ML19256C850

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PNO-79-315:unit Shutdown Initiated to Repair Nonisolable Steam Leak,Apparently from Weldolet for 4-inch Auxiliary Feedwater Turbine Driven Pump Steam Supply Takeoff from 12-inch Atmospheric Dump Supply Line
ML19256C850
Person / Time
Site: Millstone Dominion icon.png
Issue date: 08/08/1979
From: Bryan S, Mckee P, Nolan F
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-79-315, NUDOCS 7910150300
Download: ML19256C850 (1)


Text

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SW PRELD11 NARY NOTIFICATION e

August 8, 1979 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-79-315 This oreliminary notification constitutes EARLY notice of events of POSSIBLE safety or oublic interest significance.

The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff.on this date.

Facility:

Northeast Nuclear Energy Co.

Millstone Unit 2 Waterford, Connecticut D kl (DN 50-336)

IU DR

Subject:

UNSCHEDULED SHUTDOWN Unit shutdown has been initiated to repair a nonisolable steam leak, apparently from a weldolet for the 4" Auxiliary Feedwater Turbine Driven Pump steam supply takeof f f rc'- the 12" Atmosph.eric Dump Supply Line.

Leakage was initially de-tected about 1:00 a.m. on August 8 and became more severe during the night (to ir excess of 10,000 lb/hr).

No radioactivity releade was involved.

Snutdown curation is expected to be two to four days.

S'ecia ir.terest is expected because of sensitivity to nuclear oower plant problems.

The State o' Connecticut has been informed.

A press release is p,anned by the licensee.

NRC, Region I, (Philadelphia) was informed of this occurrence by verbal notifi-cation of tre resident inspector onsite at 5:30 a.m. on August S.

entact:

PMcKee, IE x28019 FNolan, IE x28019 SEBryan, IE x28019 Distributior-Transmitted H St Cr.aircan nendrie Commissioner Bradford S. J. Chilk, SECY Comrissione-Kennedy Commissioner Ahearne C. C. Kammerer, CA Co.-issioner Gilinsky ACRS (Fcr Distribution) ansmittec:

MNBB P. Bldg ?".3

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Stello, IE G:ssick, EDO H. R. Denton, NRR Region

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_. Ornstein, EDO R. C. DeYoung, NRR J.

u:na-d, PA R. J. Mattson, NRR hailer, MPA D. Vassallo, NRR (MAIL) 3.

Rja., OSP D. Eisenhut, NRR J. J.

Cummings, GIA Sha:ar, ELD' SS Bldg _

R. Minogue, SD H.

W. J. Dircks, NMSS

5. Levine, RES PRELIMINARY NOTIFICATION kk) 9 2.1 0 15 o 2 0 m

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