IAEA update April 4-11

"NISA have advised the IAEA that TEPCO have been given permission by the Government of Japan to discharge 10 000 ton of low level contaminated water from their radioactive waste treatment facility to the sea. This is in order to have sufficient capacity to store highly contaminated water found in the basement of the Unit 2 Turbine Building.

In addition TEPCO will discharge 1 500 ton of low level contaminated water in the sub-drain pit for Units 5 and 6 to prevent the water in the pit from leaking into the reactor buildings and potentially damaging safety-related equipment.

TEPCO has estimated that the potential additional annual dose to a member of the public would be approximately 0.6 millisieverts (mSv), if they ate seaweed and seafood caught, from near the plant, every day for a year.

The temperature at unit 1 is a bit high 

On 4 April the IAEA monitoring team made measurements at 7 locations at distances of 30 to 41 km South and Southwest of the Fukushima nuclear power plant. The dose rates ranged from 0.7 to 12.5 microsievert per hour. At the same locations, results of beta-gamma contamination measurements ranged from 0.1 to 2.0 megabecquerel per square metre."

For the full update go to IAEA