ML20151X711

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PNO-77-121:on 770705,unit Was Shutdown from 100% Power,Due to Identified Tube Leakage from RCS to Secondary Sys in One of Two Sgs.Outage Duration Expected to Be Two Weeks.Media Interest Expected
ML20151X711
Person / Time
Site: Ginna Constellation icon.png
Issue date: 07/06/1977
From: Klingler G, Nolan F, Sniezek J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-77-121, NUDOCS 9809170225
Download: ML20151X711 (1)


Text

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PRELIMINARY NOTIFICAT N h[dib!

July 6, 1977 PRELIMINARY NdTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--P This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public intercat sistnificance. The information ~

presented is as initially received without verffication_or evaluation and is basically all that is. known by IE staff on this ' date. j 4

Facility: Rochester Gas and Electric Corp.. '

R.E.Ginna(DN50-244)

, Ontario, New York

Subject:

STEAM GENERATOR TUBE LEAK CAUSES UNPLANNED FACILITY SHUTDOWN i The unit _tyn sh6tdown from 100. percent power at 12:00 noon, July 5,

~ 1977, due .to identified tube leakage from the reactor coolant _ system to the secondary system in one of two steam generators. .

FEom 3:00 a.m to 10:00 a.m., July 5,1977, this leak rate increased from 0.006 to 0.01 gpm. The technical specification limit is 0.1 gpm. At 12:00 noon a decision was made by Facility Management to commence an

. orderly shutdown and cooldown for steam generator examination and repairs.

The expecteo outage duration is two weeks. .

Media interest is' expected because of close attention given to operating l

, problems at nuclear power. plants. The State of New York has been informed. i

,i A press release is being considered by the licensee. -

NRC, Region I, (Philadelphia) received notification of this occurrence by telephone from the Plant Superintendent at 1:15 p.m., July 5,1977.

Contact:

GKlingler, IE x27451 FNolan, IE x27451 JSniezek, IE x27451

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Distribution: Transmitted H St/#.'#d & '

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C. C. Karanerer, CA G. F. Murphy, JCAE i Commissioner Kennedy S. J. Chilk, SECY H. H. Whiteside, SCNR f, . Commissioner Gilinsky 'H. R. Myers, HCEE Transmitted: MNBB /dl d[ PBldg/d;dd SSBldg//.*[

L. V. Gossick, EDO E. G. Case, NRR C. V. Smith, HMSS i

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S. H. Hanauer, ED0 J. A. Harris, PA W. G. Mcdonald, MIPC MAIL E. Volgenau. IE R. G. Ryan, OSP Luge T. J. (ETTe)rnan, OIA Region.l~ /4!/d H. K. Shapar, ELD ,

'j PRELIMINARY NOTIFICATION

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