ML20151X911

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PNO-77-168:on 770923,plant Shutdown from 100% Power to Repair Crack in Eccs.Inspectors Dispatched to Site on 770924 to Evaluate.Repairs Will Require Shutdown Approx 3 or 4 Days.Licensee Made Press Release on 770923
ML20151X911
Person / Time
Site: Trojan File:Portland General Electric icon.png
Issue date: 09/26/1977
From: Klingler G, Nolan F, Sniezek J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-77-168, NUDOCS 9809180001
Download: ML20151X911 (1)


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PRELIMINARY NOTIFICAT10N Ih, l

September 26, 1977 f

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PRELIMINARY NOTIFICATION OF EVENT OR ONUSUAL OCCURRENCE--PNO-77-168 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 on this date. '

Facility: Portland General. Electric Company

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Trojan Nuclear Power Plant, Rainier, Oregon Docket No. S0-344  ;

Subject:

Trojan Plant Shutdown to Repair Pipe Crack in Emergency Core Cooling System l i

On September 23, 1977, the Trojan plant was shut down from 100% power

~ to repair a circumferential crack in the four (4) inch stainless steel common header line to the charging pumps near the suction line to the ,

positive displacement pump. This line~is under a normal operating pressure of approximately 30 psig.

  • The crack is approximately one (1) inch in length in the base metal.  !

- The leakage rate was approximately10-12 gallons per hour.

RegionV(SanFrancisco)inspectorsweredispatchedtothesiteon ,

September 24, 1977 to evaluate-the circumstances. It is expected that.... -l repairs will require the plant to be shutdown approximately 3 or 4 days. - ' '

'The licensee made a press release on September 23, 1977. O NRC Region V'(San Francisco) received initial notification of this

/

y occurrence by telephone from a licensee' representative at approximately 3:30 p.m. on September 23, 1977.

Contact:

GKlingler, IE x28019 FNolan IE x28019 JSniezek, d

IE x28019 A Distribution: . Transmitted H St/.*d / ;

Chairman Hendrie Connissioner Kennedy Commissioner Bradford S. J. Chilk, SECY

-M C. C. Kammerer, CA Commissioner Gilinsky (ForDistribution)

P Bldg M

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Transmitted: MNBB /.'# d E. Volg i. IE L. V. Gossick, ED0_ E. G. Case, NRR Region ///d--

S. H. Hanauer, EDO /

L ~J. J. Fouchard, PA SS Bldg /. 7 O (MAIL)

W. G. Mcdonald, MIPC C. V. Smith, NMSS R. J. McTiernan, OIA .

R. G. Ryan, OSP R. Minogue, SD H. K. Shapar,' ELD .

s PRELIMINARY NOTIFICATION 9809180001 770926 -

PDR Z8dE I PND-77-168 PDR [ ~

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