Title: “Failure to ensure” thermometer Unit 2 reactor … abnormal circuit
Date: Feb 13, 2012
Tokyo Electric Power Company on August 13, after inspection of the afternoon, and the upper limit of 400 degrees Furikireru beyond the recording thermometer on the bottom of the reactor pressure vessel of Unit 2 of Fukushima Daiichi Nuclear Power Station showed a rise in temperature, abnormal announced that it had shown a number.
TEPCO sees as “almost certainly have failed.” Thermometer, after being exposed to high temperatures in the molten core, had been placed in high humidity environments. [...]
Read the report here
[...] Jiji Tsushin says right before 3PM, the temperature was 342.2 degrees Celsius.
[... Tepco Press Conference...]
Q: The temperature rise in early February – was it related to the instrument failure now?
A: We think so. But we didn’t know at that time whether it was actually a rise in temperature or the instrument failure. The temperature did go down after increasing the water injection.
Q: How reliable is it to judge “recriticality” by xenon-135?
A: We think it is a reliable indicator.
Q: When was 342.2 degrees Celsius recorded?
A: We finished the testing at 2:54PM. So it must be between that time and 3PM. We’ll have to check.
Q: How high did the temperature go? (looking at the graph that was provided)
A: It went overscale, so the graph shows temperatures like that [over 400 degrees Celsius].
Published: February 13th, 2012 at 10:13 am ET