ML19246C129

LER 79-037/03L-0 on 790621:while Conducting Operational Surveillance Test F-ST-1B,inboard MSIV 29-AOV-80B Required 5.8-s to Reach Full Closed Position.Caused by Failure of Seals on Hydraulic Speed Controls Associated W/Valve

ML19246C129
Person / Time
Site:	FitzPatrick
Issue date:	07/20/1979
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
ML19246C128	List: ML19246C127 ML19246C129
References
LER-79-037-03L, LER-79-37-3L, NUDOCS 7907230292
Download: ML19246C129 (2)

Text

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POWER AUT110RITY OF THE STATE OF NEW YORK JAMES A. FIT PATRICK NUCLEAR POWER PLANT DOCKET NO. 50-3:',

ATTACllMENT TO LER 79-037/03L-0 Page 1 of 1 While in a cold shutdown condition, during the conduct of Operations Surveillance Test F-ST-1B titled "MSIV Fast Closure Test (ISI)", inboard MSIV 29-A0V-80B required 5.8 seconds to reach the full closed position.

Technical Specifications Appendix A, Table 3.7-1 requires that this valve close in 3 to 5 seconds. Surveillance testing of the other MSIV in the same main steam line, as well as the MSIV's in the other three main steam lines was satisfactory. Therefore, the event did not represent any signif-icant hazard to the public health and safety.

Investigation revealed failure of the seals on the hydraulic speed controls associated with the valve. Repair and reassembly has not been completed at this time however, when repairs are completed proper operation of the valve will be demonstrated by satisfactory performance of F-ST-1B.

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