05000247/LER-1982-037-99, /99X-0:on 820902,svc Water Leak Identified on Reactor Containment Fan Cooler Unit 22.Cause Under Investigation.Leakage Will Be Closely Monitored & Failed Tubes Examined During Upcoming Refueling Outage

/99X-0:on 820902,svc Water Leak Identified on Reactor Containment Fan Cooler Unit 22.Cause Under Investigation.Leakage Will Be Closely Monitored & Failed Tubes Examined During Upcoming Refueling Outage

ML20027B907
Person / Time
Site:	Indian Point
Issue date:	09/16/1982
From:	Hinrichs G CONSOLIDATED EDISON CO. OF NEW YORK, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20027B905	List: 05000247/LER-1982-037, Forwards LER 82-037/99X-0 05000247/LER-1982-037-99, /99X-0:on 820902,svc Water Leak Identified on Reactor Containment Fan Cooler Unit 22.Cause Under Investigation.Leakage Will Be Closely Monitored & Failed Tubes Examined During Upcoming Refueling Outage
References
LER-82-037-99X, LER-82-37-99X, NUDOCS 8209300301
Download: ML20027B907 (2)

LER-1982-037, /99X-0:on 820902,svc Water Leak Identified on Reactor Containment Fan Cooler Unit 22.Cause Under Investigation.Leakage Will Be Closely Monitored & Failed Tubes Examined During Upcoming Refueling Outage

Event date:
Report date:
2471982037R99 - NRC Website

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REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h Io l2l l During normal operation a verv small service water leak was identifind on poncenr

[ o ; 3, l Containm nt Fan Cooler Unit No. 22. The event is being reported in accordance With g o ;4 ; l NRC Bulletin 80-24.

On September 7,1982 a leak was also icientiff r<1 in tho mnling coil of Fan Cooler Unit No. 24. On September 14, 1982 the leak rate of Fan Cooler io,3j l 77; l Unit No. 22 had increased tu approximately 1 GPM with the Fan Cooler Unit in the i o ;, l [ incident mde. Fan Cooler Unit No. 22 was moved fn service on Septtrnber 15, 1982.

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ATTACHMENT I

Docket No. 50-247 Consolidated Edison Co. of N.Y.,

Inc.

LER 82-037/99X-0 Indian Point Station Unit No. 2 The following events are being reported in accordance with the requirements of NRC I.E.Bulletin 80-24.

On September 1,

1982 Consolidated Edison informed NRC Region I of a potential service water leak on Reactor Containment Fan Cooler Unit No.

22.

The leak was verified ca September 2, 1982 and NRC Region I was notified that an extremely small leak existed.

Close monitoring of the leak was initiated and is continuing.

On September 14, 1982 the leak rate had increased to approximately 1 GPM with the fan cooler unit in the incident mode.

On September 7,

1982 Consolidated Edison notified NRC Region I that, during post maintenance testing of Reactor Containment Fan Cooler Unit No. 24, a leak was identified in the cooling coil when the system was pressurized to approximately 50 psig.

The plant was in the hot shutdown condition when the Icak was identified.

The affected cooling coil was isolated to allow repair and one tube was plugged in the No. 4 cooling coil section.

The unit was returned to service with an additional extremely small leak present.

The NRC Resident Inspector was notified.

Monitoring of this leak is continuing.

By September 16 the leak rate had increased to 0.8 GPM.

The current investigation of the causes of the fan cooler leaks will-be fully implemented during the refueling outage scheduled to begin September 18, 1982.

The investigation will include examination of the sections of failed tubes.

Based on investigation findings, suitable corrective action will be taken.

Repairs will be made during the refueling outage.

In the interim, leakage from the fan cooler units is being monitored closely.

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