Following up this article ..2 Sv/h from leaked water
According to plant parameter data of Tepco, the water level of skimmer surge tank has been decreasing very rapidly since around 1/30/2012.
It has been in the decreasing trend since the beginning of this year for some reason.
It has been slowly decreasing, but it picked up on 1/20/2012.
However again, it started falling off from 1/30/2012.
Tepco asserts it’s because a part of the pool was damaged by frozen water. Whatever the reason is, there is a major damage to reactor 4.
Iori Mochizuki