ML19257B412

LER 79-029/03L-0:on 791206,prior to Performing Leak Test, Primary Containment Oxygen Analyzer Return Isolation Valve AO 2-8803 Would Not Fully Close.Caused by Binding of Valve Stem & Valve Packing.Valve Removed & Repacked

ML19257B412
Person / Time
Site:	Quad Cities
Issue date:	01/02/1980
From:	Soden R COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19257B406	List: ML19257B405 ML19257B412
References
LER-79-029-03L-04, LER-79-29-3L-4, NUDOCS 8001150675
Download: ML19257B412 (1)

Text

NHC FORM 366 U. S. NUCLEAR REGUL ATORY COMMISSION (7 77)

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60 61 DOCKET NUY8ER 6d 63 EVENT DATE 14 15 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l Prior to performing local leak rate test, procedure QTS-100-9, primary containment l g 3 g oxygen analyzer return isolation valve A0 2-8803 would not fully close. The redundany o 4 l primary containment isolation valve, A0 2-8804, did close properly and passed the i O s l local leak rate test with an as-found leak rate of 2.9 SCFH. Had a Group 11 l

[o lc ] l Isolation occurred, A0 2-8804 would have provided the proper and adequate O 7 l containment isolation. l 0 8 l I 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SUSCODE SUDCODE

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h giloll The cause of this occurrence was component failure due to binding of the valve j g i ;, j t stem and valve packing. The A0 2-8803 valve was removed, inspected, cleaned, and g gl repacked. The valve was functionally operated, closure timed, and local leak  ;

rate tested and was found to have a leak rate of 0.0 SCFH. l 11 14 1 I l 7 8 9 80 ST S  % POWER OTHER STATUS ISCO RY DISCOVERY DESCRIPTION y @ l0 0 l 0 l@l NA l l B l@[ Test l A TIVITY CO TENT aELEASEo OF RELEASE AYOUNT OF ACTIVITY LOCATION OF RELEASE NA NA 7

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