ML19209C950

PNO-III-79-09B:updates PNO-III-79-09A.On 791003,unit Reached Cold Shutdown.Caused by Tube Rupture in Steam Generator A. Plant Will Remain Shut Down Pending Completion of Generator Insp & Necessary Repairs

ML19209C950
Person / Time
Site:	Prairie Island
Issue date:	10/03/1979
From:	Boyd D, Spessard R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-79-009B, PNO-III-79-9B, TAC-12237, NUDOCS 7910180504
Download: ML19209C950 (1)

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PPILIMINARY NOTIFICATION Date:

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ocyohar 3, 1979 PFILIMI}ARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-79-0Mi Bir Dreliminary notificat. ion constitutes EARLY notice of events of POSSIELE safety or public interest significance.

The infori::ation presented is as initially received without verification or evalustion and is basically all thet is known by IE staff on this date.

Facility:

Northern States Power Co=pany Prn1ric Island, Unit 1 (DN 50-282)

Sub $ e.r.t :

TUBE RUPTURE T.N S~

. GENERATOR A Th La L3,m update. ol PN-Il i-7').- O'! A At 11:!.5 s.:. on Octcher 3. -1979, the Unir reached the cold shutdow: condition (re :te: ceelent syste:: te=perature 1e,s than 200 F).

The plant will retain 0

shutccra pendi.g cc:pletica et the etcc: generator in0pection and cc pletica of the neces.ary repairs.

Inc duratio: of the shutdown in unkncen.

Cor :tM ear i ons (vin th e Red Thanc) 1.crween r' c licensen, Rec. inn TTT and TT.

hw/= 1:een dis tuulluued. Additicually, coatinuous caualu;. of the Re; tion III Sce gen:y Respense Csnt'er has been discontinued.

The Region ill site tcan has con:leted their minnton and han departed the nir.c.

The.cnident in,pneror niid RcI1cn 111 Stecialist inspectors will fcilow the licensce's acticns to rescive this proh: c.

int na".es ci Mi"n-set a and Wiscensin have bet.n notified ef this infer =4 tion-

edia tutetest wutinces Lu be high.

~'h:. - ini rna tio n i s c ur r e nt as of 2:00 p.c.,

Octcber 3, 1979.

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Y r.'4 n U. It*2d 3 St Ca _:x s hcdrie Ccmaissiencr Bradford S. J. Chilh, SECI Cc.ci>ri.ce: Z e:. net Cc=is sicner Ahea rne C. C. Kare:::er, CA Cc=ie ri: er Giliar,ky ACES (For Dist ribution)

Tran: it.cd: F2'23 P. Eldg IE:XCOS (IE: EQ Dist.

L. V. Go::ick, EDO H. R. Denten, NRR E. I..

Ornstein, EDO R. C. DeYoung, NRR J. J. Touchatd, PA R. J. Ma tt s o n, NE:<

Landow (6 min /page)

N. M. Es11ct, MPA D. Vassallo, NRR J. J. C=..i n p, 01 A E. G. Ryan, OSP Tj.Eisenhut, NRR E. L Shapar, ELD pS Eldg

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W. J. Dircks. KMSS R. Minogue, SD S. Levine, PIS IE:X005 7910180 PFILIMINA?.i NOTIFICATION