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Tepco Says Water Temperature at No. 4 Spent-Fuel Pool Declines

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Aug. 1 (Bloomberg) -- Tokyo Electric Power Co. said the water temperature in a spent fuel pool of the No. 4 reactor at its crippled Fukushima Dai-Ichi nuclear station dropped after starting a cooling system yesterday.

Water temperature in the pool fell to 63 degrees Celsius (145.4 degrees Fahrenheit) as of 8 a.m. today after the utility began a test run of the system, Junichi Matsumoto, a general manager at the utility, told reporters in Tokyo today. The temperature was 86 degrees Celsius when Tokyo Electric started it yesterday, according to a statement on its website.

The utility known as Tepco began running a circulating cooling system on the No. 2 and No. 3 spent fuel pools in May and June after the March 11 earthquake and tsunami knocked out power lines and backup generators, leading to the failure of cooling systems at the station. Tokyo-based Tepco plans to operate a similar cooling system at the No. 1 spent fuel pool early this month.

The cooling system at the fuel pool of the No. 4 reactor “is running well,” Matsumoto said. The water temperature of the pool at the No. 4 reactor may fall to about 40 degrees Celsius in a few days, Matsumoto said.

To contact the reporters on this story: Tsuyoshi Inajima in Tokyo at tinajima@bloomberg.net

To contact the editor responsible for this story: Amit Prakash in Singapore at aprakash1@bloomberg.net

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