Special Inspection at MO Nuke

Wednesday, September 23, 2015 @ 02:09 PM gHale

A special inspection is under way at Ameren Corp.’s 1,190 MW Callaway nuclear plant in Missouri to review the failure of control valves following a reactor shutdown Aug. 11.

Three of four control valves that regulate water flow to steam generators in the reactor failed to work properly following the shutdown, said officials at the Nuclear Regulatory Commission (NRC).

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NRC inspectors will spend a week on site investigating issues relating to testing, maintenance, design and corrective actions of the valves.

A report with the team’s findings will release within 45 days of the end of the inspection.

The plant also experienced a one-day shutdown in July.

A damaged gasket was the cause of a leak and workers repaired it, said Barry Cox, senior director of nuclear operations at Callaway.

The steam leak occurred in the reactor coolant system within the containment building at the nuclear plant.

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