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Subject Fukushima-Daiichi .. "“likely the largest radioactive noble gas release in history”

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Original Message There it is. Bigger than Chernobyl.

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Total releases greater than Chernobyl

The results obtained for the total release of Xe-133 was 15.3 EBq (uncertainty range 12.2-18.3, EBq – 1018 Bq), more than 2 x total release from Chernobyl (Chernobyl total was 5.2 EBq) and “likely the largest radioactive noble gas release in history”. This took place between 11 and 15 March 2011. In fact, the release is greater than the entire estimated Xe-133 inventory of the Fukushima Dai-ichi nuclear plant, and is explained by the decay of I-133 (half-life 20.8h) into Xe-133. There is strong evidence that Xe-133 release started before the first active venting was made, possibly from structural damage to reactor components and/or leaks due to excessive pressure inside the reactor.

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