ML19270E914

LER 78-091/03L-0 on 781201:low Level Radiation Test of Containment Penetrations Was Conducted & Indicated Leakage Exceeded Value of La Specified in Tech Specs.Probable Cause: Isolation Valves Associated W/ Penetrations

ML19270E914
Person / Time
Site:	FitzPatrick
Issue date:	12/27/1978
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19270E912	List: ML19270E911 ML19270E914
References
LER-78-091-03L, LER-78-91-3L, NUDOCS 7901030131
Download: ML19270E914 (2)

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hhile shutdown for Refuel and . Maintenance, Operations Surveillance Test F-ST-39B titled Type B and Type C Test, LLRT of Containment Penetrations was conducted. A management review of the test data indicates that the sum of the pre-repair leakage of the penetrations probably exceeded the value of La spec-ified by 10 CFR 50, Appendix J. Leakage would also have been in excess of the 0.6 La value specified in Technical Speci fication Appendix A, Paragraph 4.7. A.b.2.

In the event of a design basis loss of coolant accident, leakage from the primary containment to secondary containment or enclosed systems in excess of the La value might have been possible for a short period of time while containment pressure was near 60 psia.

Although no individual penetration was found to have leakage in excess of La, isolation valves associated with 21 of 106 penetrations were repaired to reduce leakage to more acceptable values. The repairs varied from replacement of total component (valve) to repair or replacement of parts (Disc, Seat, Packing, etc.).

In each case, following repair, the isolation valves for the penetrations listed above were retested and the sum of leakages (including those penetrations which did not require repairs) was less than 0.6 La.

Additional specific details of pre-repair leakage, repair work and post-repair leakage for each penetration will be submitted as part of the report associated with the Primary Containment Integrated Leak Rate Test which was conducted during the 1978 Refueling and Maintenance Outage.