05000311/LER-1982-076, Forwards LER 82-076/03L-0.Detailed Event Analysis Encl

Forwards LER 82-076/03L-0.Detailed Event Analysis Encl

ML20027A993
Person / Time
Site:	Salem
Issue date:	08/25/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20027A994	List: 05000311/LER-1982-076, Forwards LER 82-076/03L-0.Detailed Event Analysis Encl 05000311/LER-1982-076-03, /03L-0:on 820806,operator Received Indication of Containment Gas Monitor Sys,Channel 2R12A,malfunction.Caused by Failure of Test Jack Due to Improper Electrical Connection of Detector & Meter.Test Jack Replaced
References
NUDOCS 8209160247
Download: ML20027A993 (3)

LER-1982-076, Forwards LER 82-076/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982076R00 - NRC Website

text

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Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station August 25, 1982 Mr.

R.

C.

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

Dear Mr. Haynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-076/03L 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 82-076/03L.

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

Sincerely yours,

, y

• bu ~a H.

J. Midura General Manager -

Salem Operations c)[

RH:ks CC:

Distribution B209160247 820825 PDR ADOCK 05000311 S

PDR The Energy People

'I wm, uow n ai 4

i Report Number:

82-076/03L Report Date:

08-25-82 Occurrence Date:

08-06-82 Facility:

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

Containment-Gas Radiation Monitor - Inoperable.

This report was initiated by Incident Report 82-210.

CONDITIONS PRIOR TO OCCURRENCE:

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

DESCRIPTION OF OCCURRENCE:

On August 6, 1982, at 1515 hours0.0175 days <br />0.421 hours <br />0.0025 weeks <br />5.764575e-4 months <br />, during routine operation, the. Control Room Operator received indication of malfunction of Containment-Gas Radiation Monitor System, Channel 2R12A.

The monitor was declared inoperable and Technical Specification Limiting Condition for Operation Action Statement 3.3.3.lb Actions 24 and 25 were entered at 1515 hours0.0175 days <br />0.421 hours <br />0.0025 weeks <br />5.764575e-4 months <br />.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Investigation into the cause of the Channel 2R12A malfunction revealed that the test jack had failed.

The test jack is directly in the signal line between the detector and meter.

When the test jack failed, it prevented proper electrical connection of the meter and detector, causing an erroneous meter indication.

ANALYSIS OF OCCURRENCE:

The Containment-Gas Radiation Monitor provides indication of the concentration of radioactive gas and particulate in contain-ment for the purpose of detecting Reactor Coolant System (RCS) le ak. age.

It is also used to ensure that the release rate during purging or pressure relief is maintained below limits specified by the Technical Specifications; a high radioactivity level initiates automatic closure of the containment purge duct and pressure relief isolation valves.

LER 82-076/03L o e

ANALYSIS OF OCCURRENCE:Redundant RCS leak detection capability is provided by the Containment Sump Monitoring System.

Backup for the contain-ment purge and pressure functions is provided by the Plant Vent Monitor 2R41C, although the setpoints have to be lowered for this purpose.

Failure of the Containment Atmosphere Monitor, 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.

Due to backup monitoring capability, the event resulted in no risk to the health and safety of the general public.

Limiting Condition for Operation 3.3.3.1.b Action 24 requires:

With only two of the RCS leakage detection systems operable, operation may continue for up to 30 days provided 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 monitoring system is inoperable; otherwise be in at least het 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 />.

Action 25 requires:

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.

CORRECTIVE ACTION

The conta3= ment purge duct and pressure relief isolation valves were

'intained closed in accordance with operating instructions, -

compliance with the limiting condition for operation.

The

..t jack was replaced, and a channel cali-bration check was.Ttisfactorily performed.

The Containment-Gas Radiation Monitor wa, declared operable and Technical Speci-fication Limiting Con ' tion for Operation 3.3.3.lb Actions 24 and 25 were terminated at 2.'5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />, August 6, 1982.

FAILURE DATA:

Victoreen Corporation Scaler Module 8625 Test Jack l

r Prepared By R.

Heller General Manager -

Salem Operations SORC Meeting No.

82-78 i

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