TENN mEsE VALLEY AUTHORITY CS-rlrG00-'.,.A Tr(flr$SJCC 17401

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Sepu" 27v,192

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L.S. smlm-, 3spato-y COM lm

&us: Nr. Jones P. Oqle"my, %Ioalm ima.stor,

101 erietta set, bSdta 3100 Atle•t, Gew'la 3M3e3

D" Hr. O'Reilly: cc

'Iu an3 =Za= MR WIT 1 - WNWIU momn 7W 0W1X U NKITIGATIW SamU - U3-503,0/tS2A - MS M iirzM MM

Thb sject defeleeoy mws init•a•y rpoted to IC-QO Impeetor 1. 1. Crlmjak cc fhy 21, 1962 in inoedeame vith 10 CI 50.55(e) as M M 8210. Or first Iterim rept ms amitted cc Jume 22, 1962. goole4 is eo seceod a.terlu rerpt. M expect to s 1t or next ro aor about IHu 31, 1903. TWA Is still Iuvest~imtIn the app]Llblc•blty of 10 Cr1 Part 21 to th.i detloomwy.

if you Mve y qustimou, plesse Pet 773 W5S2666.

in tomb iLtb t. 3. MallU at

very truly Yours,

VA=LEY AIO TIOI

L. H. Mi.ls, Manager Moolear Lioesmin

Enclosure cc: Mr. Riodbrd C. DeTounig, Director (Enclosure)

Office of Insp•otion and Eaforoemmt 0.S. Nuolear Ieplatory Coamission Vuabington, D.C. 20555

8210050099 820927 PDR ADOCK 05000390 S PI)R

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0 CPR 50.95(e) sm Dm= now

DswieVtqm of Condition

The setpolat I AnV provi"M U no (,ittshrsts Penspylvanra) for the unit I Cold Opwurein mUt •Ipti 3jstem (WB) oould aliom the name0 Appeait at limits fr rteator ve1 frectum touglmese to be minded ia the mint ot a ftLlme ad a @Jw pow-opumated ralIef valve OWUV). The W, utilis. sat Wed Opa•p tenm of the Me M tit if the first PM fans to "Mm t mitigate e am *sem trUnsient, thin the send MR will open at aa 91tlOhU *eu Paewur utpoint. For imotr or olnt tcoeoatlts below 1OF, the astpolut ftr the meon F has been dhaeeo O that AppeniLz 0 limits am be violated for the saome inpt meats of oe or o m trtrol aelrgn pm ope rwtie at mzned flaw with isolatim of the letdoni flom path.

This onsomnfrenmoe Is in violation of 7M asetion 5.2.2.4.2.1 and Is

only appliebl to mit 1.

Interim Prows.

TIA s procring aolmold-eatmted valves *s* have ftster oper'atig times then the pmently installed air-opuetei valves. The faster actio of the melmold waLves will help to sininize presure overshoot when the wlves we actuated to mitigate - overpessure transient. TWA as aked Vestiqouse to provide setpolata ad a rap of allomeble valve opewsting times ublcb will mumm that the oerpreaswe mitigting system prfom as described in 731! seotion 5.2.2.1.2.e1.