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Japan:TEPCO to test run cooling system for No.4 reactor

Sunday, July 31, 2011

Laaska News  July 31,2011
The operator of the damaged Fukushima Daiichi nuclear power plant is set to test run a system to cool a spent fuel storage pool at the No.4 reactor as early as Sunday.

The pool holds 1,535 fuel rods, the most for any of the plant’s reactors. A hydrogen blast on March 15th damaged a wall supporting the pool. The temperature of the pool water remained high at 86 to 87 degrees Celsius on Friday.

Tokyo Electric Power Company began reinforcing the wall with steel pillars and concrete in late May. It also started setting up a cooling device with a heat exchanger in mid-July. This is designed to establish a circulatory cooling system that pumps water out of the pool, cools the water, and returns it to the pool.

The work on strengthening the wall and setting up a cooling system ended on Saturday. Tokyo Electric Power hopes to test run the cooling system as early as Sunday and start full operation if no problem occurs.

TEPCO intends to reduce the temperature of the pool water to around 30 to 40 degrees within one month.

A similar cooling system is in place for spent fuel rod pools at the No.2 and No.3 reactors. TEPCO wants to test run a cooling system for the No.1 reactor no later than early August.

 

NHK.

Laaska News.
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