Saturday, February 11, 2012

#Fukushima Reactor 2 RPV Temperature: 79.1 Degrees Celsius as of Noon, February 12, 2012

(UPDATE: The temperature exceeded 82 degrees Celsius as of 2:20PM February 12, 2012.)


Mainichi Shinbun (2/12/2012 1:54PM):


TEPCO announced that one of the thermometers at the bottom of Reactor 2 Pressure Vessel at Fukushima I Nuclear Power Plant was showing 79.1 degrees Celsius as of 12 noon on February 12. It is the highest temperature since the "cold shutdown state" declaration in December 2011. Considering the margin of error, if the temperature exceeds 80 degrees, it would violate the definition of "cold shutdown state". TEPCO thinks the instrument failure is possible, but will increase the amount of water injected into the reactor.


Temperature at the bottom of the Reactor 2 RPV has been trending up since the beginning of February. It reached 73.3 degrees Celsius at 7AM on February 6. TEPCO increased the amount of water to be injected into the RPV by 3 cubic meters (tonnes)/hour to 13.5 cubic meters/hour on February 7, which lowered the temperature to about 64 degrees Celsius at one time. But the temperature resumed the up-trend, and reached 73.3 degrees Celsius at 9PM on February 11. The company increased the amount of water by 1 cubic meter/hour to 14.6 cubic meters/hour, but so far there hasn't been any effect. The amount will be increased by another 3 cubic meters [to 17.6 cubic meters/hour] in the afternoon.

Other two locations at the bottom of the RPV show the temperatures that continue to go down, in the mid 30s.

Want to bet if TEPCO will say in the evening press conference, "It's instrument failure after all"?


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