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Fukushima reactor readings raise reheating concern | World news | The Guardian

Concern is growing that the Fukushima Daiichi nuclear power plant in Japan is no longer stable after temperature readings suggested one of its damaged reactors was reheating.

The plant's operator, Tokyo Electric Power (Tepco), said the temperature inside No 2 reactor - one of three that suffered meltdown after last year's earthquake and tsunami - may have reached 82C on Sunday.

Tepco said there was no evidence that the melted fuel inside had reached criticality. The utility reportedly increased the amount of cooling water being injected into the reactor along with a boric acid solution, which is used to prevent the fuel from undergoing sustained nuclear reactions.

Confirmation that the temperature has risen above 80C could force the government to reverse its declaration two months ago that the crippled plant was in a safe state known as cold shutdown.



The fact is that what we're experiencing right now is a top-down disaster. -Paul Krugman
by dvx (dvx.clt ät gmail dotcom) on Sun Feb 12th, 2012 at 01:14:05 PM EST
[ Parent ]
Tepco said it did not know the cause of the apparent temperature rise, but speculated that it might be due to problems with the supply of coolant or a faulty thermometer.

Another day passes, and they are less sure about faulty thermometers... An NHK article quoted here (but now not accessible) was much clearer.

Meanwhile: Nuke dangers nowhere near resolved: [ex-premier] Kan's crisis adviser

by das monde on Mon Feb 13th, 2012 at 10:32:31 AM EST
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