05000272/LER-1983-016, Forwards LER 83-016/03L-0.Detailed Event Analysis Encl

Forwards LER 83-016/03L-0.Detailed Event Analysis Encl

ML20072D951
Person / Time
Site:	Salem
Issue date:	03/10/1983
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20072D953	List: 05000272/LER-1983-016, Forwards LER 83-016/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8303210522
Download: ML20072D951 (3)

LER-2083-016, Forwards LER 83-016/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2722083016R00 - NRC Website

text

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O PSEG Public Service Electric and Gas Company . P.O. Box E Hancocks Bridge, New Jersey 08038  !

Salem Generating Station March 10, 1983 Mr. R. C. Haynes.

Regional ~ Administrator USNRC Region 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. .DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 83-016/03L Pursuant to the requirements of Salem Generating Station Unit No. 1, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 83-016/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours,

/l , &bW' H. J. Midura General Manager -

Salem Operations RF:ks Il f CC: Distribution fh S

0 Y

h The Energy People

3 Repoqrt Number _: . 83-016/03L

. -: Report Date: 03-07-83 r0ccurrence'Date:. 02-11-83' l Facility:. l Salem Generating -Station Unit 1 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038.

' IDENTIFICATION OF' OCCURRENCE:

Radiation Monitoring Instrumentation - Containment AirEParticulate l Monitor - Inoperable.:

~

This report 1was initiated by Incident Report 83-041.

-CONDITIONS PRIOR TO OCCURRENCE:

-Mode.3i- RX Power 0 5' Unit Load 0 MWe.

DESCRIPTION OF OCCURRENCE:

' At 0450 hours0.00521 days <br />0.125 hours <br />7.440476e-4 weeks <br />1.71225e-4 months <br />, February 11, 1983, during routine operation, the Control Room Operator discovered that the Containment Air Particulate Monitor (Channel-1R11 A) . indicated off-scale low. The monitor was declared inoperable and Technical Specification Limiting Condition for Operation 3.3.3.1 Action 20 was entered.

Redundant Reactor Coolant System (RCS) leak detection systems, including the containment gaseous activity monitor and fan cooler condensate flow rate instrument, were operable throughout the occurrence. .A grab sample of the containment atmosphere was immediately obtained and analyzed.

APPARENT CAUSE OF'OCCURRELGE:

Investigation of the problem revealed that the signal /high voltage cable was open in the' cable connector at the scintillation detector.

The cable had apparently been strained by personnel in the conduct of unrelated maintenance in the vicinity of the detector enclosure.

Since. problems had also recently been encountered with condensation in i the similar connector on Radiation Monitor 1R12B, the decision was made to remake.the cable end with a new connector.

ANALYSIS-OF OCCURRENCE:

Operability of the containment air particulate monitor insures that

. .the levels of airborne particulate radioactivity in the containment L atmosphere are continually measured. The channel also functions as an RCS-leak-detection system.

, As'noted, the redundant RCS leak detection systems were operable and radioactivity levels in the containment were continuously monitored by

(- 'the containment gaseous activity monitor. The event therefore involved no risk - to the health and safety of the public. Due to the i

i sg LER . 83-016/ 03 L - ANALdSIS OF OCCURRENCE: (cont'd) loss of redundancy, the event constituted operation in a degraded mode in accordance with a limiting condition for operation. The occurrence

.is reportable'in accordance with Technical Specification 6.9.1.9b.

' Limiting Condition for. Operation 3.3.3.1-Action 20 requires:

$ - WithLone of the RCS' leak detection systems inoperable, operation may' continue for up to thirty days, provided that grab samples of the containment atmosphere are obtained 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 />, when the required gaseous and/or particulate radioactivity monitoring system is inoperable; otherwise be in at least hot standby within the next 6' hours and in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

CORRECTIVE ACTION:

The connector was replaced and Radiation Monitor 1R11 A was satisfactorily tested. The channel was declared operable, and at l 1440-hours, February 12, 1983, Limiting Condition for Operation 3.3.3.1 Action 20 was terminated.

As part of a continuing effort to maintain good work practices and focus the awareness of station personnel'on nuclear safety, discussion of the incident will be incorporated into the station training program.

FAILURE DATA:

. A similar failure of the monitor had occurred December 29, 1982 I

(see LER 82-092/03L). Due to the . similarity of the f ailure J

symptoms and nature of the corrective action, the problems may have been related.

a Prepared By R. Frahm // #f h -

General ' Manager -

SORC Meeting No.83-028 i

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