The crisis at the Fukushima Daiichi nuclear power station is approaching a weeks’ duration. The on-site situation remains extremely serious, with glimmers of hope being shrouded by a shadow of deep uncertainty. If you’ve not been following the situation on BraveNewClimate, and want to recap, please read these recent updates:
Japan Nuclear Situation – 14 March updates
Further technical information on Fukushima reactors
Fukushima Nuclear Accident – 15 March summary of situation
Fukushima Nuclear Accident – 16 March update
These are assumed knowledge for understanding the rest of this post. The preparation of the material below was aided greatly by the private advice of my acquaintances in the nuclear engineering field. As predicted yesterday, attention over the last 24 hours has focused on the critical situation with the ponds used for temporary storage of spent nuclear fuel at the individual reactor units, before it is moved to a centralised facility on site. Although this old fuel has lost much of its original radioactivity, the decline is exponential (see this figure) which means that thermal energy must continue to be dissipated for months.
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