ML19331D837

LER 80-013/03L-0:on 800801,during Refueling Outage, Surveillance Leak Test Results Exceeded Tech Spec Limits Due to Leakage Failure of Eight Msivs.Caused by Improper Seat Contact Due to Damage to Seats,Plugs & Guides

ML19331D837
Person / Time
Site:	Peach Bottom
Issue date:	08/29/1980
From:	Cooney M, Wergard A PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-80-013-03L-01, LER-80-13-3L-1, NUDOCS 8009030635
Download: ML19331D837 (1)

Text

..yi e i t. J.c ie r . U i r et t ur tio. 2 - bO-OO/>L Cft he of in:,pcL tivn L Enforcement, Rcgion l U.S. Nacicer Regulatory Ccmission 631 Park Avenue King of PrusY,la, PA 19406

Dear Mr. Grier:

This LER pertains to the primary containment local leak tests that exceeded the total limit of 0.6L(A). This requirement is specified in 10 CFR 50 APP.J III B3. Also, this LilR concerns the MSIY local leak test limits as specifisd in Tod2. Spec. h.7. A2f.

U. S. NUCLEAR REGULATORY COMMJS$10N ,

UCENSEE EVENT REPORT 1

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80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h i o 12 l l During Unit 2 refbel outage, surveillance leak test results exooeded  ;

ioi3i [ limits in Tech. Spec. h.7.A.2.f. Eight MSlY8s failed individual leakage i

o l4i l limits. Double isol. valve leakage failures

Main sta. drain and RCIC l

. o i s 1 l exh. drain isol. valves. Single isol. valve failures main sta. Sample, g

o161 1 02 analyzer, HPCI sta. supply, inerting makeup, HPCI exh. isol., and four i ol11 [ chilled water penetration isol. valves. All valves were repaired and g u i i, i i successfully ratested to ensure primary containment integrity. [

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CAUSE DESCRIPTION AND CORRECT VE ACTIONS ,7

- I o l [ MSIV failures were caused by improper seat contact &ae to damage to q

i iij iseats, plugs, and guides. The RCIC exh. drain valve seats were damaged t i,i i by debris and dirt. The main stan. drain leakage was caused by packi.sg i

, i ., i [ leaks and improper seat contact. All valves were machined d ere j i14i t necessary, polished, cleared of dirt, retested and retumed to cervices. l -

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