ML19273B974

LER 79-005/03L-0 on 790524:during Leak Rate Testing, Penetration V-1 Leaked in Excess of 50,000 Cubic Cm/Minute. Caused by Buildup of Boric Acid Crystals on Valve Seating Surfaces.Repairs Made & Penetrations Retested

ML19273B974
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/12/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19273B968	List: ML19273B967 ML19273B974
References
LER-79-005-03L-01, LER-79-5-3L-1, NUDOCS 7906180607
Download: ML19273B974 (1)

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NRC FORM 3o6 (7 77) U. S NUCLE AR REGUL ATORY COMMISSION LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK: I Ll l l l l lh (PLE ASE PRINT OR TYPE ALL REOUIRED INFORMATIONI 6

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o 3 [ Building penetrations, penetration V-1 and penetration #41 had ,

lo 141 l leakane in excess of 50,000 cc/ min. Leakage was isolated ,

e s ito CV-7402 on V-1 and CV-1667 on #41. Their associated i o e ivalves inside the Reactor Building did not leak. This ,

o i Ioccurrence is similar to 50-313/77-15. g o e i Reportable per T.S.6.12.3.2. (b) .

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11 4G gj 43 ad g; cat lSE DESCR.DTION AND CORREC flVE ACTIONS h li t c,11 Investigation revealed that CV7402 required an adjustment to ,

tiiiii the valve seat and CV1667 had a build up of boric acid crystals on ,

i,i,ii the seating surfaces. Repairs were made and penetrations were ,

I>131I retested, meetine the 60*6 La acceptance criteria of T.S.4. A. I .2.3.  ;

i . I Manufacture of CV7402 is Henry Pratt Co, CV1667 is ITT Hammel Dahl .

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