05000311/LER-1982-123, Forwards LER 82-123/03L-0.Detailed Event Analysis Encl

Forwards LER 82-123/03L-0.Detailed Event Analysis Encl

ML20066E024
Person / Time
Site:	Salem
Issue date:	10/27/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20066E026	List: 05000311/LER-1982-123, Forwards LER 82-123/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8211120386
Download: ML20066E024 (3)

LER-2082-123, Forwards LER 82-123/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3112082123R00 - NRC Website

text

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Pub!ic Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station October 27, 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 82-123/03L 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 82-123/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours, H. J. Midura f

l General Manager -

Salem Operations RF:ks

[

CC: Distribution 8211120386 G21027 PDR ADOCK 05000311 E PDR The Energy People I E2189 (20M) 1181

Report Number: 82-123/03L Report Date: 10-27-82 Occurrence Date: 10-10-82 Facility: Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

No. 21 Containment Fan Coil Unit - Inoperable.

This report was initiated by Incident Report 82-346.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 82% - Unit Load 900 MWe.

DESCRIPTION OF OCCURRENCE:

At 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br />, October 10, 1982, during routine surveillance, the Control Room Operator discovered that service water flow to No. 21 Containment Fan Coil Unit (CFCU) was 2400 GPM, less than the 2500 GPM required in low speed operation. No. 21 CFCU was declared inoperable, and Technical Specification Action Statement 3.6.2.3.a was entered. Both containment spray systems were operable throughout the occurrence.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Investigation of the problem revealed that the setpoint on the

flow controller at the local service water control panel was low. The controller tested satisfactorily, and no reason for j the setpoint change was discovered. No problems of a similar l

nature have occurred recently. A low setpoint could result l from controller drift or from local operation of the setpoint adjustment by any unidentified individual, although no evidence was found pointing to either of these possibilities.

ANALYSIS OF OCCURRENCE:

The CFCU's operate in conjunction with the containment spray systems to remove heat and radioactive contamination from the containment atmosphere in the event of a design basis accident.

Operability of this equipment is necessary to ensure offsite radiation dose is maintained within the limits of 10CFR100.

l l Because containment cooling capability was provided by redundant CFCU's and the containment spray systems, the occurrence involved no risk to the health or safety of the public. The event constituted operation in a degraded mode permitted by a limiting condition for operation and is reportable in accordance with Technical Specification 6.9.3.9.b.

e-LER 82-123/03L .

• ANALYSIS OF OCCURRENCE: (continued)

Action Statement 3.6.2.3.a requires:

With one group of CFCU's inoperable and both contain-ment spray systems operable, restore the inoperable l group of cooling fans to operable status within 7 days, or 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 />.

CORRECTIVE ACTION:

The flow controller setpoint was adjusted to 2750 GPM, and No. 21 CFCU was satisfactorily tested. No further problems with the unit were noted. The CFCU was declared operable at 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br />, October 11, 1982, and Action Statement 3.6.2.3.a was terminated.

To address the possibility that the controller was operated locally, discussion of the incident and its safety implications will be incorporated into the station training program. Controller drift is a natural phenomenon involving largely external factors and requiring no further action.

FAILURE DATA:

Not Applicable.

Prepared By R. Frahm / M-g/ ' General' Manager -

Salem Operations SORC Meeting No. 82-96 4