05000366/LER-1980-145-03, /03L-0:on 801029,standby Svc Water Pump Flow & Dynamic Head Data Found Out of Compliance W/Asme Code Section 11,Table IWP-3100-2.Cause Not Stated.Corrective Maint Performed & Pump Retested

/03L-0:on 801029,standby Svc Water Pump Flow & Dynamic Head Data Found Out of Compliance W/Asme Code Section 11,Table IWP-3100-2.Cause Not Stated.Corrective Maint Performed & Pump Retested

ML19345B787
Person / Time
Site:	Hatch
Issue date:	11/26/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345B782	List: 05000366/LER-1980-145, Forwards LER 80-145/03L-0 05000366/LER-1980-145-03, /03L-0:on 801029,standby Svc Water Pump Flow & Dynamic Head Data Found Out of Compliance W/Asme Code Section 11,Table IWP-3100-2.Cause Not Stated.Corrective Maint Performed & Pump Retested
References
LER-80-145-03L, LER-80-145-3L, NUDOCS 8012020507
Download: ML19345B787 (2)

LER-1980-145, /03L-0:on 801029,standby Svc Water Pump Flow & Dynamic Head Data Found Out of Compliance W/Asme Code Section 11,Table IWP-3100-2.Cause Not Stated.Corrective Maint Performed & Pump Retested

Event date:
Report date:
3661980145R03 - NRC Website

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LICENSEE EVENT REPORT CONTnol DLoCK: l l

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6 60 G1 DOCKET NUMBER 68 EJ EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEoUENCES h lOTTlIDurina normal power operation, surveillance was beina performed on the 1

lOlarl standby service water pump as part of the operability test on Emergency I 10141ID/G "B" which had been previously taken out of service for preventative l

l O l 51 pnai ntenance.

This test revealed that the pump flow and dynamic head I

. i O lc ] Idata would not meet the associated criteria set forth 'in ASME code sect.

I 10171 l11 Table IWP-3100-2.

There were no effects upon nublic li n a l t h and l

10181Isafety.

This is a re.petitivo occorronen-Refnrence R0 report #50-321/1980-71 DE CO E SUSC E COMPONENT CODE SUBC dF SU E

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lJ l1 l0 l5 lg 33 34 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1110 ] I Upon dis covery of the pumo's failure to deliver the reauired flow the I

lililI pumn was taken out of service for investigation.

The redundant source I

li 121 l of cooling water for D/G 1B (HNP-1 PSW system) was proven operable and l

lil3ll available per Tech Specs 3.7.1.2.

Corrective maintenance was performed l li14.1I and the pump was retested satisfactorily and returned to service.

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LER f:

50-366/1980-145-Licensee.:

Georgia Power Company Facility Name:

Edwin I.

Hatch Docket f:

50-366

Narrative

Report

'for LER 50-366/1980-145 During normal' power operation surveil'1ance was being performed on the standby service water pump as-part of the operability test on Emergency D/G 1B.

'D/G 1B had been previously taken out of service for preventative maintenance.

This test revealed that the pump flow a,nd dynamic head data would not meet-the associated criteria set forth in ASME code section II IWP-3100-2.

Upon-discovery

.o f this

event, the pump was declared inoperable and the redundant source of caoling water for D/G 1B (HNP-1 PSW System) was proven operabic per Tech Specs section 3.7.1.2.

Investigation revealed that the valves (F401A & F402A) that pJ crosstic the standby service water pump discharge and the-HNP-1 PSW supply-to-D/G 1B piping were discovered partially open.and subsequently closed by operations-personnel just

. prior to. the - performance of this test.

Since it could not be determined how long the crosstie valve had been in the par-tially. open position, it was decided to acquire new reference data by repeating the test with the valves in the. correct configuration (locked closed).

As the pump again failed to deliver the rated

flow, the pump was then pulled for inspection and/or corrective maintenance.

Initial inspection did not indicate wear o f the. degree that would cause' pump failure although some wear was evident on the inside. diameter of the pump bowl assembly.

It was concluded upon discussion with the pump vendor to " cleanup" the inside diameter-of the pump ' bowls and i n s t a,11 oversized impeller wear rings.

The new wear ring size was specified by the vendor in order to achieve the optimum running cicarance between the inside diameter of the ' bowl and the impeller wear rings (DCR 80-407).

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Upon. completion. of the fix, the pump was retested satisfac-torily and returned to service.

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