05000247/LER-1981-013-01, /01T-0:on 810520,low Flow from Two Motor Driven Auxiliary Boiler Feed Pumps at Hot Shutdown Discovered During Surveillance Testing.Caused by New Trim in Generator Level Control Valves Restricting Auxiliary Feedwater Flow

/01T-0:on 810520,low Flow from Two Motor Driven Auxiliary Boiler Feed Pumps at Hot Shutdown Discovered During Surveillance Testing.Caused by New Trim in Generator Level Control Valves Restricting Auxiliary Feedwater Flow

ML20004E929
Person / Time
Site:	Indian Point
Issue date:	06/03/1981
From:	Rosh D CONSOLIDATED EDISON CO. OF NEW YORK, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20004E928	List: 05000247/LER-1981-013, Forwards LER 81-013/01T-0 05000247/LER-1981-013-01, /01T-0:on 810520,low Flow from Two Motor Driven Auxiliary Boiler Feed Pumps at Hot Shutdown Discovered During Surveillance Testing.Caused by New Trim in Generator Level Control Valves Restricting Auxiliary Feedwater Flow
References
LER-81-013-01T, LER-81-13-1T, NUDOCS 8106160186
Download: ML20004E929 (2)

LER-1981-013, /01T-0:on 810520,low Flow from Two Motor Driven Auxiliary Boiler Feed Pumps at Hot Shutdown Discovered During Surveillance Testing.Caused by New Trim in Generator Level Control Valves Restricting Auxiliary Feedwater Flow

Event date:
Report date:
2471981013R01 - NRC Website

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CAUSE DESCRIPTiCN AND CCRRECTIVE ACTIONS M li l t l l New trim in the level control valves installed in feedwater supnly linest l'.

II to the four steam generators restricted auxiliarv feedwater flow.

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- ji plant cooldown was initiated.

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LER 81-013/OlT-0 Indian Point Unit No. 2 During testing of the motor driven auxiliary boiler feed pumps, flow from the pumps was less than required flow.

The plant was at hot shutdown conditions.

There were no adverse con-sequ6nces caused by the pump not producing the required flow.

1 New feedwater regulating valve trim in four (4) lines leading to the steam generators, was installed during the Cycle 4/5 refueling and maintenance outage and was determined to be the cause of the restricted feedwater flow.

A plant cooldown was initiated.

The valve trim in each valve was modified to correct the condition.

The test was re-run with each motor driven auxiliary boiler feed pump, and the data indicated that each pump met flow requirements.

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