ML19274F048

LER 79-009/03L-0 on 790430:four Penetrations Found Leaking Excessively During Local Leak Rate Test.Caused by Defects in Limitorque Operator Torque Switch,Seal Rings & Check Valves. All Defects Repaired

ML19274F048
Person / Time
Site:	Cooper
Issue date:	05/22/1979
From:	Phillips D NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19274F047	List: ML19274F046 ML19274F048
References
LER-79-009-03L, LER-79-9-3L, NUDOCS 7906080256
Download: ML19274F048 (1)

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3[U"' ,c lL @l 015 ] COCKET 60 61 01010 NUMB EM l 219 l 688 @l 69 01413EVENT DATE 74 75 OATE EVENT OESCRIPTION AND PROBA8LE CONSEQUENCES h o 2 Phile performing local leak rate test procedure 6.3.1.1. fm * (4) penetrations were 1 o 3 If ound leaking excessively. Technical Specifications Section 3.7.4 requires the primary l o , pontainment leakage to be less than 189 scfh (.60 la). The total as found leakage was 1 0 5 Ppproximately 2400 scfh. The uncontained leakage was less than 230.44 scfh. UE 75-22 ]

0 e pnd LER 77-57 describe previous events of this nature. There was no sienificant occur- !

O 7 fence as a result of this event. There were no adverse affects to public health and I ois pafety. [

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33 34 40 42 44 CAUSE DFSCRIPTION AND CORRECTIVE ACTIONS h i o lof the 4 leaking nenetrations there were 6 valvns ennniroA. T en F,41nena vn-a 4, An i i Limitoroue operator torcue switch. two were 24" Allia N 1-a-a h m en- ,' oc en i I

, , l rings, and the other two were Anchor 8" check valves with rouch sentine surfaces. All I

, 3 ] valves were repaired and tested satisfactory after repair. I i 4 I l 7 a 9 80 ST S  % POWER oTHER STATUS bis o RY DISCOVERY CESCRIPTION i s W@ 0l 0l 01@l NA l l B l@l Local Leak Rate Testing l A TlVITY CCNTENT 1 RELEASED OF AELE ASE AYOUNT OF ACTIVITY LOCATION OF RELEASE NA 7

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