Now, there are only 15 thermocouples left on the Reactor Pressure Vessel of Reactor 2 that are more or less working. Before the accident, there were 31 thermocouples on the RPV monitoring the temperatures, according to Yomiuri Shinbun (3/3/2012).
The thermocouple at the RPV bottom at 0 degree, 69H1, has already been declared failed (after TEPCO tested it...), and now 69H2 at 135 degrees is considered failed, as DC resistance is too low for a properly functioning thermocouple. Now, the thermocouple at 270 degrees, 69H3 is the only one measuring the temperature at the RPV bottom.
The other thermocouple gone bad is 69F3 at the junction of skirt supporting the RPV at 270 degrees.
According to Yomiuri, TEPCO plans to install new thermocouples by the end of July. No information about how.
From TEPCO's handout for the press, 3/3/2012 (reference, in English):
戦争の経済学
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ArmstrongEconomics.com, 2/9/2014より:
戦争の経済学
マーティン・アームストロング
多くの人々が同じ質問を発している- なぜ今、戦争の話がでるのか?
答えはまったく簡単だ。何千年もの昔までさかのぼる包括的なデータベースを構築する利点の一つは、それを基にいくつもの調査研究を行...
10 years ago
1 comments:
"According to Yomiuri, TEPCO plans to install new thermocouples by the end of July. No information about how."
They actually don't know how to do this.
On the physicsforums Tsutsuji translated into English the according parts of the March 2nd Tepco report that is available in Japanese only.
Reading this, you'll note the big number of overwhelming difficulties that have to be solved before to be able to install new instrumentation.
Read the translation here:
First part: http://www.physicsforums.com/showpost.php?p=3795578&postcount=12465
Second part: http://www.physicsforums.com/showpost.php?p=3796935&postcount=12485
After reading this, I believe Tepco's time schedule is just wishful thinking.
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