- Joined
- Jul 26, 2003
Another ongoing story is the fact that arrangements are starting to be made to return evacuees to their homes, if they want to go.
JAIF:
http://www.jaif.or.jp/english/news_images/pdf/ENGNEWS01_1318306724P.pdf
After Step 2 is complete, consideration will be given to removing the evacuation order for "restricted areas" and "deliberate evacuation areas".
and NHK is reporting this as well.
Additionally, decontamination of areas labelled as high contaminated has started.
This is where the IAEA's recommendations about what to do with "waste" are important. There is such a thing as overdoing it here and making your problem bigger than it needs to be, which appears to be what is going on in the next story.
3.99 microSieverts an hour is just not that big, although indeed, one of the monitors one the plant periphery at Fukushima Daiichi is at about that level. It isn't that big at that particular point either. What needs to be done is to remove the dirt from directly under the downspout, where, of course, cesium has concentrated. All the runoff from a large school roof area has gone there. It would be smarter to measure stuff before going to a wholesale removal of trees, bushes, and land, most of which will be quite innocuous, as they are doing with the ditches.
In fact, I am not getting why they need to remove the trees at all-they should just clean up the leaves promptly when they fall.
The IAEA thinks the Japanese are overdoing it, and Reuters read their report the same way I did:
Reuters]/b]
http://af.reuters.com/article/worldNews/idAFTRE79D2FM20111014
The Mainichi Times has a personal story about the Fukushima decontamination:
http://mdn.mainichi.jp/mdnnews/news/20111018p2a00m0na020000c.html
There is more to the story; some of it is quite sad.
Notice that there is another contaminated rain gutter in this story. Cleaning gutters and ditches will be important. Learning what to decontaminate, and how to do that will be a concern in the near future.
JAIF:
http://www.jaif.or.jp/english/news_images/pdf/ENGNEWS01_1318306724P.pdf
After Step 2 is complete, consideration will be given to removing the evacuation order for "restricted areas" and "deliberate evacuation areas".
and NHK is reporting this as well.
Revising evacuation status
Japan will begin discussions earlier than originally planned on redefining which areas are subject to evacuation orders.
Such discussions became feasible on Monday when the government and Tokyo Electric Power Company, at their monthly progress review, revised their timetable for bringing the nuclear crisis under control.
According to the revised plan, the second stage, involving a state of cold shutdown of the reactors at the Fukushima Daiichi nuclear power plant, will be achieved by the end of this year, one month earlier than originally targeted.
The revised timetable says temperatures around the Numbers 1, 2, and 3 reactors are less than 100 degrees Celsius, and that the amount of radiation being emitted has dropped to about 100 million becquerels per hour.
This is about one 8-millionth of the level when the crisis began, and about half that of a month ago.
It also says additional radiation exposure in areas just outside the plant is estimated at 0.2 millisieverts per year at the most.
But many problems remain, as the government has yet to announce the details of the decontamination work that must be done in areas affected by the evacuation orders.
Monday, October 17, 2011 20:20 +0900 (JST)
Additionally, decontamination of areas labelled as high contaminated has started.
Fukushima City begins decontamination work
Fukushima City has launched a massive campaign to clean up radioactive materials, with the ultimate goal of decontaminating all homes and public facilities.
The city is located about 60 kilometers from the disaster-stricken Daiichi nuclear power plant.
Decontamination work began on Tuesday morning in the Onami district, where radiation levels are relatively high.
Prime Minister Yoshihiko Noda was on hand for about 20 minutes to inspect the work in Onami.
A team of professional workers used water jet cleaners to clean roofs and ditches. They also cut away vegetation in gardens and removed a layer of top soil.
Fukushima City's ultimate goal is to decontaminate 110,000 households, public facilities, and roads near schools by the end of fiscal 2012.
The city plans to ask residents and volunteers to help clean up areas where radiation levels are not too high.
Securing the necessary manpower and space to store radioactive waste are among the key challenges.
Tuesday, October 18, 2011 12:16 +0900 (JST)
This is where the IAEA's recommendations about what to do with "waste" are important. There is such a thing as overdoing it here and making your problem bigger than it needs to be, which appears to be what is going on in the next story.
