ML19345B854

LER 80-025/03L-0:on 801027,during Power Operation While Completing Repairs on C Charging Pump,A Charging Pump Became Inoperable.Caused by Leak in Weld Joining Sys to Flushing Line.Weld Repaired & Pump Returned to Svc

ML19345B854
Person / Time
Site:	Fort Calhoun
Issue date:	11/14/1980
From:	Gates W, Mueller R OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19345B845	List: ML19345B844 ML19345B854
References
LER-80-025-03L, LER-80-25-3L, NUDOCS 8012020616
Download: ML19345B854 (4)

Text

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NRC PCRM 044

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7 s u ei CCCxETNuusER EVENT DESCAIPTICN AND PAC 8ABLE CoNSECUENCES h .

10 i 21 1 Durina cower operation while comoletino recairs en "C" charoino cumo. "A" charoino 1 i o 13 t I oump become inocerable. Technical Specification 2.2 was implemented and maintenance !

10: 41 I was initiated on "A" charging pumo immediate1v. Technical Soecifications allow this 1 l

FC 1 s l I mode of 00eration for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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4 a 2 ,, .o ai 42 cAusE oEscaipTtCN AND CCA AECTIVE AC*loNS h ,

I 1 6 a ! l "A" charcino cumo discharce header devnleced a small laak in a weld icinine the I i i 1 I system to a fhsino line. The weld was recaired and the cri-n r=+'iraps % o r* e f I

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s i LER~No.80-025

~ 0mana Public Power. District Fort ~Calhoun Station Unit No.1

, Docket No. 05000235 ATTACHMENT NO.1 Safety Analysis- ,

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.The' inservice inspection of the suction an'd relief valves of "C" i

- charging pump was in progress on October'27, 1980.

At approximately 1630 on~10/27/80, charging pumo developed a small leak-in-a weld which connects a flushing line to t.*.e system. "A"  !

charging pump was removed from service for repair and the 24 nour time limit of TechnicalESpecification 2.2. was imple.eented. -

1 The weld was repaired and tested the same day. The "A" charging

pump was. returned 'to service at 2217 hours0.0257 days <br />0.616 hours <br />0.00367 weeks <br />8.435685e-4 months <br /> on October 27, 1980, within

the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> time limit of Technical Specification 2.2.

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LER No.80-025 Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 05000285 l

ATTACHMENT NO. 2 l

l l Corrective Action

! "A" charging pump. weld of the flush line was repaired by grinding i -out the old weld and rewelding using a certified procedure. The line l

was inspected and hydrostatically tested before returning to service.

Pulsation ' dampeners were . installed on "B" and."C" charging pumps in l 1979. Weld fractures have not been a problem on the piping asscciated with these pumps since the modifications. A pulsation dampener was recently installed on "A" _ charging pump. Based on the performance of the other charging pumps with pulsation dacpeners installed, future problems of this type are not anticipated, j l }4l l

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LER No.80-015 Omaha Public Power District d

' Fort Calhoun Station Unit No.1~

Docket No.- 05000285 i ATTACHMENT NO. 3 i Failure Data This is the fifth reportable failure of this type at Fort Calhoun i Station. Incidents that are-related to this failure .were previously documented on LER's78-005, 78-006,78-046 and 80-016, i

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