05000250/LER-1980-004-03, Radiator Tube Leak on Emergency Diesel Generator a Detected.Probable Cause Due to Foreign Object Being Forced Into Radiator by Cooling Fans & Degradation Induced by External Environ.Leak Repaired

Radiator Tube Leak on Emergency Diesel Generator a Detected.Probable Cause Due to Foreign Object Being Forced Into Radiator by Cooling Fans & Degradation Induced by External Environ.Leak Repaired

ML17340A311
Person / Time
Site:	Turkey Point
Issue date:	10/10/1980
From:	Pace P FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17340A310	List: 05000250/LER-1980-004, Forwards Updated LER 80-004/03X-1 05000250/LER-1980-004-03, Radiator Tube Leak on Emergency Diesel Generator a Detected.Probable Cause Due to Foreign Object Being Forced Into Radiator by Cooling Fans & Degradation Induced by External Environ.Leak Repaired
References
LER-80-004-03X, LER-80-4-3X, NUDOCS 8010280690
Download: ML17340A311 (2)

LER-1980-004, Radiator Tube Leak on Emergency Diesel Generator a Detected.Probable Cause Due to Foreign Object Being Forced Into Radiator by Cooling Fans & Degradation Induced by External Environ.Leak Repaired

Event date:
Report date:
2501980004R03 - NRC Website

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30 EVENT OESCAIPTIQN ANO PRQEAELE CONSECUENCEE QIO An o erator detected a radiator tube leak on the.A Emergency Diesel Generator (EDG).

.This degradation is reportable-pursuant to TS.6.9.2.b;2.

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~t) 'I 3 0 II 0 le I I IO The radiator a=d other unrelated EDG components were repaired.

The EDG was tested and returned to service within 45,hours.

During the period the A ED'G was out 'of service the B-EDG was verified o erable and available.

A similar occurrence of a,EDG radiator failure was reported as LER 250-77-6.

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USE QESCRIP "QN 'NO AAECflVEACTIONS O22 I The ins in the area of the tube leak were displaced and the tube was slightly inaented.

This probably resulted from a foreign'object being.

P forced into.the radiator by the cooling fans.

This damage coupled with deg ad t'on induced by the external environment,,

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Gorrective action is-discussed in the attachment.

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REPORTABLE. OCCURRENCE '250-80-.04, UPDATE 1

'LICENSEE EVENT REPORT PAGE TWO Additiona1 Cause Descri tion and Corrective Actions:

The,fins in the'rea of'he tube leak were displa'ced and the tube was slightly indented.

This probably resulted from a foreign object being forced into the radiator by the cooling fans.

This damage-coupled with degradation induced by the 'external environment was the probably root cause of the leak.

The leak was repaired with an epoxy patch.

New radiator cores were ordered.

The integrity of both the.A 6 B EDG radiators was verified by visual examination.

The new rad ator cores were installed in September 1980.

Component Data:

Young Radiator Company Racine.. Wisconsin Model

!r'4.95D Monowled Cooler Assemoly Drawing DD238084 Job 825604 Working Pressure 35 ps'est Pressure 40-50 osi Air