 47 Prefectures

The daily monitoring of the deposition of caesium and iodine radionuclides for 47 prefectures is continuing. For the period 5 - 10 May, deposition of I-131 was detected in three prefectures, with values ranging from 1.5 Bq/m2 to 4.5 Bq/m2. Deposition of Cs-137 was detected in eight prefectures in the same period, the values reported ranging from 3 Bq/m2 to 44 Bq/m2. The reported values show that variable but low level deposition of radionuclides was still occurring in some prefectures.

Gamma Dose Rates in 47 Prefectures

Gamma dose rates are measured daily in all 47 prefectures. On 10 May the value of gamma dose rate reported for Fukushima prefecture was 1.7 µSv/h. In all other prefectures, reported gamma dose rates were below 0.1 µSv/h with a general decreasing trend.

Gamma Dose Rates in Areas More Than 30 km from Fukushima Daiichi Plant

Gamma dose rates reported specifically for the monitoring points in the eastern part of Fukushima prefecture, for distances of more than 30 km from the Fukushima Daiichi plant, showed a general decreasing trend, ranging from 0.1 µSv/h to 20.3 µSv/h, as reported for 10 May.

Maps of gamma dose rates, deposition of Cs-134 and deposition of Cs-137 within the 80 km zone around the Fukushima Daiichi plant were produced by means of aerial gamma ray monitoring by the Nuclear Safety Technology Centre of MEXT and the United States Department of Energy (DOE). The maps show that the results obtained are consistent with all previous measurements of deposition in soil and of dose rates.

Air Concentrations of Radionuclides On-site at Fukushima Daiichi Plant

On-site measurements at the west gate of the Fukushima Daiichi plant indicate the presence of I-131 and Cs-137 in the air in the close vicinity of the plant (within approximately 1 km). The concentrations in air reported for 10 May were 4 Bq/m3 for total I-131 and 16 Bq/m3 for total Cs-137. The values observed in the previous days show daily fluctuations with an overall decreasing tendency.

Concentrations of Radionuclides in Drinking Water

As of 10 May, the restriction on the consumption of drinking water relating to I-131 - which had been applied since 1 April as a precautionary measure for one remaining location (the village of Iitate in Fukushima prefecture), and only for infants - was lifted.
Food Monitoring and Food Restrictions

Food Monitoring

The Ministry of Health, Labour and Welfare reported on the radionuclide test results for 4 - 11 May for 436 food samples from 14 different prefectures. The prefectures of Chiba, Fukushima, Gunma, Ibaraki, Miyagi, Niigata and Tochigi accounted for more than 90% of the reported food analysis results, with most food monitoring concentrated in Fukushima prefecture (52% of samples analysed and reported until 11 May). In two prefectures (Fukushima and Kanagawa), 17 out of 436 (3.9%) samples were found to have radioactivity above the Japanese regulation values.

In Fukushima prefecture, levels in 212 (93%) of the 228 samples reported were below the regulation values for I-131 and radioactive caesium. However, 16 of the 228 samples (7%) exceeded the regulation values set by the Japanese authorities for Cs-134/Cs-137, including bamboo shoots (eight samples), shiitake mushrooms (four samples), ostrich fern (two samples), turnip (one sample) and sand lance fish (one sample).

In Kanagawa prefecture, unprocessed tea leaves were the only food that exceeded the regulation values set by the Japanese authorities for Cs-134/Cs-137 (one of thirteen samples, i.e. 7.7%).

Food Restrictions

As of 11 May, the only food restrictions remaining are in Fukushima prefecture and for the cities of Kitaibaraki and Takahagi in Ibaraki prefecture.

In Fukushima prefecture there are restrictions on the distribution and consumption of sand lance fish. In specified areas of Fukushima prefecture there are also restrictions on the distribution of raw unprocessed milk, turnips, bamboo shoots, ostrich ferns and shiitake mushrooms, and restrictions on the distribution and consumption of specific non-head type and head-type vegetables (e.g. spinach and cabbage), flowerhead brassicas (e.g. cauliflower) and shiitake mushrooms.

In Ibaraki prefecture there is a continuing restriction on the distribution of spinach produced in the cities of Kitaibaraki and Takahagi.

3. Marine Monitoring

The marine monitoring programme is carried out both near the discharge areas of the Fukushima Daiichi plant by TEPCO and at off-shore stations by MEXT. The increase in the radioactivity in the marine environment had occurred by aerial deposition and by discharges and outflow of water with high level radioactivity.

Seawater Monitoring

The activity concentrations of I-131, Cs-134 and Cs-137 in seawater close to the Fukushima Daiichi plant at the screen of Unit 2 have been measured every day since 2 April. Concentrations of Cs-134 and Cs-137 decreased from initial values of more than 100 MBq/L to less than 10 kBq/L on 30 April and have remained constant at this level to the present.

