ML18138A059

Advises of Piping Sys Reanalysis Status,Per IE Bulletins 79-02 & 79-14 & NRC 790313 Show Cause Order.Pipe Stress Analysis & Resulting Mods Will Be Completed Prior to Facility Startup

ML18138A059
Person / Time
Site:	Surry
Issue date:	02/26/1980
From:	Spencer W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-79-02, IEB-79-14, IEB-79-2, NUDOCS 8003040423
Download: ML18138A059 (2)

Text

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e Vepco VIRGINIA ELECTRIC AND POWER COMPANY Mr. Ja~es P. 0 1Re111y, Dir*ctrr Off1c~ ~f In!pectir.n & EnforcP.m~nt U. s. Nuc1~ar R~guhtor_v C~irmi$sicin Region II

~01 Mar1ett~ st~~Pt, Suitt 3,00

~tl~nta, Georgi~ 10103 Dear ~r. 0 1Rei11y:

Fel:l:--uary 26, 1~80

$~rial ~'..'!. 144 PSE&C/CMRjr:vl:wang DDcket No. ~0-?81 License No. DPR-17 STATUS OF PIPING SYSTEM REANALYSIS SURRY POWER STAT_ION _l:!!!lT 2 The purpose of this l~tter is t1 !~vise you of the status of the piping syst~ reanalysis for Surry Power Station tfi,it ?.

w~ also wi~h to arfv*ise.YCIU of a request to the ~RC Office of Nuclear Reactor Regulation (~RR} to p~rmit t:1~ return of the Unit to servic:? upcn completion of c~rtairt modifkat~cns anrl alsr, mare the same r?qut">st r:,f you'!".:-ffice.

T~~ return of Unit l to service in October 1979 w~s pre1icated upon completion of c~"'tain analyses.1nd resulting modif1cat1ons to piping s.ystGms subject to t~e NRC Order to Show Cause of March 13, 1979.

In our lettPr* of February 22, l?PO (Vepco S2rial No. 1~8) to Ml"'. Harold R. Denton, we have tE'.quest*~,1 permission for str.:rt-up of Unit ? after,1 simili!r scop~ of analy'SiS and morlifications h~s heen complete~.

In ~.:frf1tinn to the scope of work to he completed for the Order to Show Cause pr*ior t<> start-up of tJrdt ?, ther~.,as been or t,iill be a substantia1

-=lmo1mt of wo... k comp l ete1 fo conjunction w1th IE Bulletin 7<:1-14 and IE Bull et1 n 79-0~.

The adrfitfl'.)nal work t1at will be comp1ete:1 pr'lor to start up of Unit 2 is as fo1lows:

1.

Co~plet1on of pipe stress ~nalvsis and resulting morlifications iristalled for an ff B:.i11~til'J ?C-M, D1pe st.ress problems inside t"'e containment.

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Completion of detailed suoport anJ11l_vsis and res111t'inq mo'11f1r.at1ons 1nsta11e:i fot" ~11 IE Ot.*11"':'tin 7'-'1-1~ pipe stress problems inside the conta1~ment.

3.

An on ~o1~q effort for IE Bulletin 79-n? involving 1nspectin9 and testing one e.cc~ssin1e ilnchor bolt per base plate an1 analyzing hase pl!tes f0r fl~xihility. All ~ork 1nstde the containment will be compl~te~.:m.-1 approximately 80% of the work t

0*1tside th~ cont~111Trl~nt ~111 '"in complet~d prinr to start-11p.

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• At the, present time, it appears that -the modifie;ation:s* noted abnve can be completed in_May; 1980 depen'cting on the installati.on ra.te d11r fi*eld forces. *arc-

,. a.b le to attain.

The r~mainfr.gwork.to be::~omo1eted_after start-up wi11.becompletion of

• • .*the.support.ana-1.ys:is and any r11odifkations that might be retjut_r~d on the,...

. remaining-s:ystems outside.the containment*for, both Show Cause.. and IE Bulletin

. 79-14.

The**reporting proce.ss for *signif'i'cant. mcidifi"cations t*ti.ll follow the*

procedtH'e**outlinec,t in our.letter of Novr.mber::28';-1979 (SerialNo. 972)'to Mr.

Harold R. *Denton, a c9py of vihi_ch \\vas *sent to. your ciff i(i:e *.

~le be'iiev'e.that the t.inalyticar'effort compJeted and the modifi_cations...

insta"lie,d* at.the time of start-up pr.ov*ic!e *a*high degree of confidence that, the.

integr*ify '6( s~Jety.systerns,*fox-Unit 2 can be assured during.the DBE. :or OBE

events~ *,'The remainin9. 9,nalytical, and-modifi'cation \\r!Ork. outsi,de the

• containmerit***\\'li,11 be exped:ited,during the opey-atibn.of*the Unit~*

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