T~NE SS VALLEY AUTHOrITY CHATTANOOGA. TOMPESSIM 3740t

WS Chestat Strealwo Tmir fl

beoeub 229 1962

U.S. Wmlear Reolatary Cc~asmaon .

Attn: Wb. Jý P. 091Redus, Iqicizl £.ita 101 Nlhritt& Streets, Suite 3100 Aitimita, Georgia 30303

Dear Mr'. O'ReIlly:

VAITS MRD NUCLEA PLAWt W IT 1 A 2 - I13a~rrlvt =DfIM MM0 OmAIuNY SUP LEMYI T O f[I m - UDE-50-390/82-75t UN-50-39/82-71 FDJL Wmor

Mwu mlbJet defi~cimncy se initially reported to NRC-03l lisepetor I- T. CrlmaJak OR July OP 1962 in morwdaee with 10 GiR 50.55(e) as MCR SI SW "23. Ow first interlm report wes miNtitted ca Augmt 11, 1962. lusamed Is our fInal report V. onside 10 mF Part 21 applicable to tMis defliciny.

If youaw Daney questions,, Plea"se t In tombh With it. ff. Smeli at mT 689-2688.

very truly yuars

T3MZ VALLVY £uTIITT

Officeo nsetonmdlnao

U.S. Nuclear Reglatory Comisaion VasiutnD.C. 2055

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~wieinaor Deficienc

Conainment som level trmmitters nm i I mrsd by M-91otmn, ot City of LZAcutrys, Calfh a c arueb atoU of Pitumtah r~

VmyvMia,4 we separated from their repciebellow smews by aprozite1y is feet of ateismfllem cpilamy, toiqg. "dio level imnmtatiOO, Is arsm to provide Imput, for otinstam ti W -" Core Cooling System: (NCCS) IuCwIm miWtdWr, aid 12 40111000t 04i0nsui end to

help miolter 3=leaks. cotmoind aitions coud amm the water In the capillary tubing to s tate ftl liquid to stý mbc could damW the belIom snowr. The ainigmbl comese of this onfdition Is a deficiency in final deign by "-- I auaa This coditionmwa originally isentirieg at the Sequae Walmor Plant.

Safety lmlCattions

An increase In I Gsperatue dkIW to Acidet Condition coid 1ead to VIMPtUre Of the bellows somear reeltlrIn inaccurarte reaings, which coid result In Inappropriate operator motion or look of appwopriat. autommtie safety functions. This condition omuld aftersely afrect, then ability to softly shuit do= the reactor.

Corrective Lotion

TWA will arrinp for bistIngouse to Osage the fill fluid In the apillarin wleater to Dow Cominig 31702 S" Iim OLIL. The camlbratea

open of the transmtters will be chne by Ikeeti0ofte to ocamt for the ohauus In fill fluid umensities per ýt~as rooamad os Vmrig will be amo t I sboeaforwimts I am2 by July I, 1963.

To prevent reourroeo, this denficiuuncy las begn. reviuned within etou. For the Watts DOr W System, containment smp level Is the onlyt subject to this coniition. Therfore,, no further actions u'i required.