ML19225C434

LER 79-026/03L-0 on 790708:while Performing Surveillance Test 8.7.4.4,MSIV Timing,Msiv A-203-ID(inboard) Closed within 2.6-s.Caused by Leaking Nipple in Hydraulic Sys on Valve Operator.Leak Repaired & Hydraulic Sys Refilled

ML19225C434
Person / Time
Site:	Pilgrim
Issue date:	07/25/1979
From:	Fulton J BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19225C433	List: ML19225C432 ML19225C434
References
LER-79-026-03L, LER-79-26-3L, NUDOCS 7907300312
Download: ML19225C434 (1)

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[O 2 l At 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> on July 8, 1979 while performing nurveillance tent 8.7.4.4, MSIV l q7) l Timing, MSIV A-203-ID (InhOard) closed within 2.6 seconds. This is outside O 4 l the tolerance specified in Table 3.7.1 of Technical Specificat ions (> 3.5 sec.f.5.5 l 0 ,, Lsec.) A priority "A" Maintenance Requent was innued and a reactor shutdown l 0 c l init iated to ef fect repairn. l I

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[Ljh 43 lAl5 44 47 CAUSE DESCalPTION AND CONNECTIVE ACTIONR h i o Investigation revealed that the cause of this event was a leaking nipple in the hydraullic li j i j j synten on the valve operator. The leak was repaired, the hydraulic syst em refilled , j j

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