05000272/LER-1983-019, Forwards LER 83-019/03L-0.Detailed Event Analysis Encl

Forwards LER 83-019/03L-0.Detailed Event Analysis Encl

ML20023B362
Person / Time
Site:	Salem
Issue date:	04/06/1983
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20023B363	List: 05000272/LER-1983-019, Forwards LER 83-019/03L-0.Detailed Event Analysis Encl 05000272/LER-1983-019-03, /03L-0:on 830315,diesel Fire Pump 2 Failed to Automatically Start on Decreasing Header Pressure & Declared Inoperable.Caused by Loose Wiring Connection on Diesel Engine Starter.Wiring Connection Retightened
References
NUDOCS 8304220379
Download: ML20023B362 (3)

LER-1983-019, Forwards LER 83-019/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721983019R00 - 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 April 6, 1983 Mr.

F.

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

Dear Mr. Haynes:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 83-019/03L Pursuant to the requirements of Salem Generating Station Unit No.

1, Technical Specifications, Section 6.9.1.9.b,

- we are submitting Licensee Event Report for Reportable Occurrence 83-019/03L.

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

Sincerely yours,. Vh$[e~' H. J. Midura General Manager - Salem Operations llfRF:ks CC:- Distribution 8304220379 830406 h} QDRADOCK 05000272 PDR The Energy People 95 2189 p0M) 1181 ,,g >

.Re^ port Number: 83-019/03L Report'Date: 04-06-83 Occurrence Date:- 03-15-83 Facility: Salem Generating Station Unit 1 Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE: Fire Suppression Systems - No. 2 Diesel Fire Pump - Inoperable.

- This report was initiated by Incident Report 83-055 CONDITIONS PRIOR TO OCCURRENCE:

Unit 1 - Mode 5 - Rx Power 0 % - Unit Load 0 MWe. Unit 2 - Mode 6 - Rx Power 0 % - Unit Load 0 MWe, DESCRIPTION OF OCCURRENCE: At 1250 hours, March 15, 1983, during periodic flushing of fire hydrants, an operator observed that No. 2 Diesel Fire Pump failed to automatically start as the fire suppression header pressure decreased. The pump was selected to start first on dccreasing pressure. No. 1

- Fire Pump satisfactorily started, maintaining the fire header pressure.

Subsequent attempts to start No. 2 Fire Pump in the manual mode also failed. The pump was declared inoperable and Technical Specification 3.7.10.1a was entered. APPARENT CAUSE OF OCCURRENCE: Investigation of the problem revealed-that the pump would not start due to a loose wiring connection on the-diesel-engine starter motor. The loose connection may tus related to the installation of a new l starting circuit wiring harness following a failure of the pump on May 26, 1982 (see LER 82-035/99X-0), although no evidence was found to confirm the possibility. ANALYSIS OF OCCURRENCE: The operability of fire suppression systems ensures that adequate fire suppression capability is available to confine and extinguish fires occurring in any portion of the facility where safety related equipment is located. The collective capability.of the fire suppression systems is adequate to minimize potential damage to safety related. equipment and is a major element in the facility fire protection program. Since No. 1 Fire Pump was operable and capable of meeting system flow l requirements in the event of a fire, no risk to the health or safety l of the public was involved. Due to the loss of redundancy of ) equipment necessary for safe operation, the incident constituted operation in a degraded mode permitted by a limiting condition for i l r ...w

LER 83-019/03L ANALYSIS OF OCCURRENCE: (cont'd) operation. The occurrence is therefore reportable in accordance with Technical Specification 6.9.1.9b. Action Statement 3.7.10.1a requires:- With one pump and/or water supply inoperable, restore the inoperable equipment to operable status within 7 days, or prepare ~ and submit a special report to the Commission pursuant to Specification 6.9.2 within the next 30 days, outlining the plans and procedures to be used to provide for the loss of redundancy in the system.

CORRECTIVE ACTION

The loose wiring connection was satisfactorily tightened and the pump started satisfactorily in both the automatic and manual modes. To insure that the pump was operable, it was started three times automatically and three times manually off each starting circuit, for a total of nine satisfactory starts. The pump was declared operable, and at 2100 hours, March 15, 1983, Action Statement 3.7.10.1a was terminated, within the 7 day interval required by the specification. Preventive maintenance of the diesel engine is performed every 18 months as part of the Inspection Order system, and includes a visual inspection for loose electrical connections. The incident will te discussed with appropriate personnel to reinforce the utilization of sound work practices. In view of the seemingly isolated nature of the occurrence, and the apparent adequacy of-existing measures, no further action was deemed necessary. FAILURE DATA: Waukesha Foundry Co., Inc. Diesel Engine Model H-1077-DSU Previous problems with the No. 2 Fire Pump starting circuitry have-occurred but involved a faulty wiring harness and possible failure in the. alternator windings. Issue of a Supplemental Report for the previous occurrence is pending results of investigation of the alternator by the vendor. Prepared By R. Frahm / h Gener'al Manager - SORC Meeting No. 89-042B }}