Dateline Tokyo for March 20th, 2011, as reported here by Kyodo News:
Meanwhile, a total of 40 tons of seawater was pumped into the spent fuel tank of the No. 2 unit, using a makeshift power source.
The radiation level inside the plant is on a declining trend. At about 0.5 kilometer northwest from the No. 2 reactor, the level dropped to 2,830 microsievert per hour as of 4:30 p.m., compared to 3,443 microsievert per hour at 2 p.m. Saturday.
In millisieverts, the level has dropped from 3.443 mSv/hour to 2.830 mSv/hour according to this report. At this lower rate it would take just over one week if continuously present to be exposed to a lifetime's worth of normal radiation at the location specified.
Any volunteers?