High radioactivity measured at Tokyo school
A radioactivity level higher than that of areas near the crippled Fukushima nuclear power plant has been detected at a Tokyo elementary school.
A level of 3-point-99 microsieverts per hour was observed 5 centimeters above ground just beneath a rainwater pipe on Monday at the school in Tokyo's Adachi Ward. Radiation levels in Fukushima City about 60 kilometers from the plant were around 1 microsievert per hour on Monday. The ward is about 210 kilometers from the plant.
Ward authorities plan to remove soil and trees from the school area and measure radiation in ditches at about 800 locations including schools, parks and other public facilities.
The school's principal says he was stunned to hear about the radiation and cancelled physical education classes and other activities in the schoolyard for the day.
Tuesday, October 18, 2011 17:11 +0900 (JST)
3.99 microSieverts an hour is just not that big, although indeed, one of the monitors one the plant periphery at Fukushima Daiichi is at about that level. It isn't that big at that particular point either. What needs to be done is to remove the dirt from directly under the downspout, where, of course, cesium has concentrated. All the runoff from a large school roof area has gone there. It would be smarter to measure stuff before going to a wholesale removal of trees, bushes, and land, most of which will be quite innocuous, as they are doing with the ditches.
In fact, I am not getting why they need to remove the trees at all-they should just clean up the leaves promptly when they fall.
The IAEA thinks the Japanese are overdoing it, and Reuters read their report the same way I did:
Reuters]/b]
http://af.reuters.com/article/worldNews/idAFTRE79D2FM20111014
IAEA urges Japan to be less conservative in nuclear cleanup
Fri Oct 14, 2011 12:47pm GMT
By Shinichi Saoshiro
TOKYO (Reuters) - Japan should be less conservative in cleaning up vast areas contaminated by radiation from the world's worst nuclear disaster since Chernobyl, a team of visiting U.N. nuclear experts said on Friday.
...
Japan's environmental ministry has said the method of scraping off surface soil could result in about 29 million cubic metres of radioactive waste that needs to be disposed, and finding a final storage place for the debris is seen as a major headache for the government.
"Where applicable, there are methods that do not require storage. There are about 60 remediation technologies available. We are taking the advice from our experiences in Chernobyl, where a lot of mistakes were made," Varjoranta said
Japan's environmental ministry has said the method of scraping off surface soil could result in about 29 million cubic metres of radioactive waste that needs to be disposed, and finding a final storage place for the debris is seen as a major headache for the government.
"Where applicable, there are methods that do not require storage. There are about 60 remediation technologies available. We are taking the advice from our experiences in Chernobyl, where a lot of mistakes were made," Varjoranta said
The Mainichi Times has a personal story about the Fukushima decontamination:
http://mdn.mainichi.jp/mdnnews/news/20111018p2a00m0na020000c.html
Decontamination work underway in Fukushima, but some choosing not to return
A worker, front, uses heavy machinery to remove vegetation from Yoshiharu Suda's yard, while another man at the back works to decontaminate the roof of his house in the Onami district in the city of Fukushima, on Oct. 18. (Mainichi)
FUKUSHIMA -- District-wide radiation decontamination work got underway on Oct. 18 in the Onami district of Fukushima city, but regardless, many families are choosing to have their children live elsewhere to avoid exposure to radiation.
...
The highest radiation at Suda's home was near a rain gutter, at 34 microsieverts per hour. When private sector workers hired by the city came to get measurements on Oct. 17, a measuring device that the city had prepared couldn't measure high enough, and one of the private sector workers' measuring devices had to be used.
On Oct. 18, private sector workers wearing rain jackets, helmets and goggles used a pressure washer to clean from high places to low, starting with the roof and rain gutters. Garden trees that Suda's 88-year-old mother Satai had tended for half a century were all removed. There was still worry about how much the radiation levels would actually fall after the work was all done.
There is more to the story; some of it is quite sad.
Notice that there is another contaminated rain gutter in this story. Cleaning gutters and ditches will be important. Learning what to decontaminate, and how to do that will be a concern in the near future.
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