ML19257A155

LER 79-107/03L-0:on 791203,primary Containment Oxygen Analyzer a Indicated Greater than 10% Oxygen Concentration in Primary Containment.Analyzer B Was Out of Svc.Cause Not Stated.Instruments Recalibr & Returned to Svc

ML19257A155
Person / Time
Site:	FitzPatrick
Issue date:	12/26/1979
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
ML19257A154	List: ML19257A153 ML19257A155
References
LER-79-107-03L, LER-79-107-3L, NUDOCS 8001020363
Download: ML19257A155 (2)

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JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 -

ATTACHMENT TO LER 79-107/03L-0 Page 1 of I During normal operation personnel noted that following a power interruption to Primary Containnent Oxygen Ar.alyzer ' A', the instrument indicated greater than 10% oxygen concentration in the Primary Containnent. Analyzer 'B' was also out of service and thus there was no means of verifying that the oxygen concentration was equal to or less than 4% as required by Technical Specification Appendix A, Pa ragraph 3.7. A.6.a. Utilizing portable equipnent, a sample of the primary

- containnent atmosphere was obtained and analyzed. This analysis revealed that the oxygen concentration was 3 7% which is within the limitations of the referenceo Technical Specifications paragraph. Ir addition, it should be noted that the primary containnent was being maintained inerted with nitrogen at a positive pressure of approximately 1.7 psi and no activities which might allow the addition of oxygen with air, or the infiltration of air, to the primary containment were being conducted. Therefore the event did not represent a signi ficant hazard to the public health and safety.

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The instrument was calibrated utilizing Instrument Surveillance Procedure F-ISP-31 titled "Containnent Oxygen Analyzer *and returned to service on the following day. Following recalibrat ion, the indicated oxygen concentration was 2.6%.

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