05000311/LER-1982-086, Forwards LER 82-086/03L-0.Detailed Event Analysis Encl

Forwards LER 82-086/03L-0.Detailed Event Analysis Encl

ML20063P656
Person / Time
Site:	Salem
Issue date:	09/29/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20063P657	List: 05000311/LER-1982-086, Forwards LER 82-086/03L-0.Detailed Event Analysis Encl 05000311/LER-1982-086-03, /03L-0:on 820915,water Observed Dripping from Oil Level Sightglass on Svc Water Pump Motor.Caused by Failed Motor Bearing Oil Cooler Due to Accelerated Erosion & Corrosion.Failed Cooler Repaired
References
NUDOCS 8210150057
Download: ML20063P656 (3)

LER-1982-086, Forwards LER 82-086/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982086R00 - NRC Website

text

r O PSEG Public Service Electric and Gas Company P.O. Box E 'Hancocks Bridge, New Jersoy 08038 Salem Generating Station September 29, 1982 Mr.

R. C.

Ilaynes l

Regional Administrator USNRC l

Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Ilaynes :

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-086/03L 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 82-086/03L.

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

l Sincerely yours, i

'" O

./

II. J.

Midura General Manager -

Salem Operations RF:ksfe0[

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Distribution i

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l 8210150057 820929 DR ADOCK 05000311 l

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Report Number:

82-086/03L Report Date:

09-29-82' Occurrence Date:

09-15-82 Facility:

Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

No. 24 Service Water Pump - Inoperable.

This report was initiated by Incident Report 82-271.

CONDITIONS PRIOR TO OCCURRENCE:

i Mode 1 - Rx Power 48% - Unit Load 470 MWe.

L DESCRIPTION OF OCCURRENCE:

At 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />, September 10, 1982, during routine operation, water was' observed dripping from the1 oil level sightglass on No. 24 Service Water Pump motor.

The pump'was declared inoperable, and with No. 25 Service Water Pump already in-operable for planned maintenance, Action Statement 3.7.4 was entered.

The redundant service water loop was operable throughout the occurrence.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Investigation of the problem revealed that the motor bearing oil cooler had failed.

Accelerated erosion and corrosion of the cooler were caused by silt particles in the service water and dissimilar metals in the system piping.

l ANALYSIS OF OCCURRENCE:

Operability of the service water, system ensures that sufficient cooling capacity is available for continued operation of safety related equipment during normal and accident conditions.

The redundant cooling capacity.of this system is' consistent with assumptions used in the accident analyses.

As noted, the redundant loop was operable, therefore, no risk to l

the health or safety of the public was involved.

The occurrence constituted operation in a degraded mode permitted by a limiting condition for operation, and is reportable in accordance with Technical Specification 6.9.1.9.b.

?

J 2

4

LER 82-086/03L -

a.

ANALYSIS OF OCCURRENCE:Action Statement 3.7.4 requires:

With only one service water loop operable, restore at least two loops 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 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

Maintenance was completed on No. 25 Service Water Pump, and the pump was satisfactorily tested.

No. 25 Service Water Pump was declared operable and Action Statement 3.7.4 was terminated at 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br />, September 10, 1982.

The failed cooler on No. 24 Service Water Pump was repaired utilizing Belzona metal filler.

A new design cooler will be installed at the overhaul of the pump motor during-the next refueling.

FAILURE DATA:

Allis Chalmers Vertical Solid Shaft 1000 HP Motor Bearing Oil Cooler Similar failures of other coolers supplied by service water have occurred; the problem has been successfully addressed by installation of components fabricated of materials better suited to use in the service water system.

Prepared By R.

Frahm f

Gsnetal/ Manager -

Salem Operations SORC Meeting No.

82-87 i

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