Levels of I-131 on 7 May remained at around 200 Bq/L.

As of 7 May, no relevant changes in the radionuclides concentrations at the other TEPCO sampling positions have been reported.
 
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TEPCO, on its website, is not talking about any of this. But it's a fact that if the water isn't in the reactor, it must be somewhere else? And for that matter, how did the reactor maintain the high level of pressure from all the injected nitrogen? I would assume the containment vessel is full of water, if it is all true.

TEPCO searching for 'missing' radioactive water

The operator of the Fukushima Daiichi nuclear power plant is trying to locate thousands of tons of radioactive water that has leaked from one of the damaged reactors.

Tokyo Electric Power Company, or TEPCO, says contaminated water is apparently leaking from the No.1 reactor, which is in a state of meltdown.

TEPCO has injected more than 10,000 tons of water into the reactor since the March 11th disaster damaged the plant. But, less than half that amount is believed to remain in the reactor or its container vessel.

The utility says the leaked water is likely in the basement of the reactor building -- still a no-go zone due to concerns over high radiation levels.

TEPCO is considering using remote-controlled robots to check the situation, but says the wireless links needed to control them may not reach the basement and that it has to explore other options as well.

Injected water is continuing to stabilize the reactor, but any radioactive water that has leaked could hamper the effort.

TEPCO says it hopes to come up with ways to retrieve and purify contaminated water to use it to cool the reactor again.

Friday, May 13, 2011 21:27 +0900 (JST)

And people are dying from being saved:

After-quake deaths top 500

NHK has learned that at least 524 survivors of the March 11th disaster have died -- many of them due to stress and fatigue.

NHK contacted 241 hospitals in the 3 disaster-stricken prefectures in northeastern Japan.

It found the number of survivors who have died due to wide-ranging effects of the disaster reached 347 in Miyagi, 123 in Fukushima and 54 in Iwate.

41 percent of the deaths occurred during the first 2 weeks after March 11th. 26 people have died since the start of May, and the figure continues to rise.

Nearly 90 percent of the victims were aged 65 or older. But children as young as 2 have also succumbed to hypothermia and infectious diseases.

62 percent of the deaths involved cardiac and respiratory failures, including heart infarction and pneumonia.

Most deaths in the first 2 weeks following the disaster were related to shock, or due to the loss of power to medical equipment.

But the causes of deaths during the most recent 2 weeks were more preventable. They include fatigue and stress caused by extended stays at public shelters, which led to declines in immunity and high blood pressure.

Jichi Medical University Professor Kazuomi Kario has treated patients in disaster areas.

He says deaths can be prevented by improving food, sleep and living conditions. He says it is a great shame to lose people who have survived the quake and tsunami.

Friday, May 13, 2011 19:53 +0900 (JST)

and what are some of them dying of? Kitamura's most recent diaries of his life as an evacuee gives a clue:

http://www.jaif.or.jp/english/news_images/pdf/ENGNEWS01_1305276778P.pdf

2. Noro virus
The norovirus is going around in the Big Palette from a couple of days ago. About 40 to 50 people were isolated in a separate room, complaining nauseousness. Today about 40 people were in line for diagnosis at the aid station. An ambulance comes oftener than before. Precautions might have been a bit insufficient,
despite this was foreseen. As the infection via hands will be the main route, disinfectants for hands are placed at the entrance of the aid station. Precautions are needed as we have many aged and out-of-shape people, who are vulnerable.

And here's the following installment.
http://www.jaif.or.jp/english/news_images/pdf/ENGNEWS01_1305276801P.pdf

Really, NISA should review that JAIF map and send as many people as feasible back home where they might stay alive now, particularly families with no kids should go back.

http://www.jaif.or.jp/english/news_images/pdf/ENGNEWS01_1305269890P.pdf

Air Dose Rate over 1 meter above
Ground Level (microSv/h)
Normalized to April 29
19 - 91 RED
9.5 - 19 ORANGE
3.8 - 9.5 YELLOW
1.9 - 3.8 GREEN
1.0 - 1.9 LIGHT BLUE
below 1.0 DARK BLUE


From the map, people from Tomioka and almost all of Okuma, and Kawauchi should be able to go home. If necessary, they could always be evacuated again. Radiation there was less on April 29th than at Iitate village, (orange & yellow). Those towns were blue, green with some yellow. Even on April 29th, all of those had lower background than Ramshar, Iran.

And what is TEPCO talking about?

