05000311/LER-1981-050, Forwards LER 81-050/03X-1.Detailed Event Analysis Encl

Forwards LER 81-050/03X-1.Detailed Event Analysis Encl

ML20054L676
Person / Time
Site:	Salem
Issue date:	06/23/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20054L677	List: 05000311/LER-1981-050, Forwards LER 81-050/03X-1.Detailed Event Analysis Encl
References
NUDOCS 8207080353
Download: ML20054L676 (3)

LER-2081-050, Forwards LER 81-050/03X-1.Detailed Event Analysis Encl

Event date:
Report date:
3112081050R00 - NRC Website

text

4 O PSEG Put>lic Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jcrsey 08038 Salem Generating Station June 23, 1982 Mr. R. C. Ilaynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Ilaynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-50/03X-1 SUPPLEMENTAL REPORT Pursuant to the requirements of Salem Generating Station Unit No. 2 Technical Specifications, Section 6.9.1.9.b, we are submitting supplemental Licensee Event Report for Reportable Occurrence 81-50/03X-1.

l Sincerely yours,

'fc "%

! II . J. Midura General Manager -

Salem Operations RF:ks7 CC: Distribution 8207080333 820623 i PDR ADOCK 05000311 1 S PDR l

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The Energy People toe, um, o m I

3 Report Number: 81-50/03X-1 s ,{

. t Report Date: 06-23-82 ' -

x Occurrence Dates: 6-25-81, 7-1-81, 7-13-81 and 7c15"81 v u K 4 s~ y Facility: Salem Generating Station, Unit 2- . \, '

Public Service Electric & Gas Companyt '_

Hancocks Bridge, New Jersey 08038 - .

L ,l IDENTIFICATION OF OCCURRENCE:

2B Diesel Generator Start Time Failures. '

a' ,

i This report is initiated by Incident Reports. 81-21'3,!81-227,<81-245 '

! and 81-256.

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CONDITIONS PRIOR TO OCCURRENCE: i 6-25 Mode 3 - Rx Power 0% - Unit Load 0 MWe s, ,

7-01 Mode 1 - Rx Power 29% - Unit Load 180 MWe (~

1 '

7-13 Mode 2 - Rx Power 3% - Unit Load 0 MWe /

7-15 Mode 1 - Rx Power 40% - Unit Load 240 MWe -

-s DESCRIPTION OF OCCURRENCE:

! During the performance of surveillance procedure SP(O) 4.8.1.1.2, on the above indicated occurrence dates, 2B diesel generator failed .to meet the starting time requirements, < 10 seconds, of technical specifi-t cation 3.8.1.1. The starting times, in order of occurrence dates, were 13 seconds, 13 seconds, 12 seconds and 12.3 seconds. On each occasion, 2B diesel generator was declared inoperable and action statement 3.8.1.1.a was entered and the provisions of the action statement were complied with.

These occurrences constituted operation in a degraded mode in accord-ance with technical specification 6.9.1.9.b.

l DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Equipment failure. The two redundant turbo boost air supply solenoids l

for 2B diesel generator were inoperable. One of the solenoids had l been improperly wired on a previous, still unknown, date. The other i

solenoid failed, rendering the diesel turbo boost system inoperable.

l The loss of the turbo boost air system caused the start time of the I

diesel to increase by approximately 4 seconds, above the normal start time.

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LER 81-50/03X-1. ,

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i , ANALYSIS OF OCCURRENCE: '

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1. Technical Specification 3.8.1.1.a requires:

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With either an sffsite^ circuit' or diesel generator inoperable, s demonstrate'the operability of the remaining A.C. sources by

.s .,s performing survejilance requirements 4.8.1.1.1.a and 4.0.1.1.2.a.2

-7'Ytithin one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter, re-s

' store at ieast two offsite circuits and three diesel generators to. operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> er be in at least hot stand-by wit %in 9he 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 a -

fpiloving 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

' s s CORRECTIVE ACTION: ,

,, On all of the occurrence dates, except, July 13, 1981, a work order was issued.for investigation and repair of 2B diesel generator. The i results of the June 25 investigation revealed a failed air starter motor and the motor was replaced in kind. On July 1, the slow starting

time was attributed to lack of fuel rack lubrication and the fuel rack I

was lubricated and exercised. On July 13, the diesel was restarted and j the second start time was less than 10 seconds. On July 15, the re-dundant turbo boost air supply solenoids were discovered to be inoperable.

One solenoid was improperly wired, rendering it ino'perable. The other solenoid had failed. It appears that the solenoid that was properly wired had been failing to operate on an intermittent bnsis. The failed t

solenoid was replaced in kind and the improperly wired solenoid was properly wired. On each occurrence, after problem corrections had

been made, the 2B diesel generator was tested satisfactorily, declared operab.le and acti,on statement 3.8.1.la was terminated.

The only fai' lures'foudd to be repetitive in Eafety Evaluation S-2-E300-MSE-1L7, Rerisl ion "0", are failures to accelerate to 900 RPM within 10 seconds, and have been attributed to (the turbo boost system.

(

Sincethelastr6pairoftheturboboost[airsupplysolenoidson July 15, 1981, recommendations,and found the in implementation PSE&G Engineering of the andpreventive maintenance Construction Depart-j ment Safety Evaluation S-2-E300-MSE-ll7, Revision "0", the 2B diesel generator has been satisfactorily tested in accordance with the provisions of Technical Specification 3.8.1.1, with no failures.

FAILURE DATA: i ASCO Solenoid Valves Prepared By R. H611er /e[h General' Mdnag'er -

IW Salem Operations SORC Meeting No. 82-63

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