05000333/LER-1979-039-03, /03L-0 on 790627:while in Shutdown Condition B Loop LPCI Injection Valve Did Not Open in Response to Automatic Signal.Caused by Failure of Torque Switch in Valve Motor Operator.Torque Switch Was Replaced

/03L-0 on 790627:while in Shutdown Condition B Loop LPCI Injection Valve Did Not Open in Response to Automatic Signal.Caused by Failure of Torque Switch in Valve Motor Operator.Torque Switch Was Replaced

ML19225C194
Person / Time
Site:	FitzPatrick
Issue date:	07/23/1979
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19225C192	List: 05000333/LER-1979-039, Forwards LER 79-039/03L-0 05000333/LER-1979-039-03, /03L-0 on 790627:while in Shutdown Condition B Loop LPCI Injection Valve Did Not Open in Response to Automatic Signal.Caused by Failure of Torque Switch in Valve Motor Operator.Torque Switch Was Replaced
References
LER-79-039-03L, LER-79-39-3L, NUDOCS 7907260652
Download: ML19225C194 (2)

LER-1979-039, /03L-0 on 790627:while in Shutdown Condition B Loop LPCI Injection Valve Did Not Open in Response to Automatic Signal.Caused by Failure of Torque Switch in Valve Motor Operator.Torque Switch Was Replaced

Event date:
Report date:
3331979039R03 - NRC Website

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POWER AUTIIORITY OF Tile SUTE OF NEW YORK JAMES A.

FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTAblMENTTOLER 79-039/03L-0 Page 1

of 1

Khile in a cold shutdown condition, during the conduct of Operations Surveillance Test F-ST-35A titled " Containment Cooling Subsystem Logic Functional Test," the "B" loop LPCI inj ection valve (10-MOV-25B) did not open in response to an automatic open signal.

The testing was being conducted to satisfy the requirements of Technical Specifications Appendix A, Table 4.2-2.

The other RilR loop and injection valves, as well as both core spray systems, were operational therefore the event did not represent a significant hazard to the public health and safety.

Investigation revealed failure of the. torque switch in the valves motor ope.ator.

Following replacement of the torque switch assembly, the valve was tested utilizing F-ST-35A, with satisfactory results.

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