- Joined
- Jul 26, 2003
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:
NHK report on the Unit 3 Temperature Rise and Actions Taken in Consequence:
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)