05000336/LER-1980-034-03, /03L-0:on 801017,turbine Driven Auxiliary Feedwater Pump P-4 Taken Out of Svc to Repair Drain Valve 2-MS-342.Caused by Steam Cut on Valve Seating Surface.Valve Seat Lapped & Disk Repaired

/03L-0:on 801017,turbine Driven Auxiliary Feedwater Pump P-4 Taken Out of Svc to Repair Drain Valve 2-MS-342.Caused by Steam Cut on Valve Seating Surface.Valve Seat Lapped & Disk Repaired

ML20002A765
Person / Time
Site:	Millstone
Issue date:	11/14/1980
From:	Criscione J NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20002A764	List: 05000336/LER-1980-034, Forwards LER 80-034/03L-0 05000336/LER-1980-034-03, /03L-0:on 801017,turbine Driven Auxiliary Feedwater Pump P-4 Taken Out of Svc to Repair Drain Valve 2-MS-342.Caused by Steam Cut on Valve Seating Surface.Valve Seat Lapped & Disk Repaired
References
LER-80-034-03L, LER-80-34-3L, NUDOCS 8011210493
Download: ML20002A765 (1)

LER-1980-034, /03L-0:on 801017,turbine Driven Auxiliary Feedwater Pump P-4 Taken Out of Svc to Repair Drain Valve 2-MS-342.Caused by Steam Cut on Valve Seating Surface.Valve Seat Lapped & Disk Repaired

Event date:
Report date:
3361980034R03 - NRC Website

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DOCKET NUVSER Ga 69 EVENT DATE 74 75 REPORT D ATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h oTg L0uring a routine start-up and with the plant at 10(-3) Der cent cower. the turbino I

g [ driven auxiliary feedwater pump (P-4) was taken out of service to repair drain valve i

q l 2-MS-342. The electric motor driven auxiliary feedwater pumps were verified coerable.,_j g l and the plant was operated in accordance with the Technical Specification Action State-I g l ment 3.7.1.2.

The valve was repaired and the auxiliary feedwater pump returned to I

g i service within 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />. Similar Events 77-13.

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33 36 37 40 48 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lil0j l The valve seating surface for 2-MS-342, drain valve on the steam supply to P-4, was 1

i,,1 j i steam cut resulting in excessive leakage and a potential personnel safety hazard.

The 1

,,,, l valve was removed from service to lap the seat and disk repairing the damace.

The I

g ; valve was returned to service with no leakage.

Valve data: Henry Vogt, 800 lb., 3/4 l

, g i l inch globe valve, HF seat, CR-13 disc.

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S 9 11 12 80 LOSS OF OR OAuACE TO FACILITY Tvet

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68 69 John L. criscione 203-447-1791 NAME OF PREPARER

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