ML20248F187

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PNO-78-122:on 780612,Rancho Seco Facility Was Shut Down When Reactor Coolant Sys Unidentified Leakage Rate Reached TS Limit of 1 Gpm.Power Operations Scheduled for Resumption During Wk of 780619,following Completion of Repairs
ML20248F187
Person / Time
Site: Rancho Seco
Issue date: 06/13/1978
From: Klinger G, Nolan F, Sniezek J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-78-122, NUDOCS 9806040143
Download: ML20248F187 (1)


Text

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"% PRFIIMINARY NOTIFirATTON U a

} June 13,19/8 N PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-78-122

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_This preliminary notification constitutes EARLY notice of an event  !

of POSSIBLE safety or public interest significance. The information  !

presented is as initially received without verification or evaluation .

and is basically all that is known by IE staff as of this date.

Facility: Sacramento Municipal Utility District, Rancho Seco 50-312

Subject:

Facility Outage Due to Reactor Coolant System Leakage The Rancho Seco facility was shut down at 3:00 p.m. on June 12, 1978, when the reactor coolant system unidentified leakage rate reached the i technical specification limit of 1 GPM. The licensee had been monitoring a slowly increasing leak rate during the past month. Power operations are scheduled for resumption during the week of June 19, 1978, following completion of repairs.

. The licensee issued a press release regarding the unit outage on 5 June 12, 1978. This Preliminary Noti i fication is issued for information only.

)

'Mr-' NRC Region V (San Francisco) received notification of the unit outage during tele Assistant) phone at 10:00conversations a.m. on June with the licensee 13, 1978. (Plant The above Technicalis information current as of 12:00 p.m. on June 13, 1978.

Contact:

GKlingler IE x28019 FNolan, IE x28019 JSniezek, IE x28019 Distribution: Transmitted H St #!3.20. 1 Chairman Hendrie Commissioner Bradford Commissioner Kennedy S. J. Chilk, SECY C. C. Kammerer, CA Commissioner Gilinsky (ForDistribution)

Transmitted: MNBB 4:3 h P Bldg 4:M.F E. Volgenau. IE L. V. Gossick, EDO 8 E. G. Case, NRR Region '16 413 h, S. H. Hanauer, EDO '

J. J. Fouchard, PA SS B1dg #; y (MAIL)

N. M. Ha-11er, MPA C. V. Sm'ith, pNMSS T. J. McTiernan, OIA R. G. Ryan, OSP R. Minogue, SD l H. K. Shapar, ELD 1

PRELIMINARY NOTIFICATION

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9806040143 780613 PDR PNO-78-122 I&E PDR l

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