Fukushima Daiichi No2 reactor thermometer broken?
One of the thermometers inside of the No2 reactor of TEPCO’s Fukushima Daiichi plant has been indicating rising temperature for this past week, and worrying many of us. Here’s what NHK news reports.
TEPCO’s investigation showed that the troubled thermometer has been indicating an unusual value in its electric current resistance, which suggests that one of the wiring may have been disconnected, thus the device is most likely broken.
The troubled thermometer temperature has risen to over 80°C on the 12th at noon, then to 94.9°C on the 13th at noon. On the other side, however, the other two thermometers in the No2 reactor, which are located about the same height as the troubled one, the temperature went down to 33°C.
Suspecting the thermometer malfunctioning, TEPCO tested the thermometers by letting the electricity through them to check the resistance. The troubled one indicated 1.7 times more resistance than the other two, which suggests thermometer malfunction due to a disconnected wire.
TEPCO will use another method before confirming the thermometer malfunctioning, and they maintain the same amount of water injection to the reactor under a careful observation.
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