JAPAN | Quake damage to turbine blades found at Tokai

Posted on July 14, 2011

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JAPAN | NHK | 13 July 2011

Damage to turbine blades, apparently caused by the March 11th earthquake, has been found at a nuclear power plant in Ibaraki Prefecture, eastern Japan.

The Tokai Daini plant, about 100 kilometers north of Tokyo, automatically shut down in the quake. The operator of the plant, Japan Atomic Power Company, has been checking the plant closely since May in a regular checkup scheduled to last 6 months.

It says it discovered friction marks on the blades and other parts of the reactor’s turbines.

The company believes the damage was caused by the March 11 quake as similar marring had been reported in another plant in Niigata Prefecture in the wake of an earthquake in 2007.

The utility says some parts were also found missing from a device that injects coolant into the reactor. It also discovered cracks in equipment attached to the upper parts of the reactor.

It says it is investigating whether those defects were also caused by the March quake.

In the giant quake, the Tokai Daini plant lost its outside power sources, and had to rely on emergency generators until regular power returned.

Earlier this month the government nuclear safety body found the level of quake-resistance of the electrical equipment at the plant was below the standard set by power companies.

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Posted in: JAPAN