05000219/LER-1982-027, Forwards LER 82-027/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-027/03L-0.Detailed Event Analysis Encl
ML20054J267
Person / Time
Site: Oyster Creek
Issue date: 06/10/1982
From: Fiedler P
GENERAL PUBLIC UTILITIES CORP.
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20054J268 List:
References
NUDOCS 8206280392
Download: ML20054J267 (3)


LER-2082-027, Forwards LER 82-027/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
2192082027R00 - NRC Website

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o GPU Nuclear g g7 P.O. Box 388 Forked River, New Jersey 08731 609-693-6000 Writer's Direct Dial Number:

June 10, 1982 Mr. Ronald C. Haynes, Administrator 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. 50-219/82-27/03L This letter forwards three copies of a Licensee Event Report to report Reportable Occurrence No. 50-219/82-27/03L in compliance with paragraph 6.9.2.b.2 of the Technical Specifications.

Very truly yours, h4r M Pet #r B. Fiedler I

Vice President & Director Oyster Creek 1

l l PBF:Ise l Enclosures l

l cc: Director (40 copies) l Office of Inspection and Enforcement l U.S. Nuclear Regulatory Commission l Washington, D.C. 20555 Director (3)

Of fice of Management Information and l Program Control l U.S. Nuclear Regulatory Commission Washington, D.C. 20555 l

! NRC Resident Inspector (1)

! Oyster Creek Nuclear Cenerating Station l Forked River, NJ 08731 i

l i

l 8206280392 820610 DR ADOCK 05000219 PDR GPU Nuclear is a part of the General Public Utilities System St/

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OYSTER CREEK NUCLEAR GENERATING. STATION Forked River, New Jersey 08731 Licensee Event Report Reportable Occurrence No. 50-219/82-27/03L Report Date June 10, 1982 Occurrence Date May 12, 1982 Identification of Occurrence Liquid poison pump "B" was taken out of service for corrective maintenance for approximately seven hours. This constitutes operation in a degraded mode permitted by a limiting condition for operation as specified in the Technical Specifications, paragraph 3.2.C.3.

This event is considered to be a reportable occurrence per Technical Specifications, paragraph 6.9.2.b.2.

Conditions Prior to Occurrence The reactot was critical in the "RUN" mode.

Thereal Powe r: 1270 MWt Electrical Power: 418 MWe Description o f Occurrence Routine visual inspection by operators led to the discovery of an oil puddle directly below the lube oil fill port of the "B" liquid poison pump. It was suspected that the oil had been forced from the crankcase (out the fill port) due to leakage of borated water from the piston chamber into the crankcase.

Apparent Cauae of Occurrence Further investigation of "B" liquid poison pump stuffing box revealed that the 1" drain line had become plugged with crystalized boron. The drain plug in the stuffing box is intended to provide an effluent route for normal leakage of water through the piston connecting rod shaf t seals to the stuf fing box. This.

caused the stuffing box to fill with borated water. This water in turn entered the crankcase and forced oil from the crankcase sightglass/ fill port.

Licensee Event Report Page 2-Reportable Occurrence No. 50-219/82-27/03L Analysis of Occurrence The liquid poison system utilizes two redundant pumps and is a vital backup system serving as an alternate means of shutting down the reactor in the event of a total f ailure of the control rod drive (CRD) system. In the event of such a failure, the boron solution in the liquid poison system is injected directly into the reactor vessel iba order to absorb the neutrons needed for the continuation of the fission process.

< As the redundant pump was operable, the' safety significance is considered minimal.

Corrective Ac tion Liquid poison pump "B" was tagged out of service. The oil was changed out of the crankcase and the stuffing box drain line was cleared. The pump was returned to service approximately seven hours af ter being taken out of service.

The "A" liquid poison pump stuffing box was checked to verify that the drain line was clear.

In the future, the cover plate from the stuffing box will be routinely removed and a visual inspection performed by Operations personnel for water level in the stuffing box. A high level will indicate inadequate drainage.

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