05000272/LER-1981-037, Forwards LER 81-037/03L-0

Forwards LER 81-037/03L-0

ML18086A449
Person / Time
Site:	Salem
Issue date:	04/28/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18086A451	List: 05000272/LER-1981-037, Forwards LER 81-037/03L-0 05000272/LER-1981-037-03, /03L-0:on 810404,RHR Pump Declared Inoperable. Caused by Leak from Mechanical Seal.Shaft Sleeve O Rings, Throttle Bushing Assembly & Circulating Ring Assembly Replaced
References
NUDOCS 8105080238
Download: ML18086A449 (3)

LER-1981-037, Forwards LER 81-037/03L-0

Event date:
Report date:
2721981037R00 - NRC Website

text

PS!ffiG Public Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 Phone 201/430-7000 Mr. Boyce H. Grier Diredtor of USNRC April 28, 1981 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 81-37/03L 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 81-37/03L.

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

Sincerely yours,

,,( i:Zd~z[

R. A. Uderitz General Manager -

Nuclear Production CC:

Director, Office of Inspection and Enforcement (30 copies)

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

Report Number:

81-37/03L Report Date:

April 28, 1981 Occurrence Date:

4/14/81 Facility:

Salem Generating Station, Unit 1 Public s*ervice Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

RHR Pump Seal Failure CONDITIONS PRIOR TO OCCURRENCE:

Mode 5 -

Rx Power 0% - Unit Load 0 MW DESCRIPTION OF OCCURRENCE:

On April 4, 1981, the No. 12 RHR Pump was declared inoperable be-cause of a leak of approximately 2.5 gpm emanating from the pump's mechanical seal.

Action Statement 3.4.1.4.a was entered at 0017 hours1.967593e-4 days <br />0.00472 hours <br />2.810847e-5 weeks <br />6.4685e-6 months <br />.

The pump was repaired, tested and returned to service at 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> on April 13, 1981.

At 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br /> on April 14, 1981, the pump was again declared inoperable because of a leaking seal and Action Statement 3.4.1.4.a was re-entered at this time.

A new set of "O" rings was installed and the pump was declared operational at 1445 hours0.0167 days <br />0.401 hours <br />0.00239 weeks <br />5.498225e-4 months <br /> on April 16, 1981.

This occurrence constituted operation in a degraded mode I.AW Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The pump's mechanical seal had failed.

ANALYSIS OF OCCURRENCE:

Action Statement 3.4.1.4.a requires that with less than two residual heat removal loops operable, immediately initiate corrective action to return the required loops to operable status as soon as possible.

When the pump was declared inoperable on April 14, 1981, it was disassembled and inspected.

No obvious equipment failure was evident.

However, it is believed that one or both "O" rings had become twisted during the assembly of the pump on April 13, 1981.

New "O" rings were installed, the pump was reassembled, tested satisfactorily and declared operational at 1445 hours0.0167 days <br />0.401 hours <br />0.00239 weeks <br />5.498225e-4 months <br /> on April 16 1981.

LER 81-37/03L 2 -

4/28/81

CORRECTIVE ACTION

A new mechanical seal consisting of the shaft sleeve, shaft sleeve "O" rings, throttle bushing assembly and circulating ring assembly was installed on the pump.

A satisfactory surveillance test was performed and the Action Statement terminated at 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> on April 13, 1981.

When the pump was declared inoperable on April 14, 1981, new "O" rings were installed.

A satisfactory surveillance test was performed and the Action Statement terminated at 1445 hours0.0167 days <br />0.401 hours <br />0.00239 weeks <br />5.498225e-4 months <br /> on April 16, 1981.

FAILURE DATA:

Ingersoll Rand Company Pump Serial #A69-27/28 Part #28758CCX1-B Shaft Sleeve Part #20All-EP-M233 Shaft Sleeve "O" Ring, four replaced Part #24 Throttle Bushing Assembly consisting of Throttle Bushing, Expansion Coil, Springs and Set Screws Part #14 Circulating Ring Assembly Prepared By W. J. Steele Manager - "Salem Generating Station SORC Meeting No.

81-31