05000336/LER-1981-007-03, /03L-0:on 810127,diesel Generator 12U Oil Cooler Found Leaking Svc Water.Caused by Corroded Sacrificial Zinc Anode.Zinc Inspected & Replaced & Maint Insp of Zincs Increased from Monthly to Weekly

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/03L-0:on 810127,diesel Generator 12U Oil Cooler Found Leaking Svc Water.Caused by Corroded Sacrificial Zinc Anode.Zinc Inspected & Replaced & Maint Insp of Zincs Increased from Monthly to Weekly
ML19341D454
Person / Time
Site: Millstone Dominion icon.png
Issue date: 02/24/1981
From:
NORTHEAST NUCLEAR ENERGY CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19341D452 List:
References
LER-81-007-03L, LER-81-7-3L, NUDOCS 8103050616
Download: ML19341D454 (1)
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LER-1981-007, /03L-0:on 810127,diesel Generator 12U Oil Cooler Found Leaking Svc Water.Caused by Corroded Sacrificial Zinc Anode.Zinc Inspected & Replaced & Maint Insp of Zincs Increased from Monthly to Weekly
Event date:
Report date:
3361981007R03 - NRC Website
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8 60 61 DOCKET NUhadER EVENT OFSCRIPTioN AN'? PROBABLE CONSEQUENCES h I

[o12Jl During normal operations, the 120 Diesel Gener_a_t_or_(OfE) oil conf or I

was found leaking service water.

The leak was stopped by gpl u

gq7) g isolating the service water to the 120 D/G.

The plant was I

I n s l operat ad in accordance wi th T.S. A.S. 3.8.1. la_f.or 7_houts_and 1

pgI 55 minutes. No.similar events have occurred.

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33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o l A sacrificial zinc anode had corroded rpsultinn in the leakace.

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zinc was replaced and the remaining zines were inspected and i

replaced as necessary.

Planned maintenance inspection of the zincs has been increased from monthly to weekly.

This incident has been discussed with the applicable maintenance personnel.

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