This is the current status of nuclear safety in Fukushima Daiichi nuclear plant on the 15th of March reported by IAEA.

At the moment of the explosion of rector 4, the level of radioactive shot up to 400mm Sv however with the latest monitoring in the same day it went down to 0.6mmSv.

Japan is working on it, managing it despite of its difficulty and uncertainty.

Keep on eye on the report from IAEA.