Common Sense Canadian

Another close call at Fukushima as stalled Reactor 4 cooling system restarted

PostedJuly 3, 2012 by in International

Read this update from The Japan Times, confirming that the collong system for the badly damaged reactor 4 at the Fukushima-Daiichi Nuclear Plant was successfully restarted Monday after malfunctioning over the weekend, once again bringing the plant to the brink of disaster. (July 2, 2012)

The cooling system for the No. 4 reactor’s hazardous spent-fuel pool came back to life Sunday at the crippled Fukushima No. 1 power plant after emergency repairs succeeded, Tokyo Electric Power Co. said.

The cooling system automatically shut down on Saturday for unknown reasons, allowing the water in the pool to reach 42.9 degrees Sunday. The pool must stay filled to prevent the used rods from burning up.

The cooling system resumed shortly after 3 p.m. The temperature in the pool, which is sitting perilously atop the reactor in a heavily damaged building, was 33.3 degrees when the cooling system failed Saturday morning.

The company believes a part in the cooling system’s emergency power unit caused the shutdown and plans to replace it “soon.”

The pool contains 1,535 fuel assemblies — including 204 unused ones — that could all burn up if the remainder of the building collapses and dumps the water out. The same cooling system also was suspended on June 4.

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