05000313/LER-1979-005-03, /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

/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: 05000313/LER-1979-005, Forwards LER 79-005/03L-0 05000313/LER-1979-005-03, /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
References
LER-79-005-03L-01, LER-79-5-3L-1, NUDOCS 7906180607
Download: ML19273B974 (1)

LER-1979-005, /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

Event date:
Report date:
3131979005R03 - NRC Website

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?S HF,OH1 C ATE 80 EVENT DESCRIPTION AND PROBADLE CONSEQUENCES 1o 121 I During the Refueling Outage, w le leak rate testing of Reactor

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

3 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.

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ivalves inside the Reactor Building did not leak. This o

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

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