05000285/LER-1980-025-03, /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

/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: 05000285/LER-1980-025, Forwards LER 80-025/03L-0 05000285/LER-1980-025-03, /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
References
LER-80-025-03L, LER-80-25-3L, NUDOCS 8012020616
Download: ML19345B854 (4)

LER-1980-025, /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

Event date:
Report date:
2851980025R03 - NRC Website

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LER~No.80-025

~ 0mana Public Power. District Fort ~Calhoun Station Unit No.1 Docket No. 05000235 ATTACHMENT NO.1 Safety Analysis-

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

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- 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 l

Docket No. 05000285 ATTACHMENT NO. 2 l

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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

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LER No.80-015 Omaha Public Power District

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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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