05000219/LER-1982-050, Forwards LER 82-050/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-050/03L-0.Detailed Event Analysis Encl
ML20063P705
Person / Time
Site: Oyster Creek
Issue date: 10/01/1982
From: Fiedler P
GENERAL PUBLIC UTILITIES CORP.
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20063P706 List:
References
NUDOCS 8210150098
Download: ML20063P705 (3)


LER-2082-050, Forwards LER 82-050/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
2192082050R00 - NRC Website

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

October 1, 1982 Mr. Ronald C. Haynes, Administrator Region I U.S. Nuclear Regula'.ory Commission 631 Park Avenue King of Prussia, PA 19406

Dear Mr. Haynes:

Subj ect: Oyster Creek Nuclear Generating Station Docket No. 50-219 Licensee Event Report Reportable Occurrence No. 50-219/82-50/03L This letter forwards three copies of a Licensee Event Report to report Reportable Occurmnce No. 50-219/82-50/03L in compliance with paragraph 6.9 2.b.3 of the Technical Specifications.

Very truly yours, A __k Peter'B. Fiedler Vice President and Director Oyster Creek PBF:lse Enclosure s cc: Director (40 copies)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 l

Director (3) i Office of Management Information and Program Control l U.S. Nuclear Regulatory Commission Washington, D.C. 20555 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, NJ 08731 9210150098 821001 PDR ADOCK 05000219 PDR S

GPU Nuclear is a part of the General Public Utilities System g[-

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, .- h OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Licensee Event Report Reportable Occurrence No. 50-219/82-50/03L Report Date October 1, 1982 Occurrence Date August 28, 1982 Identification of Occurrence Two of five Electromatic Relief Valves (EMRV) were inoperable with reactor pressure greater than 110 psig and reactor coolant temperature greater than 2120F. This configuration is in violation of Technical Specification 3 4.B.l.

This event is considered to be a reportable occurrence as defined in the Technical Specifications, paragraph 6 9 2.b.3 Conditions Prior to Occurrence Power: Reactor - 0 MWt Generator - 0 MWe Reactor Coolant Temperature - Greater Than 2120F.

The reactor was in the REFUEL mode.

Description of Occurrence On August 28, 1982, at approximately 0850 hours0.00984 days <br />0.236 hours <br />0.00141 weeks <br />3.23425e-4 months <br />, during performance of the NSSS leak test, two of five EMRV control switches were in the "0FF" position. The temperature and plessures recorded during this test were ss follows:

Pressure (psig) Temperature (OF) 500 210 890 218 1010-1020 223 l

l Technical Specifiestion 3 4.B.1 requires five operable EMRVn when reactor water

! temperature is greater than 2120F and the reactor is pressurized above 110 psig.

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. o b Licensee Event Report Page 2 Reportable Occurrence No. 50-219/82-50/03L Apparent Cause of Occurrence This event apparently resulted from an inadequate procedure. The NSSS leak test procedure (No. 602.4.001) had been revised recently with the test pressure raised to 1010-1020 psig from 890 psig and two of the five EMRVs put in the "0FF" position. The revised procedure did not address the temperature limitation of the Technical Specification adequately.

Analysis of Occurrence The NSSS leak test is performed af ter maintenance or repair of a component in the primary reactor coolant loop, with the reactor in the shutdown or refuel mode. Since the NSSS leak test is performed with the use of the Control Rod Drive pump and the capacity of one pump is less than that of one electromatic relief valve, the safety significance of this event is considered minimal. The autonatic pressure relief function of these valves (but not the automatic depressurization function) may be inoperable or bypassed during the system hydrostatic pressure test required by ASME Code Section II,15-500 at or near the end of each ten year inspection interval.

Corrective Action The NSSS leak test procedure will be revised to require five operable Electromatic Relief Valves rhen the temperature exceeds 2120F. In addition, the procedure will be revised to verify that all other Technical Specification requirements for exceeding 2120F are included in the procedure.

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