Tuesday, August 9, 2011

#Fukushima I Nuke Plant: Heat Exchanger Operational for SFP in Reactor 1

Having the workers run past the super-hot 10-plus sieverts/hr exhaust stack and hurry up the 2nd floor with 5-plus sieverts/hr radiation, TEPCO has managed to install a heat exchanger for the Spent Fuel Pool of Reactor 1 to cool the pool steadily.

One of the workers who installed the heat exchanger there tweeted that he got 10 milisieverts of radiation exposure for the several days of work.

No one knows how hot the pool has been anyway because the instrument is broken since the earthquake on March 11, but TEPCO says the heat exchanger will cool the water to the same level as the water in Reactors 2, 3, and 4.

It's called "keishiki" in Japanese. In English, it's "formality". Cooling the reactors that are likely devoid of melted fuel and injecting nitrogen gas, and cooling the SFP without knowing how hot it is are all part of the "formality" or checklist that TEPCO submit to the government, so the government can support its claim of safety and stability of the situation at Fukushima and tell the residents to go home.

From Yomiuri Shinbun (11:43PM JST 8/10/2011):

東京電力は10日午前、福島第一原子力発電所1号機の使用済み核燃料一時貯蔵プールを安定的に冷やす循環冷却を本格稼働させた。

TEPCO started the heat exchanger for the Spent Fuel Pool in Reactor 1 on August 10 morning to cool the water in the SFP steadily.

 2~4号機のプールでは、既に循環冷却が行われており、事故収束に向けた工程表で来年1月とした目標期限を大幅に前倒しできる。

The heat exchangers for the SFPs in Reactors 2, 3 and 4 are already operational. Steady cooling of the SFP is scheduled to be accomplished in January 2012 in the "roadmap", but TEPCO will succeed in achieving that goal much earlier [if the Reactor 1 SFP heat exchanger works as planned].

 東電によると、1号機のプールには、392体の燃料集合体(燃料棒の束)がある。計器の故障で水温は計測できていないが、定期的に注水しており、「それほど高くない」とみている。循環冷却により、2~4号機と同程度の30~40度に下げられる見込み。

According to TEPCO, there are 392 fuel rod clusters in the Reactor 1 SFP. The temperature of the water hasn't been measured because the instrument is broken, but the water has been injected on a regular basis. TEPCO doesn't think the temperature is very high, and with the heat exchanger it will be brought down to 30 to 40 degrees Celsius, the same level as that of Reactors 2, 3 and 4.

On the side note, Goshi Hosono, PM Kan's assistant and the minister in charge of investigating the Fukushima nuclear accident, will also be in charge of the new organization to support electric power companies to pay damages in nuclear accidents. The law to create the organization passed both Houses in the Diet. Conflict of interest, Mr. Hosono?

4 comments:

STeVe the JeW said...

"Conflict of interest, Mr. Hosono?"

not really... his interests and TEPCO's perfectly coincide.

Anonymous said...

Just take a good look at the US Gulf of Mexico Oil Spill program for repayment. If citizens do not have documentation of damages and previous value--claim denied. Also property values -- well lets say they are not what they used to be. Hope Japan institutes a fair value repayment effort as well as health related insurance program. US has refused to recognize any health damage from hydrocarbons (Valdez Crud lung/cough)--NO PROOF, even tho a high % of deaths and health issues with persons who were contaminated.

Anonymous said...

"The temperature of the water hasn't been measured because the instrument is broken, .. but the water has been injected on a regular basis."

TEPCO's way of saying, 'While installing the water injection system for Unit 1 we discovered very high radiation levels [months ago]. Because of those levels we decided not to measure the temperature of the SFP. We will call the instrument "broken". Thank you.'

Peter Shawn said...

Nice post!
We supply fin tubes. we wonder whether you will have finned tube request during your project?

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