ML20084F518

Supplementary AO 251-75-9:on 750613,airlock Equalizing Valve Opened Breaching Containment Integrity.Operating Procedure 0202.1 Reactor Startup-Cold Condition to Hot Shutdown Condition, Will Be Revised

ML20084F518
Person / Time
Site:	Turkey Point
Issue date:	07/24/1975
From:	Schmidt A FLORIDA POWER & LIGHT CO.
To:	Rusche B Office of Nuclear Reactor Regulation
References
AO-251-75-9, NUDOCS 8304210155
Download: ML20084F518 (2)

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~ L':J Mr. Benard C. Rusche, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washingten, D. C. 20555 .

Dear Mr. Rusche:

ABNORMAL OCCURRENCE NO. 251-75-9 TURKEY POINT UNIT NO. 4 DATE OF OCCURRENCE: JUNE 13, 1975 SUPPLEMENTARY REPORT: BREACH OF CONTAINMENT INTEGRITY - AIRLOCK EQUALIZING VALVE OPEN A. INTRODUCTION Our Abnormal Occurrence report 251-75-9 of June 20, 1975, reported a breach of containment integrity. A flow path from containment to atmosphere had been inadvertently established through the equalizing valve for the personnel access airlock outer door. The position of the valve operating handle indicated that the valve was shut, however, the mechanical linkage which connects the operating handle to the valve was not connected. The linkage is hidden from view behind a metal plate.

B. CORRECTIVE ACTION

- The proposed permanent corrective action was to add a check point to the " blind flange list" requiring verification that the mechanical linkages for the airlock inner and outer

. door equalizing valves are connected. Subsequent analysis has revealed that a more comprehensive procedural change would provide better assurance of containment integrity. Therefore, rather than add a single checkpoint to the " blind flange list", we will revise Turkey Point Units No. 3 and 4 Operating

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J - 0 0 Mr. Benard C. Rusche, Director Page Two July 24, 1975 Procedure 0202.1, entitled " Reactor Startup-Cold Condition to Hot Shutdown Condition", to include a complete list of items to be checked to verify containment integrity.

Very truly yours,

. . chmidt Vice President Power Resources -

MAS /cpc cc: Mr. Norman C. Moseley Jack R. Newman, Esquire I

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