ML20204F849

Final Deficiency Rept Re Potential for Inaccurate Indication of Westinghouse Mfg Gate Valve Position.Initially Reported on 821222.Westinghouse Issued Field Change Notice Documenting Corrective Actions

ML20204F849
Person / Time
Site:	Marble Hill
Issue date:	04/21/1983
From:	Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, 582-32, SVP-0022-83, SVP-22-83, NUDOCS 8305020291
Download: ML20204F849 (2)

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- c PUBLIC SERVICE INDIANA April 21, 1983 S. W. Shields S82-32 Senior Vice President . SVP-0022-83 Nuclear Division Mr. James G. Keppler, Docket Nos.: STN 50-546 Regional Administrator STN 50-547 U. S. Nuclear Regulatory Commission Construction Permit Nos.:

Region III CPPR - 170 799 Roosevelt Road CPPR - 171 Glen Ellyn, Illinois 60137 Marble Hill Nuclear Generating Station - Units 1 and 2

Dear Mr. Keppler:

On December 22, 1982, Mr. L. G. Yeager of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as required by 10 CFR 50.55(e). Westinghouse notified PSI of the potential for certain Westinghouse manufactured gate valves to indicate they are " closed" prior to the valve disc fully isolating flow. Should the valve stall or bind following the premature indication, the plant operator would have an inaccurate indication of the true valve position.

Depending on the valve application and consequences of inaccurate closure indication, the wiring of certain valves needs to be modified to meet oper-ational safety requirements. A plant-specific review for Marble Hill was performed by Westinghouse and identified valves 8802A, 8802B, 8809A, 8809B, 8835, and 8840 as requiring modification. For these valves, incorrect position indication by itself causes an unacceptable situation that violates the established licensing basis. Affected valve applications where other means of flow indication or flow isolation is available have also been identified. Westinghouse has written a Field Change Notice (FCN) documenting the corrective actions necessary to ensure accurate valve indication.

Also with the FCN is the repair procedure documenting the methods to be used in performing the corrective actions.

This letter is intended to fulfill the requirements of a final report as required by 10 CFR 50.55(e) . If you have any questions regarding this matter, please contact me at your convenience.

Sincerely, 8305020291 830421 PDR ADOCK 05000546 '[ u 6 PDR S. W. Shields SWS/LGY/bak APR 2 51983 P. O. Box 190, New Washington, Indiana 47162 812. 289 .3000 Id.2 9 t

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PUBUC SERVICE y INDIANA

., Letter

J. G. Keppler April 21, 1985 S82-32 SVP-0022-83 4

cc Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555~

J. E. Konklin J. F. Schapker J

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