05000219/LER-1982-018, Forwards LER 82-018/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-018/03L-0.Detailed Event Analysis Encl
ML20054M465
Person / Time
Site: Oyster Creek
Issue date: 06/29/1982
From: Fiedler P
GENERAL PUBLIC UTILITIES CORP.
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20054M466 List:
References
NUDOCS 8207130328
Download: ML20054M465 (3)


LER-2082-018, Forwards LER 82-018/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
2192082018R00 - NRC Website

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GPU Nuclear gg g{ P.O. Box 388 Forked River, New Jersey 08731 609-693-6000 Writer's Direct Dial Number:

June 29, 1982 1

Mr. Ronald C. Hayne s, Adminis trator Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

Dear Mr. Haynes:

Subject:

Oyster Creek Nuclear Generating Station Docket No. 50-219 Licensee Event Report .

Reportable Occurrence No. 50-219/82-18/03L This letter forwards three copies of a Licensee Event Report to report Reportable Occurrence No. 50-219/82-18/03L in compliance with paragraph 6.9.2.b.2 of the Technical Specifications.

Very truly yours, 1

AJW Peter'B. Fiedler Vice Prcsident & Director Oyster Creek PBF:lse Enc losure s cc: Director (40 copies)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Director (3)

Of fice of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.C. 20553 NRC Resident Inspector (1)

Oyster Creek Nuclear Generating Station Forked River, NJ 08731 8207130328 820629 ~

PDR ADOCK 05000219 S PDR v

t GPU Nuclear is a part of the General Pubhc Utihties System Y L. _ _ _ _ .

OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Licensee Event Report Reportable Occurrence No. 50-219/82-18/03L Report Date June 29, 1982 Occurrence Date May 2 7,- 1982 -

Identification of Occurrence Main Steam Drain Valve V-1-106 was operated and failed to fully close.

V-1-106 was declared inoperable and action was taken to comply with Technical-Specification 3.5. A.3.a.1.b.

This event is considered to be a reportable occurrence as defined in the Technical Specifications, paragraph 6.9.2.b.2.

Conditions Prior to Occurrence

. The plant was in a routiae start-up mode. .The reactor was critical in IRM range 8 (approximately 40 MWt).

Description of Occurrence On Thursday, May 27, 1982, at approximately 11:15 AM, during a routine startup, Main Steam Drain Valve V-1-106 was operated and failed to fully close.

Apparent Cause of Occurrence The valve (V-1-106) was operated, closed halfway, then failed to fully close due to a high torque trip of the Limitorque operator. The cause of the high torque trip is still under investigation. However, due to the fact that the valve is located in the Drywell (inerted during plant operation), further investigation of this occurrence will be postponed until access to the Drywell can be obtained.

Analysis of Occurrence The primary containment isolation valves are provided to maintain primary containment integrity following the design basis loss of coolant accident.

Failure of V-1-106 to close, caused a loss of primary containment isolation redundancy. However, if isolation of primary containment had been required in an emergency situation, redundant valves could have operated to provide isolation, of the primary containment.

f Licensee Event Report- Page 2 Reportable Occurrence No. 50-219/82-18/03L Corrective Action V-1-106 was closed electrically and tagged out of service. This valve is normally closed during power operation. Also, main steam drain valves V-1-110 and V-1-111 (outer primary containment isolation valves) were tagged out of service in the closed position as required by Technical Specifications. Repair or replacement of the valve will be accomplished during the next shutdown.

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