Title: (Updated) TEPCO Press Conference on Reactor 2 RPV Temperature
Date: Saturday, February 11, 2012
(Updated) TEPCO Press Conference on Reactor 2 RPV Temperature
(There are many reporters this time…)
Asahi Shinbun’s reporter asked how high exactly the temperature went, as the graph seemed to show the spike above 90 degrees Celsius.
Matsumoto answered the graph is plotting all the 1-second readings from the digital display, not visually verified by the workers. The official reporting is every 6 hours, the reference reporting is every hour.
Q: Why has the temperature started to vary widely since noon?
A: We don’t quite know.
Q: When will you get back to the normal operation under the safety regulations?
A: To do it, we have to make sure it is the instrument failure.
Q: Does the instrument failure have to do with the variance?
A: It’s not that the instrument failure started today, but it may have started late January when this thermometer started to behave differently from the other two at the bottom of the RPV.
Q: Why did you start mentioning “instrument failure” only when the temperature started to approach 80 degrees Celsius?
A: We didn’t think it was behaving erratically. The variance of 1 degrees was understood. The trend changed at the end of January. Also, the temperature remained high as more water accumulate inside the RPV, therefore the instrument failure more likely.
A: We want to see if it is possible to have the instrument failure where the temperature drops, instead of going up.
A: The Containment Vessel is still hot and humid, so we have to make sure the other instruments [with temperatures remaining in the 30s?] are working properly. At this point, we don’t have better alternatives.
Q: Why are you increasing the amount of water if you think it is the instrument failure? What do you think of the safety regulations?
A: We have always informed the NISA and followed the safety regulations. (No answer on why they are increasing water.)
Read the full report here
Published: February 12th, 2012 at 8:21 am ET
- Tepco: 91.2°C at Reactor No. 2 — Reporter suspicious of instrument failure claim since it’s steadily rising in small increments February 12, 2012
- Reporter asks if Tepco test caused device to break — Nuclear experts doubt foregone conclusion of instrument failure at Reactor No. 2 February 13, 2012
- Off the Scale: Reactor No. 2 temperature exceeded 400°C — Tepco says device broken — Reporter asks about recriticality February 13, 2012
- Asahi: Reactor No. 2 temperature stays high despite Tepco’s stabilization effort — Was back up to 72°C February 8, 2012
- NHK: More than half of thermometers in Reactor 2 not working — Tepco will start ‘start measuring temperatures again by late July’ — High humidity inside reactor blamed June 2, 2012