ML18078A637

Forwards LER 78-083/03L-0

ML18078A637
Person / Time
Site:	Salem
Issue date:	01/10/1979
From:	Librizzi F Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18078A638	List: ML18078A637 ML18078A639
References
NUDOCS 7901160204
Download: ML18078A637 (3)

Text

F e OPS~G Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 January 10, 1979 Mr. Boyce H. Grier Director of USNRC Off ice of Inspection and Enforcement

.Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-83/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 78-83/03L. This report is required within thirty {30) days of the occurrence.

Sincerely yours, F. P. Librizzi General Manager -

Electric Production CC: Director, Office of Inspection and Enforcement (30 copies)

Director,. Office of.Management Information and Program Control (3 copies)

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.e Report Number: 78-83/03L Report Date: 01/10/79 Occurrence Date: 12/13/78 Facility: Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

No. 13 Auxiliary Feed Pump Overspeed Trip CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 3 Reactor Trip Recovery DESCRIPTION OF OCCURRENCE:

At 1258 on 12-13-78, during recovery from a reactor trip, No. 13 Auxiliary Feed Pump started as required, but tripped on overspeed. No. 11 and 12 Auxiliary Feed Pumps operated satisfactorily. The Action Statement for Technical Specification 3.7.1.2 was implemented and Performance Department was notified. At 2045, functional tests showed operation of the turbine governor to be unsatisfactory. A Woodward Governor field representative was requested for on site technical assistance during troubleshooting and rework of the turbine controls. At 2010, 12-14-78, cooldown of the plant commenced to facilitate planned maintenance activities requiring the unit to be in Cold Shutdown. The unit entered Mode 4 at 0515 and entered Mode 5 at 0858 on 12-15-78. At 2325 on 12-19-78, a functional test of No. 13 Auxiliary Feed Pump showed proper operation of the governor controls and the Ac.tion Statement was terminated.

APPARENT CAUSE OF THE OCCURRENCE:

No. 13 Auxiliary Feed Pump.normal operating turbine speed is 3840 rpm with an overspeed trip at 5000 rpm. Normal control range of the governor is between 1500 and 4000 rpm. Troubleshooting the governor assembly showed that the operating speed was set at 4200 rpm, resulting in excessive overshoot during starting and subsequent tripping on overspeed.

ANALYSIS OF THE OCCURRENCE:

Technical Specification 3.7.1.2 requires that with one Auxiliary Feed-water Pump inoperable, restore at least three Auxiliary Feedwater Pumps to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in Hot Shutdown within the next 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. While troubleshooting of the governor was in progress, additional maintenance was found to be required on secondary components and the unit was taken to the Cold Shutdown mode. No. 11 and 12 Auxiliary Feed Pumps provide redundant operation during this occurrence.

LER 78- S3/03L *

/CORRECTIVE ACTION:

The governor speed control was reset to the manufacturer's specified speed of 3835 rpm. A slack condition in the governor control linkage was reduced by replacement of a sliding bushing. Three full speed functional tests were successfully run with the discharge valves fully open to verify operability of the turbine governor control.

FAILURE DATA:

Woodward Type PG-PL Governor Woodward Governor Company Ft. Collins, Colorado Prepared by A. W. Kapple Manager -"'Salem Genel?a ting Station SORC Meeting No. 1-79

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