ML20023D169

Updated LER 82-008/01X-1:on 820331,HPCI Injection Valve MO-2301-8 Failed to Open in Required Manner.Caused by Missing Wire Jumper Intended to Bypass Motor Operator Torque Switch.Jumper Installed & Valve Tested Satisfactorily

ML20023D169
Person / Time
Site:	Pilgrim
Issue date:	05/09/1983
From:	Vender J BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20023D167	List: ML20023D166 ML20023D169
References
LER-82-008-01X, LER-82-8-1X, NUDOCS 8305190330
Download: ML20023D169 (2)

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U. S. NUCLEAR REGULATORY COMMISSION NRC FOAM 384 87 77) i UPDATE REPORT LICENSEE EVENT REPORT PREVIOUS REPORT DATE 04/14/82 CONTROL 8 LOCK: l 1

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CON'T q7 0 i gu' "J l t l@l 01 s l 01 - l 01 2 l 91 s69 l@lo I, I, li l a l 7 l@l0l5l0191813l@ 74 75 REPORT DATE 80 80 81 DOCKET NUM8ER 68 EVENT DATE EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h O 2 lOn 3/31/82 while conducting Surveillance Test 8.1.13 durinst startuo. HPCI Iniection l ITTT1 iValve MO-2301-8 did not fully open in the required mat,ner. The HPCI System was 1 0 4 ldeclared inoperable and an 'A' Priority Maintenance Reauest was iss. *n invnn r i on erl i

ITTs'l l the cause. No threat to public health and safety is attributed to thin event. I

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 g lA wire jumper, intended to bypass the motor operator torque switch, was found to be l i i l missing. The jumper was installed, the valve tested satisfactorily and the system I i 2 Ireturned to service about eight hours after the event. (Se e ge cae 4 m l lM i I I

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BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION DOCKET NO. 50-293 Attachment to LER 82-008/Ol X-1 j Update Event Description and Probable Consequences On March 31, 1982, while conducting surveillance test 8.I.13, during startup from refuel outage testing, the MO 2301-8 HPCI Injection Valve did not fully open in the required manner. The Priority "A" Maintenance Request was immediately issued to determine the cause. HPCI was declared inoperable, the notification to the NRC via ENS was made.

Cause Description and Corrective Action Investigation showed that a jumper to be used as a bypass of the Limitorque torque switch in the open position was missing. This jitmper was installed, the valve satisfactorily tested and the HPCI system declared operable approxi-mately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after the discovery of the event.

An Engineering Review, in response to I&E Circular 81-13 was performed; the resulta of which are available for NRC review. "ESR #78 Response (Final)" NED 82-688. The results of the investigation were:

1. 10 MOVs were found not to have the "Open" torque switch bypass feature (jumper) installed. Maintenance personnel installed the jumpers on the 10 valves. The installation of these jumpers made the valves conform to the design prints.

2. ESR #78 recommended no design changes in present valve circuitry.