05000311/LER-1981-069, Forwards LER 81-069/03L-0.Detailed Event Analysis Encl

Forwards LER 81-069/03L-0.Detailed Event Analysis Encl

ML20037D708
Person / Time
Site:	Salem
Issue date:	08/20/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20037D709	List: 05000311/LER-1981-069, Forwards LER 81-069/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-069-03, /03L-0:on 810721,steam Generator 24 Steam Flow Channel 1 Discovered Reading High & Declared Inoperable. Caused by Erroneous Signal Due to High Multiplier 2FM-542B on Low End.Multiplier Adjusted & Channel Returned to Svc
References
NUDOCS 8108310122
Download: ML20037D708 (3)

LER-1981-069, Forwards LER 81-069/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981069R00 - NRC Website

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O PSEG Public Service Electric and Gas Cornpany 80 Park Plaza Newark, N.J. 07101 Phone 201/430-7000 August 20, 1981 Mr. Boyce H.

Grier Director of USNRC Office of Inspection and Enforcement Region 1 ti31 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-69/03L Pursuant to the requirements of Salem Generating Station Unit No. 2 Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 81-69/03L.

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

Sincerely yours,

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Report Number:

81-69/03L Report Date:

August 20, 1981 Occurrence Date:

7-21-01 Facility:

Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, Haw Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Reactor Trip Instrumentation - Engineered Safety Feature Actuation System No. 24 Steam Generator Steam ? low Channel 1 - Inoperable.

This report was initiated by Incident Report 81-267 CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 48% - Unit Load 440 MWe DESCP.IPTION OF OCCURRENCE:

On July 21, 1981, during a routine channel check, the operator noticed that No. 24 steam generator steam flow channel 1 was reading 20% higher than the other channel.

The channel was declared inoperable and the channel bistable was placed in the tripped condition within one hour.

Limiting condition for oper-ation (L.C.0) 3.3.1, table 3.3.1, action 7 and L.C.O 3.3.2, table 3.3-3, action 14 were entered at 1020 hours0.0118 days <br />0.283 hours <br />0.00169 weeks <br />3.8811e-4 months <br /> on July 21, 1981.

This occurrence constituted operation in a degraded mode in accord-ance with technical specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Multiplier 2FM-542B was found to be high from its low end sctpoint causing the erroneous readings.

ANALYSIS OF OCCURRENCE:

L.C.O.

3.3.1, table 3.3.1, action 7 and L.C.O 3.3.2, table 3.3-3, action 14 both state that:

With the number of operable channels one less than the total number of channels, power operation may proceed until performance of the next required channel funct-i ional test provided the inoperable channel is placed in the tripped condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

LER 81-69/03L

~2-August 20, 1981

CORRECTIVE ACTION

Multiplier 2FM-542B was adjusted to its correct reading value.

The channel was restored to operable status and was reading correctly.

L.C 0.

3.3.1, table 3.3-1, action 7 and 3.3.2, table 3.3-3, action 14 were terminated at 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br /> on July 21, 1981.

FAILURE DATA:

Hagan Multiplier / Divider Part No. 4111511-601 U!'#

Prepared By J.

Varga f

Manager - Sal'em Generating Station SORC Meeting No.

81-78 f

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