ML19260D671

LER 80-008/03L-0:on 800109,while Performing Surveillance, Core Spray Valve 14-MOV-12B Failed to Open as Required. Caused by Torque Switch Not Being Bypassed for Sufficient Time Period.Adjusted Torque & Limit Switches

ML19260D671
Person / Time
Site:	FitzPatrick
Issue date:	02/08/1980
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
ML19260D667	List: ML19260D666 ML19260D671
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8002110565
Download: ML19260D671 (2)

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14 75 REPORT D ATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h s o. ; .I During normal operation, while performing surveillance to satisfy l o a T.S. 3.5.A.3, core spray injection valve 14-MOV-128 failed to open l Lo_ a l as requi red. Since the valve was restored to operable status 1 o s l approximately 2 1/2 hours later, no signi ficant hazard existed. l o c l See Attachment for Details. I O 7 l o 8 l 80 7 8 9 SYSTEY CAU5E CAUCC C O'.' P. VALVE CCCE COCE SUBCODE CC'4 Or.ENT CODE SUBCODE SUSCODE 7

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, POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 80-008/03L-0 Page 1 of 1 s . .

During normal operation, while performing operations surveillance test, F-ST-3D, titled " Core Spray MOV Operability Test," to satisfy the requirements of Technical Specifications, Paragraph 3.5.A.3, the "B" loop injection valve (14-M0V-128) failed to open as required. The surveillance testing was being conducted because the "B" RHR loop had been administratively declared inoperable. Since both the "B" core spray system and "B" RHR loop were inoperable as a result of this event, a plant shutdown as required by Technical Specifications, Paragraph 3.5.A.6 would have been required within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

A check of the torque and limit switch adjustment on the valve operator revealed that the torque switch may not have been bypassed for the entire high torque period when the valve is being moved off of its fully closed seat. This improper torque switch adjustment would result in tripping of the valve operator on high torque during the initial stage of the valve opening cycle. Following readjustment of the open bypass contact rotor to permit proper operation of the valve, the valve was restored to a fully operable status approximately two and one-half hours after the initial failure.

The event did not represent a significant ha::ard to the public health and safety.

1943 244 4