ML19338G633

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Forwards LER 80-045/03L-0
ML19338G633
Person / Time
Site: Oyster Creek
Issue date: 10/27/1980
From: Finfrock I
JERSEY CENTRAL POWER & LIGHT CO.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19338G634 List:
References
NUDOCS 8010310414
Download: ML19338G633 (3)


Text

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OYSTER CREEK NUCLEAR GENERATING STATION JCP&L GPU "5"c,jwj c"Mo.g, a we ,l;g (609) 693-1951 P.O. BOX 388

  • FORKED R!VER
  • 08731 so-October 27, 1980 Mr. Soyca H. Grier, Director Office of Inspection and Enforcement Region I United States Nuclear Regulatory Commission 6al Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

SUBJECT:

Oyster Creek Nuclear Generating Station Docket No. 50-219 Licensee Event Report Reportable Occurrence No. 50-219/80-45/3L This letter forwards three copies of a Licensee Event Report to report Reportable Occurrence No. 50-219/80-45/3L in compliance with paragraph 6.9.2.b.2 of the Technical Specifications. '

Very truly yours, (j)) . ,(/

van R. Finfr ck, .

Vice Preside t Ge ration IRF:dh Enclosures

)

cc: Mr. John G. Davis, Acting Director (40 copies)

Office of Inspection and Enforcement United States Nuclear Regulatory Commission Washington, D.C. 20555 Mr. William G. Mcdonald, Director (3 copies)

Office of Mana'ement Information and Program Control i

United States Nuclear Regulatory Commission Washington, D.C. 20555 i

8010310'#f' g

0YSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 License Event Report Reportable Occurrence No. 50-219/80-45/3L Report Date October 21, 1980 Occurrence Date October 2, 1980 Identification of Occurrence Operation in a degraded mode as permitted by limiting condition for operation, Technical Specifications, Section 3.4.A.3, when Core Spray System I was removed from service to repair a leaking line vent off the suction of Core Spray Pump NZ01C.

This is reportable under section 6.9.2.b.2 of the Technical Specifications.

Conditions Prior to Occurrence The plant was operating at Steady State Power. s Plant parameters at the time of occurrence were:

Power: Core 1904 MWt Electrical 640 MWe Flow: Recirculetion 15.0 x 10j gpm Feedwater 7.09 x 10 lb/hr Description of Occurrence On Thursday, October 2,1980, at 1545 hours0.0179 days <br />0.429 hours <br />0.00255 weeks <br />5.878725e-4 months <br />, Core Spray System I was removed from service, isolated and drained, in order to repair a leaking 1/4" copper nipple in a 1/2" copper vent line off the suction side of Core Spray Pump NZ01C.

The leak had been discovered earlier in the day by an operator during his tour.

The 1/4" nipple was observed to be leaking at the swagelok tee connecting the nipple and vent valve (V-20-49) to the 1/2" vent line.

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Reportable Occurrence Page 2 Report No. 50-219/80-45/3L Apparent Cause of Occurrence The cause of occurrence can be attributed to component failure when investigation revealed a small crack in the 1/4" nipple.

Analysis of Occurrence The Core Spray System is an emergency standby system designed to provide contir-'d -

cooling of the reactor core during loss of coolant accidents. There are two independent redundant loops, each capable of performing the design function.

The safety significance of this event is considered minimal since the redundant loop was verified to be operable before removing System I from service.

Corrcctive Action The 1/4" nipple and vent valve (V-20-49) were removed from the system and the 1/2" swagelok tee was plugged. Core Spray System I was tested satisfactorily and returned to service at 2240 hours0.0259 days <br />0.622 hours <br />0.0037 weeks <br />8.5232e-4 months <br /> on October 2,1980.

An evaluation will be made to determine if the copper vent line is of proper design for the material used.

Failure Data Not applicable, i

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