05000311/LER-1982-114, Forwards LER 82-114/03L-0.Detailed Event Analysis Encl

Forwards LER 82-114/03L-0.Detailed Event Analysis Encl

ML20066A774
Person / Time
Site:	Salem
Issue date:	10/20/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20066A777	List: 05000311/LER-1982-114, Forwards LER 82-114/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8211060213
Download: ML20066A774 (3)

LER-2082-114, Forwards LER 82-114/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3112082114R00 - NRC Website

text

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~0 PSidG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge. New Jersey 08038 Salem Generating Station October 20, 1982 1

Mr. R. C. Haynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICE"SE NO. DPR-7 5 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-ll4/03L r Pursuant to the requirements of Salero Generating Station Unit No. 2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable l

Occurrence 82-ll4/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours,

} \t/fC H. J. Midura General Manager -

Salem Operations RH:ks 'f CC: Distribution 8211060213 821020 PDR ADOCK 05000311 PDR i

S The Energy People gWg 95 2189 (20W 1181

Report Number: 82-ll4/03L Report Date : 10-20-82 Occurrence Date: 09-27-82 Facility: Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Radiation Monitoring System - Channels: RllA, R12A, R12B -

Inoperable.

This report was initiated by Incident Report 82-309.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 82% - Unit Load 910 MWe.

DESCRIPTION OF OCCURRENCE:

At 0956 hours0.0111 days <br />0.266 hours <br />0.00158 weeks <br />3.63758e-4 months <br />, September 27, 1982, during performance of routine maintenance, a technician discovered that the Containment Radiation Monitoring System (RMS) APD drive unit was broken.

The RMS Channels RllA, R12A, and R12B were declared inoperable, and Limiting Condition for Operation Action Statement 3.3.3.1 Actions 24 and 25, were entered at 0956 hours0.0111 days <br />0.266 hours <br />0.00158 weeks <br />3.63758e-4 months <br />.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

-Investigation revealed that the pin which attaches the solenoid arm to the ratchet cog had slipped out of position, disconnecting the ratchet cog from the solenoid arm. The pin had been installed through the bottom instead of the top of the connecting sleeve.

ANALYSIS OF OCCURRENCE:

The Containment Radiation Monitoring System (RMS) provides indication of the concentration of radioactive gas and particulates in the containment atmosphere for the purpose of detecting reactor coolant system leakage. It is also used to ensure that the release rate during purging or pressure relief is maintained below limits specified in the Technical Specifications. A high radiation level initiates automatic closure of the containment purge duct and pressure relief isolation valves. Redundant Reactor Coolant-System (RCS) leak detection capability is provided by the Containment Sump Monitoring System.

_ __ _ _ . _ _ _ _ ~ . - _ _ . _

LER 82-ll4/03L -

d ANALYSIS OF OCCURRENCE: (continued)

Backup for the containment purge and pressure relief radiation monitoring function is provided by the Plant Vent Effluent Monitor 2R16, and relies on operator action.to isolate the vent path. . Failure of the' Containment' Radiation Monitoring System,

'therefore, constitutes operation-in a degraded mode permitted by a Limiting Condition for Operation and is reportable in accordance with Technical Specification 6.9.1.9.b. The containment purge and 4 pressure relief isolation valves were maintained closed, and backup

[ monitoring' capability was maintained. Therefore, this occurrence' involved no risk to the health and safety of the general public.

i Limiting Condition for Operation 3.3.3.1.b Action 24 requires:

With.only two of the RCS leakage detection systems.

i operable, operation may continue for up to 30 days provided grab samples of the containment atmopshere 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 /> j- when the required gaseous and or particulate monitoring j~

system in. inoperable; otherwise be in at least hot  :

standby within the next E 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 />.

l Action 25 requires:

2 With the containment purge and pressure vacuum relief isolation system inoperable, close each of-the purge and pressure relief penetrations providing direct  !

} access from the containment to the outside atmosphere. l CORRECTIVE ACTION:

The pin was reinstalled in the connecting sleeve from the top down,  ;

i and the unit was tested satisfactorily. Therefore, at 1115 hours0.0129 days <br />0.31 hours <br />0.00184 weeks <br />4.242575e-4 months <br />, .

September 27, 1982, RMS Channels RllA, R12A,-and'R12B were declared t operable, and Limiting Condition for Operation Action Statement  !

} 3.3.3.1.b Actions 24 and 25 were terminated FAILURE DATA:

Not Applicable.

4 l Prepared By R. Heller [L

' General Manager -

SORC Meeting No.

82-94B~

A

)

1

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