ML20137Y774

Forwards AEOD/T514, Potential Loss of Component Cooling Water Due to Maladjustment of Relief Valves, Technical Review Rept.Event Should Be Included in Resolution of Generic Issue 23.No Further AEOD Action Necessary

ML20137Y774
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	11/25/1985
From:	Zukor D NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD)
To:	Seyfrit K NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD)
Shared Package
ML20137Y779	List: ML20137Y774 ML20137Y884
References
AEOD-T514, NUDOCS 8603120378
Download: ML20137Y774 (1)

Text

I

^O NOV 2 51985 MEMORANDUM FOR:

Karl V.1Seyfrit, Chief Reactor Operations Analysis Branch Io 79f Office for Analysis and Evaluation i

of Operational Data FROM:

Dorothy J. Zukor, Engineer.

Reactor Systems Section 2 Reactor Operations Analysis Branch Office for Analysis and Evaluation of Operational Data

SUBJECT:

TECHNICAL REVIEW REPORT:

" POTENTIAL LOSS OF COMPONENT COOLING WATER DUE TO MALADJUSTMENT OF RELIEF VALVES" The subject Technical Review Report is enclosed for your information.

On February 16, 1985, a pressure transient in the component cooling water'(CCW) system at the Zion site caused a relief valve to lift. The valve did not reseat until approximately 1700_ gallons of CCW had spilled onto the contain-ment floor and the.CCW system was isolated. Subsequent investigation showed that the nozzle ring settings on the valve were incorrect causing the valve to lift prematurely and to fail'to reseat. The event itself had no serious safety consequences and no generic significance except as an example of a failure mode of the CCW system. AE00 has suggested that this type of event be included in the resolution of Generic Issue 23 which includes CCW system failures. No further action on this event is planned by AE00.

7 6/1 Dorothy

.Z r,

gineer Reactor Systems Section 2 Reactor Operations Analysis Branch Office for Analysis a'nd Evaluation of Operational Data

Enclosure:

As stated cc: w/ enclosure

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