ML20151X965

PNO-77-113:on 770624,primary to Secondary Leakage in B SG Increased About 200 Gallons Per Day.Reactor Was Shutdown for Repair.Plant Will Return to Power by 770628.State of Wisconsin Notified

ML20151X965
Person / Time
Site:	Point Beach
Issue date:	06/27/1977
From:	Klingler G, Nolan F, Sniezek J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-77-113, NUDOCS 9809180038
Download: ML20151X965 (2)

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PRELIMINARY NOTIFICATION J. 6q4d i June 27,1977 PRELIMINARY .NOTIFIdATION OF EVENT OR UNUSUAL OCCURRENCE-PNO This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest sienificance. 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: Wisconsin Electric Power Company, Point Beach Unit 1 (Docket No. 50-266) Two Creeks, Wisconsin

Subject:

STEAM GENERATOR PRIMARY TO SECONDARY TUBE LEAKAGE Wisconsin Electric Power Company reported that on June 24, 1977, at approximately 11:00 a.'m., the primary to secondary leakage in the "B"

steam generator had increased to about 200 gallons per d,ay (gpd). Based i on a twofold increase in leak rate within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, the licensee decided to shut the reactor down to repair the leak. Technical Specifications l require a shutdown when the leakage rate exceeds 500 gallons per day.

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The leakage had steadily increased since the plant returned to power on

s June 21, 1977, following a shutdown for the purpose of repairing a P>

! reactor coolant steam leak (reference PNO-77-108).

The licensee estimates the plant will return to powe'r by June 28, 1977.

There has been no unplanned release of radfoactivity associated with the leakage. -

C The State of Wisconsin was informed of this matter. This preliminary

! notification is issued because steam generator leaks have received special interest in the past.

.' ,No press release is planned by RIII (Glen Ellyn) or the licensee.

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CONTINUE s

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9909180038 770627 l PDR iSE '

, PNO-77-113 PDR

Page 2 PNO-77-ll3 Continued ,; , June 27, 1977 RIII (Glen Ellyn) office received notification of this occurrence by

" telephone from the Assistant to the Plant Manager at 11:30 a.m., on June 24j 1977. This information is current as of 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on

.> - June 24,1977. '

Contact:

GRKlingler, IE x27451 FJNolan; IE x2'/451 JHSniehek,IEx27451 Distribution: Transmitted H St // I / 7 Chainnan Rowden C. C. Kamerer, CA G. F. Murphy, dt,AE Comissioner Kennedy 'S. J. Schilk, SECY H. H. Whiteside, SCNR Commissioner Gilinsky H. R. Myers, HCEE Transmitted: NMSS //f(( P Bldg //.*/ 5 SS Bldg /. R L. V. Gossick, ED0' ' ' E. G. Case, NRR C. V. Sm th, N S S. H. Hanauer, ED0 .

J. A. Harris, PA W. G. Mcdonald, MIPC Luge (MAIL) E. Volgenau IE R. G. Ryan, OSP T. J. McTiernan, OIA Region S H. K. Shapar, ELD. //.*> [

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PRELIMINARY NOTIFICATION - --

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