March 14, 2011

Radiation Chart


IAEA report-

Japanese authorities also today informed the IAEA at 04:50 CET that the spent fuel storage pond at the Unit 4 reactor of the Fukushima Daiichi nuclear power plant is on fire and radioactivity is being released directly into the atmosphere.

Dose rates of up to 400 millisievert per hour have been reported at the site. The Japanese authorities are saying that there is a possibility that the fire was caused by a hydrogen explosion.

UPDATE: At 00:00 UTC on 15 March a dose rate of 11.9 millisieverts (mSv) per hour was observed. Six hours later, at 06:00 UTC on 15 March a dose rate of 0.6 millisieverts (mSv) per hour was observed. These observations indicate that the level of radioactivity has been decreasing at the site.

As reported earlier, a 400 millisieverts (mSv) per hour radiation dose observed at Fukushima Daiichi occurred between units 3 and 4. This is a high dose-level value, but it is a local value at a single location and at a certain point in time.



Sievert metric radiation unit at wikipedia

* 1 Sv (Sievert) = 100 rem
    * 1 mSv = 100 mrem = 0.1 rem
    * 1 μSv = 0.1 mrem
    * 1 rem = 0.01 Sv = 10 mSv
    * 1 mrem = 0.00001 Sv = 0.01 mSv = 10 μSv

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