05000311/LER-1981-093, Forwards LER 81-093/03L-0.Detailed Event Analysis Encl

Forwards LER 81-093/03L-0.Detailed Event Analysis Encl

ML20049A754
Person / Time
Site:	Salem
Issue date:	09/21/1981
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20049A755	List: 05000311/LER-1981-093, Forwards LER 81-093/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-093-03, /03L-0:on 810825,auxiliary Alarm Annunciator Failed Causing Containment Sump Level Monitoring Sys to Be Declared Inoperable.Caused by Failure of Integrated Circuit Chips.Circuit Chips Replaced
References
NUDOCS 8110020224
Download: ML20049A754 (3)

LER-1981-093, Forwards LER 81-093/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981093R00 - NRC Website

text

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yp q O PSEG J'ublic Service Electric and Gas Company P.O. Box '68 Hancocks Bridge, New Jersey 08038 Salem Generating Station September 21, 1981 D

D Mr.

R.

C.

Haynes 6

q Director of USNRC Office of Inspection and Enforcement N

Region 1 D007 p4 2

631 Park Avenue b,4

([j ke King of Prussia, Pennsylvania 19406 i

Dear Mr. Haynes:

LICEN?>E NO. DPR-75

'M DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-93/03L 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 81-93/03L.

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

Sincerely yours, l

GLh H.

J.

Midura Manager - Salem Generating Station CC:

R. A.

Uderitz General Manager - Nuclear Production Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies)

MsO

' 8110020224'810921 PDR ADOCK 05000311 S

pop The Energy People 9s2ie9 02 sw tieo

_ _ ~. _. _ _ _

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Report Number:

81-93/03L Report Date:

9-21-81 Occurrence Date:

8-25-81 Facility:

Salem Generating Station, Unit 2 Public Service Electric & Cas Company-Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Reactor Coolant Leak Detection System - Inoperable.

This report was initiated by Incident Report 81-342.

CONDITIONS PRIOR TO OCCURRENCE:

f Mode 1 - Rx Power 98% - Unit Load 1130 MWe j

DESCRIPTION OF OCCURRENCE:

l At 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />, August 25, 1981, the auxiliary alarm annunciator was malfunctioning.

Since the Containment Sump Level Monitoring System was monitored by the auxiliary alarm annunciator, the Containment Sump Level Monitoring System was declared inoperable and action state-l ment 3.4.7.1.b was entered.

1 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:

Component failure.

The auxiliary alarm annunciator was iaoperable due

,[

to the failure of a series of integrated circuit chips.

I'

. ANALYSIS OF OCCURRENCE:

p Technical specification 3.4.7.1 requires:

With only two of the required leakage detection systems i

operable, operation may continue for up to 30 days provided containment atmosphere grab samples are obtained j

and analyzed at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />; otherwise, be in hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in cold shutdown 1

I within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

s

CORRECTIVE ACTION

The requirements of technical specification 3.4.7.1 were complied with.

The annunciator was removed from service. In order to monitor contain-l ment sump level, a meter was connected across the input to'the Auxiliary

' Alarm System from the containment sump pump'to monitor start-stop times l

A series of integrated circuit! chips was replaced.

The annunciator was l-returned to service and-tested satisfactorily.

At 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br />, August 28, 1981, the-Containment Sump Level Monitoring' System was l-declared operable, and action statement 3.4.7.1.b was terminated.

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FAILURE DATA:

~ Rochester Instrument Systems, Inc.

Integrated Circuit Chips i

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Prepared By

- F.

Dickey

/ N %[ [W Manager - S"alem' Generating Station i

SORC Meeting No.

81-94 4

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