Upward revisions to radiation estimates

Upward revisions of the scale of the radiation damage continue to be released.  Here is a summary of a few from the past several days.

Yesterday the Japanese government reported to the IAEA that reactors 1-3 all experienced a nuclear fuel “melt-through” in the hours and days after the tsunami on March 11.  The condition is characterized as worse than a total core meltdown.

On June 6 Japan’s regulatory body, Nuclear and Industrial Safety Agency (NISA), revised upward its’ estimates of the total radiation released from the plant.  Their new value (770,000 terabecquerels) is twice that of their previous assessment and falls more in line with the amount (630,000 terabecquerels) originally assumed by the Japan Cabinet Office’s Nuclear Safety Commission of Japan (NSC).

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