05000272/LER-1981-045, Forwards LER 81-045/03L-0.Detailed Event Analysis Encl

Forwards LER 81-045/03L-0.Detailed Event Analysis Encl

ML19350E054
Person / Time
Site:	Salem
Issue date:	06/10/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19350E055	List: 05000272/LER-1981-045, Forwards LER 81-045/03L-0.Detailed Event Analysis Encl 05000272/LER-1981-045-03, /03L-0:on 810429,Action Statement 3.3.1.1 Was Entered Due to High Voltage Intermittently Cutting in & Out in Source Range-N-31 Detector Channel.Caused Undetermined. Supplemental Rept Will Be Issued in Case of Reoccurrence
References
NUDOCS 8106160349
Download: ML19350E054 (3)

LER-1981-045, Forwards LER 81-045/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721981045R00 - NRC Website

text

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O PSEG Public Service Eleutric and Gas Company 80 Park Plaza Newark, N.J. 07101 Phone 201/430-7000 June 10, 1981

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h Mr. Boyce H. Grier g

g3(S Director of USNRC e*

i Office of Inspcciion and Enforcement ph 8

Region 1

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,,5, 631 Park Avenue

.g g King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 81-45/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 81-45/03L.

This report is required within thirty (30) days of the occurrence.

Due to a document tracking problem at our station, this report is late.

We have revised the system to minimize the chance of recurrence.

Sincerely yours, k

/

R. A. Uderit/

General Manager -

Nuclear Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Contro' (3 copies) s7 The Energy Peop'e 8106160 3 v..

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Report Number:

81-45/03L i

June 10, 1981 Report Date:

Occurrence Date:

4/29/81 Facility:

_ Salem Generating Station, Unit 1 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE.

Source Range Channel - N Inoperable CONDITIONS PRIOR TO OCCURRENCE:

Mode 2 - Rx Power 1% - Unit Load OMWe DESCRIPTION OF OCCURRENCE:

At 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> on April 29, 1981, tne Action Statement for Functional Unit 6A on Table 3.3-1 for Technical Specification 3.3.1.1 was entered due to a problem involving an intermittent high voltage to the Source Range Channel N31.

This occurrence constituted operation in a degraded mcde in accordance with Technical Specification.6.9.1.9b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The designation for the apparent cause of the occurrence is equipment failure.

The subject source range channel circuitry was functionally checked; the results of which were satisfactory and provided no indication as to what the specific cause was.

In addition, the K629 relay was resistance checked with satisfactory results.

This check also provided no indication as to what the specific cause was.

To provide for continuous monitoring, a recorder was installed in the circuit.

A review of the recorder strip charts has shown no additional voltage spikes or provided any other indication as to the source of the problem.

ANALYSIS OF OCCURRENCE:

Functional checks and troubleshooting techniques provided no real indication as to the cause or source of the intermittent high voltage to Source Range Channel N31.

Technical Specification 3.3.1.1 (Functional Unit 6A), Action Statement 4 of table 3.3.1 states that with the number of channels operable one less than required by the minimum channels operable requirement and with the thermal power level above P6, operation may continue.

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- 6/10/81 LER: 81-45/03L

CORRECTIVE ACTION

functional checks and troubleshooting of the Source As discussed above, Range Channel N31 circuitry did not result in an identification of the source of problem.

All checks, troubleshooting, and tests were conducted Should a similar with results proving satisfactory circuit operation.

occurrence with Source Range Channel N31 arise during the next plant-startup, a-supplemental report will-be prepared.

FAILURE DATA:

Not Applicable Prepared By J. J. Espey Manager - Salem Generating Station SORC Meeting No.

81-42 i

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