05000311/LER-1982-095, Forwards LER 82-095/03L-0.Detailed Event Analysis Encl

Forwards LER 82-095/03L-0.Detailed Event Analysis Encl

ML20065E205
Person / Time
Site:	Salem
Issue date:	09/16/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20065E209	List: 05000311/LER-1982-095, Forwards LER 82-095/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8210010045
Download: ML20065E205 (3)

LER-1982-095, Forwards LER 82-095/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982095R00 - NRC Website

text

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O PSEG Public Service Efectric ano Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station September 16, 1982

'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 REPORTABLE OCCURRENCE 82-095/03L 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 82-095/03L.

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

Sincerely yours,

/

D&

~

H.

J.

Midura General Manager -

Salem Operations RH:ks[

CC:

Distribution 0210010045 820916 PDR ADOCK 05000311 S

PDR The Energy People T6 tv2 21sg (N V! 1141

jh Report Number:

82-095/03L Report Date:

09-16-82 Occurrence Date:

08-31-82 Facility:

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

Auxiliary Feedwater System - No. 23 Auxiliary Feedwater Pump -

Inoperable.

This report is initiated by Incident Report 82-241.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 82% - Unit Load 900 MWe.

DESCRIPTION OF OCCURRENCE:

On August 31, 1982, radiography surveillance revealed that the disc was not in place in Valve 21 MS46, a check valve in the steam line to No. 23 Auxiliary Feedwater Pump (AFP).

No. 23 AFP was declared inoperable and Limiting Condition for Operation Action Statement 3.7.1.2a was entered at 1724 hours0.02 days <br />0.479 hours <br />0.00285 weeks <br />6.55982e-4 months <br />.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Investigation revealed that the stud which attaches the valve disc to the hanger had sheared off.

An engineering evaluation is being performed to determine the mechanism of failure.

d ANALYSIS OF OCCURRENCE:

~

The operability of the Auxiliary Feedwater System ensures that the Reactor Coolant System can be cooled down to less than 350 F from normal operating conditions in the event of a total loss of offsite power.

The Auxiliary Feedwater System in each unit is equipped with two parallel pumping systems for redundancy.

It is designed such that should either pumping systems become inoperable the redundant system is fully capable of cooling down the unit.

The redundant Auxiliary Feedwater System was operable throughout the occurrence.

Therefore, this occurrence involved no risk to the health and safety of the general public.

LER 82-095/03L.y Jr ANALYSIS OF OCCURRENCE:Action Statement 3.7.1.2a requires:

With one Auxiliary Feedwater Pump inoperable, restore the required 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 at least hot stand-by 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 hot shutdown within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

Therefore, inoperability of one Auxiliary Feedwater Pump consti-tuted 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.

CORRECTIVE ACTION

As noted, the stud which attached the valve disc to the hanger had sheared off.

The valve hanger and disc assembly were replaced and the valve was tested satisfactorily.

No. 23 Auxiliary Feed-water Pump was declared operable and Limiting Condition for Operation Action Statement 3.7.1.2a was terminated at 0045 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br />, September 3, 1982.

An engineering analysis is being conducted to determine the mechanism of failure.

FAILURE DATA:

Velan Valve Corporation 6" Swing Check Valve Type B142114B2TS 5

Prepared By R.

Heller General M& nager -

SORC Meeting No.

82-84