The design for the new enclosure for Unit 1, construction to be started in June, but site prep being started now:
Prior to the installation work of the cover for the reactor building, we have decided to commence the preparation work from May 13th, including flattening the ground to bring crawler cranes into the site.
:

http://www.tepco.co.jp/en/press/corp-com/release/11051312-e.html

Here's a picture:

http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110513_02.gif
 
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I've been very interested to see what NEI would say about all this. :

Latest NEI Updates
UPDATE AS OF 1:30 P.M. EDT, FRIDAY, MAY 13:
Below is a round-up of noteworthy news that happened this week with regard to the Fukushima Daiichi nuclear plant and the U.S. nuclear industry's response.


Plant Status

Japan's nuclear safety agency has suggested that significant damage to fuel at Fukushima Daiichi 1 means that filling the reactor containment vessel with water may be meaningless. The agency's Hidehiko Nishiyama said on Friday that melted fuel rods at the bottom of reactor 1 are being cooled by a small amount of water. He said he doubts that it is necessary to flood the containment vessel entirely, as workers have been trying to do. Tokyo Electric Power Co. said on Thursday that most of the fuel rods in the reactor are believed to be damaged and are at the bottom of the reactor's pressure vessel. Based on the temperature of the reactor vessel surface temperature, the company says the fuel apparently has cooled.

TEPCO announced this week delays in its schedule to contain the reactors. The company noted that while its work to restore reactor 1 is in progress, it had not begun these measures at the other reactors at the sites. It said that high levels of radiation in the reactor 1 building could force a change in plans.

TEPCO has accepted terms established by the Japanese government for state support to compensate those affected by the accident at the Fukushima Daiichi plant. Under the framework, a new state-backed institution will be set up to facilitate quick payments to those affected by the Fukushima events. The body would receive financial contributions from electric power companies that own nuclear power plants in Japan. The government will inject public funds by allocating to the institution special bonds that can be cashed whenever necessary. The institution would strengthen TEPCO's capital base by making use of these funds to pay compensation claims and make business investments. The institution would annually return a certain amount of money from TEPCO to the treasury to offset the use of the bonds. The government must pass the necessary legislation in the Diet to establish this framework, which is expected to be difficult given that the amount of compensation needed is not yet known.

TEPCO released a video this week of the reactor 3 spent fuel pool that shows debris and other material atop fuel racks in the pool. To see the video, click here for TEPCO's Japanese-language website. A video of the reactor 4 spent fuel pool showed no debris.

The Japanese government plans to advise schools near the Fukushima facility that burying soil contaminated by radiation reduces its radiation level. The government said that burying topsoil 20 inches underground reduced its radiation level by 90 percent.

Chubu Electric Power Co. has agreed to the Japanese government's request to shut down reactors at its Hamaoka nuclear power plant, about 200 miles southwest of Tokyo. The government had asked Chubu to implement safeguards against possible earthquakes and tsunamis. The company began shutdown of Hamaoka 4 on Friday.

Industry/Regulatory/Political Issues

The nuclear energy industry is "going to be held accountable for learning the lessons from Fukushima and for applying them accordingly. I know that we can meet that standard," NEI President and CEO Marvin Fertel said at NEI's annual Nuclear Energy Assembly this week in Washington, D.C. At the same meeting, James Ellis Jr., president and CEO of the Institute of Nuclear Power Operations, called on the industry to seize the opportunity presented by the Fukushima accident and take a leadership position in ensuring safety enhancements are adopted at nuclear energy facilities worldwide.

A U.S. Nuclear Regulatory Commission task force studying lessons learned from Fukushima reported to the commission May 12 that it "has not identified any issues that we think undermine our confidence in the continued safety and emergency planning of U.S. plants." The three-month review likely will result in recommendations to enhance safety and preparedness at nuclear energy facilities, the task force reported. "That said, we do expect we will have findings and recommendations that will further enhance safety," said Charles Miller, who leads the post-Fukushima task force. A longer-term review is scheduled to begin by the time the short-term study is complete.

The NRC has issued a bulletin to U.S. nuclear energy facility operators requesting information on how the plants are complying with requirements to manage the potential loss of large areas of the plant after extreme events. The agency wants to know how the plants ensure their strategies have remained effective over time. "The NRC continues to conclude these strategies can effectively cool down reactor cores and spent fuel pools even if a plant's normal safety systems are damaged or unavailable," the agency said in a press release. "The U.S. nuclear energy industry recognizes that we are accountable to independent oversight authorities and to the American people. We must demonstrate that our facilities are fully prepared to maintain safety, even in cases where we have made protective enhancements that go beyond the NRC's regulatory requirements," said Tony Pietrangelo, NEI's chief nuclear officer and senior vice president. See NEI's press release.
The NRC issued a second temporary instruction (TI 2515/184) requiring the inspection of the availability and readiness of severe accident management guidelines. NRC resident inspectors at each U.S. nuclear energy facility will conduct the inspections over the next three weeks, with support from the agency's regional offices.

