05000281/LER-1980-040-03, /03L-0:on 801114,found Charging Pump Svc Water Pump 2-SW-P10A Developed Low Discharge Pressure of 10 Psig. Caused by Matl Entrained in Water & Being Deposited on Pump Impeller.Pump Disassembled,Cleaned & Returned to Svc

/03L-0:on 801114,found Charging Pump Svc Water Pump 2-SW-P10A Developed Low Discharge Pressure of 10 Psig. Caused by Matl Entrained in Water & Being Deposited on Pump Impeller.Pump Disassembled,Cleaned & Returned to Svc

ML18139A904
Person / Time
Site:	Surry
Issue date:	12/11/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A903	List: 05000281/LER-1980-040-03, /03L-0:on 801114,found Charging Pump Svc Water Pump 2-SW-P10A Developed Low Discharge Pressure of 10 Psig. Caused by Matl Entrained in Water & Being Deposited on Pump Impeller.Pump Disassembled,Cleaned & Returned to Svc 05000281/LER-1980-041-03, /03L-0:on 801112,snubber 2-WFPD-HSS-18 Found to Have Bent rod-eye & Was Declared Inoperable.Caused by Improper Alignment of Pipe Clamp to Snubber.Snubber Replaced 05000281/LER-1980-042-03, /03L-0:on 801115,found Emergency Diesel Generator 3 Failed to Start Manually from Control Room.Caused by Vanes on Air Motor Worn Beyond Acceptance Limits.Vanes Repaired ML18139A902
References
LER-80-040-03L-03, LER-80-40-3L-3, NUDOCS 8012170627
Download: ML18139A904 (2)

LER-1980-040, /03L-0:on 801114,found Charging Pump Svc Water Pump 2-SW-P10A Developed Low Discharge Pressure of 10 Psig. Caused by Matl Entrained in Water & Being Deposited on Pump Impeller.Pump Disassembled,Cleaned & Returned to Svc

Event date:
Report date:
2811980040R03 - NRC Website

text

RC FORM 366

- 77) 61cENSEE EVENT R~PORT U. S.CLEAR REGULATORY COMMISSION CONTROL BLOCK: !-1 _.1,___,__.,__......__..__...,I G) 1 6

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I With the unit at 100% p:>wer, charging pump service water p.nnp 2-SW-PlOA developed DI] I a low discharge pressure of lOPSIG.

This is contrary to T.S. 3.3.A.8.6 and i.B IJIJ I rep:>rtable per T.S. 6.6.2.b(2). The re::lurrlant p.nnp was operational, therefore the D]J I heal th and safety of the p..iblic were mt affected.

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44 47 I The reduced discharge pressure was due to material entrained in the water and being ITD r dep:>sited on the pump's impeller. The p.nnp was disassembled, cleaned arrl returned to III]. I service.

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50-281 REFORI' ID:

80-040/03L-O EVENT DATE: 11-14-80 TITLE:

2-SW-P-lOA It::flJ DIOCHAirn PRESSURE

1.

EVENT DEOCRIPI'ION:

e On November 14, 1980, with the unit at 100% :i;ower, Charging Pump Service water p.mtp 2-SW-~lOA develope:l a low discharge pressure of 10 PSIG.

The re:l.undant service water p.mtp functione:I. as designe:I..

This event is cont:rco::,y to Technical Specification 3.3.A.8.b and is reportable per Technical Specifi-cation 6.6.2.b (2).

2.

PROBABLE CONSEQJEN::ES:

The Charging. Pump service water :FUITIP is use:!. to* supply cooling water to the charging p.:rrnp inte:rmerliate seal and lubricating oil coolers.

The re:iundant p.mtp (_2-SW-P-lOB) was operational, therefore *the health and safety of the p.lblic were not affecte:I..

3.

CAUSE

The rerluce:I. pressure was due to material entrained in the water,an::l being deposite:I. on the pump's :impeller.

4.

IMMEDIATE CORRECTIVE ACTION

The irmnerliate corrective action was to verify the redundant p.lit1p in operation and clean the suction strainer for 2-SW-P-lOA.

5.

SOBSEcm;m' CORRECTIVE ACTION:

The subsequent corrective action was to disassemble and clean the p.mtp.

The pump was teste:i and returne:I. to service within the require:!. time l.unit.

6.

ACTIOO TO PREVENT RECURRE:N::E:;

A Design Change is in progress, as a result of the pipe stress analysis program, which will improve the filtration capabilities of the systan.

7.

GENERIC lMPLICATIONS:

The Design Change will address both units.