05000311/LER-1982-130, Forwards LER 82-130/03L-0.Detailed Event Analysis Encl

Forwards LER 82-130/03L-0.Detailed Event Analysis Encl

ML20067B476
Person / Time
Site:	Salem
Issue date:	11/17/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20067B479	List: 05000311/LER-1982-130, Forwards LER 82-130/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8212060202
Download: ML20067B476 (3)

LER-2082-130, Forwards LER 82-130/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3112082130R00 - NRC Website

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D PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station November 17, 1982 i

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 RE?ORTABLE OCCURRLNCE 82-130/03L 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 82-130/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours, H. J. Midura General Manager -

Salem Operations RF:ks ,d[

,' CC: Distribution 4

0212060202 821117 l PDR ADOCK 05000311 l S PDR i

The Ener0y People f,b

% 218) COM61181

Report Number: 82-1 H/03L Report Date: 11-17-82 Occurrence Date: 10/31/82 Facility: Salem Generating Station Unit 2 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCPRRENCE:

No. 23 Containment Fan Coil Unit - Inoperable.

This report was initiated by Incident Reports82-378 and 82-426.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - RX Power 82% - Unit Load 910 MWe DESCRIPTION OF OCCURRENCE:

On two separate occasions, at 0430 hours0.00498 days <br />0.119 hours <br />7.109788e-4 weeks <br />1.63615e-4 months <br />, October 31, 1982, and at 0240 hours0.00278 days <br />0.0667 hours <br />3.968254e-4 weeks <br />9.132e-5 months <br />, November 5, 1982, the Control Room Operator observed that No. 23 Containment Fan Coil Unit (CFCU) service water flow was slightly less (approximately 2450GPM) than the 2500GPM required by the Technical Specifications in the low speed mode of operation. In each case Action Statement 3.6.2.3a was entered, retroactive to the time of discovery. Both containment spray systems were operable throughout the occurrence.

APPARENT CAUSE OF OCCURRENCE:

Subsequent to the occurrence on October 31, a service wate: leak was detected in a cooling coil of No. 23 CFCU (See LER 82-128/0lT) . Upon l

l completion of repair of the leak, on November 2, 1982, the unit was i returned to service and was satisfactorily tested in both high and low speed modes of operation.

j In the second instance, during investigation of the low flow, the CFCU was cycled into the low speed mode by the instrument technician and the flow rate was observed to be within specification. In both cases,

, the cause of the low service water flow was assumed to be silt l clogging Back Pressure Control Valve 23SW57; cycling of the valve l

during the subsequent maintenance flushed out the silt.

1 ANALYSIS OF OCCURRENCE:

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

i Action Statement 3.6.2.3a Requires:

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ANALYSIS OF_ OCCURRENCE: (cont'd)

With one group of the above required cooling fans inoperable and both containment spray systems operable, restore the inoperable 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 />.

Containment cooling capability was provided by the redundant CFCU's and the containment spray systems. The occurrence, therefore involved no risk to the health and safety of the public. Due to the loss of redundancy in engineered safety features, the event constituted operation in a degraded mode permitted by the limiting conditions for operation. The occurrence is reportable in accordance with Technical Specification 6.9.1.9b.

CORRECTIVE ACTIQH:

As noted above, maintenance on the service water leak in the first instance apparently corrected the problem. The CFCU was tested satisfactorily, and the unit was declared operable. Action statement 3.6.2.3a was terminated at 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br />, November 2, 1982.

In the second instance, starting the CFCU apparently corrected any flow problem which had existed. The CFCU was tested satisfactorily, returned to service and Action Statement 3.6.2.3a was terminated at 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br />, November 5, 1982. In view of the nature of the occurrences, no further corrective action was deemed necessary.

FAILURE QAIA:

Not applicables Prepared by R. Frahm A/ bd I Geder61 Manager -

l SORC Meeting No. 82-102B l

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