Rep. Edward Markey (D-Mass.) yesterday announced the release of a report, "Fukushima Fallout: Regulatory Loopholes at U.S. Nuclear Power Plants." Markey's website describes the report as "a summary of Nuclear Regulatory Commission (NRC) regulatory inadequacies, practices and decisions that impair effective nuclear safety oversight in the United States."

Japan will reconsider its energy policy following the accident at Fukushima Daiichi, the prime minister said. Nuclear energy is considered important to Japan's energy plans, but the government will take new looks at renewable sources and efficiency measures.

A forum held by The Women's Council on Energy and the Environment and Women in Nuclear yesterday in Washington, D.C., addressed the future of nuclear power in the wake of events at Fukushima Daiichi. Panelists included NEI's Leslie Kass, senior director of business and policy programs; Annie Caputo, professional staff member of the U.S. Senate Environment and Public Works Committee; and Ed Lyman, senior scientist with the Union of Concerned Scientists.

Media Highlights

Events at the Fukushima Daiichi nuclear plant in Japan are not expected to "have a major impact on new nuclear plant licensing," NEI President and CEO, Marvin Fertel said May 10 at the Nuclear Energy Assembly in Washington, D.C. Fertel anticipates that four to eight new reactors will be built in the U.S. by 2020. Bloomberg covered the speech.

James Ellis, president and CEO of the Institute of Nuclear Power Operations, called for the creation of a rapid response team that would be dispatched to major nuclear accidents in the United States and other countries. The creation of such a team is one of the lessons of the Fukushima nuclear accident in Japan, said Ellis in a Platts report on Wednesday.

The Associated Press published a report May 10 on Japan's long-term energy policy. Naoto Kan, Japan's prime minister, said the nation will need to "start from scratch," indicating the country will likely reassess a plan to obtain half the country's electricity from nuclear power and will instead promote renewable energy and conservation as a result of its ongoing nuclear crisis.

Reuters reported May 12 that a leak confirmed at Fukushima Daiichi reactor 1 may be an indicator of failed or melted fuel in the reactor and will likely complicate the cleanup of the facility. The exact location of the leak at reactor 1 remains unclear.

New NEI Products

NEI developed several videos this week with industry executives and energy thought leaders on steps that should be taken to enhance nuclear plant safety and finance new nuclear energy projects, as well as the outlook for nuclear energy after Fukushima. To see a list of the video clips, visit NEI's Web page for Nuclear Energy Assembly news coverage or NEI's YouTube channel.

The Week Ahead

The Blue Ribbon Commission on America's Nuclear Future begins its meeting today with updates on Fukushima from the Nuclear Regulatory Commission and the Energy Department. The co-chairs of the commission's three subcommittees will present their draft recommendations. View the webcast here.

Subcommittees of the U.S. House Committee on Science, Space and Technology are conducting a joint hearing today on nuclear energy risk management in view of events at Fukushima Daiichi. Witnesses include Lake Barrett, principal with L. Barrett Consulting LLC; Brian Sherrod, director of the NRC Office of Regulatory Research; John Boice, scientific director of the International Epidemiology Institute; and David Lochbaum, director of the Union of Concerned Scientists' Nuclear Safety Project.

NEI will conduct a webinar on the aftermath of Fukushima for the National League of Cities on May 17.

**CLICK HERE FOR EARLIER NEI UPDATES**

Idaho Samizdat has a really good rundown on the Unit 1 situation, with good quality drawings:

http://djysrv.blogspot.com/2011/05/...campaign=Feed:+blogspot/Yiuo+(Idaho+Samizdat)
 
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Isn't it sad to read about the deaths in the shelters and just generally around the area. Somehow the ones from hypothermia distress me the most, because it seems to mean that no one could get to these people with supplies. Heart attacks I understand in such situations with an elderly population, many of whom might already have heart problems (and might be without their medication). It's good that some people can go home, because one always does better at home. Was it you or a face-to-face friend of mine who discussed findings in the Chernobyl area, where people evacuated from the nuclear area died because they had been removed from their homes and the homes of their ancestors?
 
It was me. I don't know whether you have read any of Kitamura's descriptions of sleeping in the Big Pallette Convention Center, which is his shelter. He is on a floor on cardboard with one polyester blanket, and wishing he had a wool blanket. It's not surprising if people might get hypothermia, especially very thin people. And the diet they are given is very inadequate; pretty much all starch. That can't help.
 
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