TENNESSEE VALLEY AUTHORITY

CHATTANOOGA. TENNEI ýEE 37401

5N 157B Lookout Place

tah-'!0-390/96-43 ft, 2C 06

U.S. Iclear Regulatory Comission Regio II Attention: Dr. J. ealson Grace, Regional Adinistrator 101 Narietta Street, M, Suite 2900 Atlanta, Georgia 30323

Dear Dr. Grace:

WATTS BAR rCLEAR PLANT - U1IT 1 - CRAZEr; OF C3WAX ELECTRICAL P'IB•U: ..*.. SEALART - BMiD-50-390/6 -43 - FINAL. RPMT

The subject deficiency w•s initially reported to URC-Pelion IT npnn:' zr Bob (-rvoll on April 2, 1986 i' accordman with 10 CFR 50.55(e) c- Bia W-356- P. Our interim report wau ~ubib ted on Ap-il 28, 1986. F .osed is our final report. We no loner -onsi 3r 10 MR 50.55(e) appli.ab; *..o tlis itm.

If you hs-e any questions, pleas rc t in touct with J. A. Ka)ona• I at (615) 365-'.521

Very .rt '.y yours,

.1TSFgep VALL Ai'Pr.:RIrt

Enclosure cc (Ichlosure):

Hr. James Taylor, Director Office of Inspection and nforcement U.S. Muclear Regulatory Commission Washington, D.C. 20555

p.L. L Gridly, Fuclear Safe-y

Direct-,r and Licensing

Records Center Institute of Nuclear Power Oporations 1100 Circle 75 Parkbay, Suite 1500 AtlanLa, Georgia 30339

8609100392 860820 PDR ADOCK 05000390 S PDR An Equal OpporrunLy Emrployer

"I

-CLOSMT WAM BAn MICLrZA PLANT WIT 1

CAZre r o COX sECRUCAL Pr-MrIAI0 SEALArCR 1-356-P

mwD-50-390/6-43 10 CfR 50.55(e)

0ctription of Deficience

During cleaing opesations being performd by TWA persommel on Comn electrical ieetratioau at Vatts B'ar clear Plant ..w), dame to the sealant ateril on the ends of penetrticn fe•wthroughs Ma identified. This dam consists of crazir4 and/or cracking of the sealnt from the otside tip inward; hoMver, te! depth of the dama cannot be visually dotominead. An snalysis of the ceaning solution being used on the sealant (denatured I ,ohol) revealed the prsence of a small amunt of Estone (a chemical pro-,flited by Conax from use on the celants). lowever, other penetr.anrif not subjected to the clean4 n !luid ahow the sae t-pe of dams~

Safety In .cations

A representative from Corax COrporu *ion visited the UB s! ct. Ma. 2•., 196 and 'nspected represen tive sasples of affec :. ,*1* 3 kior-S o. assess the subject conitkion and proride recomwrdai',L1 * VA. As stated in their lettsn to TVA dated June 30, 1986, :noas ',as determined that the subject condition will not i-air the qualifica.lon nor integrity of the penetration fedthroughs. As such, no corrective actions are necessary and TVA has dispop Itioned nonconforming condition report (CR) W-356-P to "use-as-is." Accordingly, WA no longer considers 10 CFR 50.55(e) to be applicab!e to this item.

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