05000311/LER-1982-151, Forwards LER 82-151/03L-0.Detailed Event Analysis Encl

Forwards LER 82-151/03L-0.Detailed Event Analysis Encl

ML20028C827
Person / Time
Site:	Salem
Issue date:	01/03/1983
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028C828	List: 05000311/LER-1982-151, Forwards LER 82-151/03L-0.Detailed Event Analysis Encl 05000311/LER-1982-151-03, /03L-0:on 821206,during Normal Operation, Containment Particulate Radioactivity Monitor Discovered Malfunctioning.Caused by Intermittent Connection on One Digital Component.Component Reseated
References
NUDOCS 8301140185
Download: ML20028C827 (3)

LER-1982-151, Forwards LER 82-151/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982151R00 - NRC Website

text

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O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 4

Salem Generating Station January 3, 1983 Mr.

R.

C.

Haynes Regional Administrator USNRC Region 1 631' Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. DP R-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-151/03L 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 82-151/03L.

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

Sincerely yours, f-H.

J. Midura General Manager -

Salem Operations RF:ks df CC:

Distribution 8301140185 830103

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PDR ADOCK 05000311 S

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- The Energy People I

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Re*po$th Number:-

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182 151/030

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Report Dates; 29-82 Occurrence:Date:1 /12-06-821 c

4 Facility:D Salem Generating. Station, Uni $ 2i

- Public Service l Electric;& GasLCompany-

- Hancocks Bridge,.-New-Jersey' 08038-IDENTIFICATION'OF OCCURRENCE:

Radiation (Monitoring Systems ~-- Containment Particulate-4 Monitor -' Inoperable.-

This.reportiwas initiated by Incident Report'82-506.

' CONDITIONS' PRIOR TO OCCURRENCE:,

Mode 1

'Rx Power 82% - Unit - Load' 9 20 MWe.

DESCRIPTION OF OCCURRENCE:

At'1501 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.711305e-4 months <br />, December 6,- 1982, during routine operation, the-Control Room Operator discovered-that the containment particulate-

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radioactivity monitor. (Channel 2RllA) had malfunctioned.

The-channel' digital display indicated it was electronically locked Eup.

The instrument was declared inoperable and Limiting Condition for Operation 3.3.3.1 Action 24 was entered. 'The redundant Reactor Coolant System (RCS) leak detection systems, including the Containment Sump Monitoring System and the containment gaseous activity and fan cooler condensate flow rate instruments, were operable throughout the occurrence.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The channel was powered down then re-energized to. reset the-logic; instrument response and power supply voltages checked satisfactorily.

Major integrated circuits and circuit boards were reseated.

The channel tested satisfactorily and was returned to operation.. No further problems have been noted, and the occurrence was assumed.to involve an intermittent connection on one of the components which were reseated.

ANALYSIS OF OCCURRENCE:

Operability of the containment particulate monitor insures that the levels of radioactivity in the containment atmosphere are continually measured. 'As noted, the redundant RCS leak detection

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systems were operable and radioactivity levels in the containment were continuously monitored by the containment gaseous monitor.

i The event therefore involved no risk to the health and safety of i

the public.

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i m.m_

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,LER ' 8 2-151/0 3L. -

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' ANALYSIS OF OCCURRENCE:

.(cont'd)

TLimiting-Condition for.-Operation 3.3.3.1' Action 24. requires:.

With"the number'of channelsfoperable less than~the minimum number of channels operable required,. 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 />; otherwise be in at least 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 within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

CO'RRECTIVE ACTION:

Following satisfactory testing, Channel 2RllA was -declared operable, and at'2139 hours0.0248 days <br />0.594 hours <br />0.00354 weeks <br />8.138895e-4 months <br />, December 6, 1982, Limiting Condition for Operation 3.3.3.1 Action 24 was terminated.

As stated, since reseating of the integrated circuits and boards, no-further problems were noted.

Intermittent connections in digital electronics circuitry on an isolated basis are not unusual.

In view of-the nature of.the occurrence, no furtner action was' deemed necessary.

FAILURE DATA:

A previous similar occurrence involving the containment gaseous activity monitor was documented.in LER 82-133/03L.

Victoreen Instrument Div.

Controller Module Model 866CD Prepared By R.

Frahm s

General Managet -

Salem Operations SORC Meeting No.82-114 e