ML17348B450

LER 92-002-00:on 920302,emergency Diesel Generator 4B Declared Inoperable Due to Inadequate Surveillance of Valve 3434B on 920130.Caused by Personnel Error.Surveillance Procedures Revised & Review Process examined.W/920331 Ltr

ML17348B450
Person / Time
Site:	Turkey Point
Issue date:	03/31/1992
From:	Plunkett T, Salamon G FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-92-89, LER-92-002-01, LER-92-2-1, NUDOCS 9204030192
Download: ML17348B450 (10)

Text

ACCELERATED DISTRIBUTION:DEMONS)TjWTION SYSTlHJl

.REGULRThhhY INFORMATION DISTRIBUTION SYSTEM (RIDE)

ACCESSICH .NBR:9204030192. DOC.'DATE: 92/03/31 NOTARIZED: NO 'OCKET. 4 FACIL:50-251 Turkey Point Plant, Unit 4, Florida Power and Light C'5000251 AUTH. NAME AUTHOR AFFILIATION SALAMON,G. Florida Power & Light Co.

PLUNKETT',T.F. Flor'ida, Power & Light Co.

.RECIP.NAME RECIPIENT, AFFILIATION h

SUBJECT:

LER 92-002-00:on 920302,emergency diesel generator 4B

,declared inoperable due to inadequate surveillance of valve 3434B on 920130;Caused by personnel error. Surveillance procedures .revised & review process examined.W/920331 ltr.

DISTRIBUTION CODE: ZE22T COPIES RECEIVED:LTR ENCL SIZE:

TITLE:. 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc,.

NOTES:NRR RAGHAVANFL .05000251-"

COPIES RECIPIENT COPIES 'ECIPIENT ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-2 LA 1 1 PD2-2 PD 1 1 AULUCK,R 1 '1 INTERNAL: ACNW 2 2 AEOD/DOA 1 1 AEOD/DSP/TPAB 1 1 AEOD/ROAB/DSP 2 2 1 1' NRR/DLPQ/LHFB10 1 1 NRR/DET/EMEB 7E '1 NRR/DLPQ/LPEB10 NRR/DREP/PRPB11 2 1

',2 1 1

NRR/DOEA/OEAB NRR/DST/SELB 8D'R 9 T SPLB8Dl

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1 1

1 1

1 NRR/DST/SZCB8H3 NRR/DST/SRXB 8E 1 EG FILE 02. 1 1 RES/DSIR/EZB 1 1 RGN2 FILE 01 1 1

'EXTERNAL 'EG & G BRYCE F J 3 3 L,ST LOBBY WARD 1 1 li

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PDR H'RC 1 1 NSIC MURPHYF'G.A 1 NSIC POOREFW. 1 1 NUDOCS FULL TXT,, 1 1 NOTES: 1 1

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PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P,l-37 (EXT. 20079) TO ELMINATEYOUR NAME FROM DISTRIBUTION.

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FULL TEXT CONVERSION REQUIRED 31'NCL

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TOTAL 'NUMBER OF COPIES REQUIRED: LTTR 31 h

P.O. Box 029100, Miami, FL, 33102-9100 L-92-89 10 CFR 50.73 U. S. Nuclear 'Regulatory Commission Attn: 'ocument Control Desk Washington, D. C;-20555 1

Gentlemen:

Re: Turkey Point Unit 4 Docket No. 50-251 Reportable Event:.92-002 Date-of Event.: .March 2, 1992 Failure to Measure Stroke Time as Part of Inservice Test The attached Licensee Event Report is submitted pursuant to the requirements of 10 CFR 50'.73 to provide information on the subject

.event..

.Very truly. yours, T. F. Plunkett Vice President Turkey Point Nuclear TFPQGS Attachment cc: Stewart D. Ebneter-, Regional Administrator,,Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant 9204030192 920331 PDR ADOCK 05000251 5 PDR an FPL'Group company

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DOCSKT NQRtR )I) tACE CS) tACILITT NAME <I)

TURKEY POINT UNIT 4 05000251 oF 3'ITLE I~ ) 'FAILURE TO MEASURE STROKE TIME AS PART OF EMERGENCY DIESEL GENERA-DAY TANK SOLENOID VALVE INSERVICE TEST DUE 'TO PERSONNEL ERROR

"'OR EVENT DATE )5) LER NUMBER IC) RtT DATE OWER FACILITIE5 INV I 5)

IT)

SEO 0 Rt HON DOCKET 0 15)

NAME 92 92 '02 00 04 Turke Point Unit. 3 50-250 OtERATI NC HDDE l0) 0 FR .7 '2 i B tamk LEVEL <10) ~ 100 L1CENSEE CONTACT FOR THIS LER (12)

G. Salamon, Licensing Engineer 305-246-6560 COHtLETF ONE LIME FOll EACH COMPONENT FAILURE DE5CRIEED IN TH15 REtORT {IS)

STSTEH NPRDS CAUSE STSTEH EXtECTED SUttLEHENTAL REPORT EXtECTED Ill) SUBMISSION DATE III Fee, ccapleee EXtECIED SUBHISSION DATE)

')15)'BSTRACT

)IC)

At 1300 on March 2, 1992, the 4B Emergency Diesel Generator (EDG) was declared inoperable due to an inadequate surveillance of valve SV-3434B,. which was installed during the Dual Unit Outage. During a review of surveillances performed to meet Inservice Test (IST) require-.

ments, it was discovered that the measurement of stroke time of valve SV-3434B was not performed within the surveillance period. The valve exercise test was performed on January 30, 1992; however, the valve's stroke time was not measured at that time. As this valve controls flow to the 4B EDG day tank, valve SV-3434B and EDG 4B were declared out of service. The valve surveillance was completed satisfactorily at 1630I, and both valve SV-3434B and the 4B EDG were returned to service at that time. The root cause of the event was personnel error, in that not all IST requirements for valve SV-3434B were incorporated into plant procedures. Surveillance procedures will be revised to ensure that al'1~

IST requirements for valve SV-3434B are incorporated. The IST program will be reviewed to assure that each test or exam for each IST compo-nent is adequately identified in the surveillance tracking system. IST are required by Technical Specifications. A missed 'urveillances Technical Specification surveillance is reportable under 10 CFR 50.73 (a) (2) (i) (B) .

LICENSEE ANT REPORT . (LER) TEXT)NTINURTION FACZLITY NAME DOCKET'UMBER LER NUMBER ~

PAGE NO.

TURKEY POINT UNIT 4 -

'05000251 92-002-00 02 oF 03 r

I. EVENT DESCRIPTION At 1300 on'arch 2, 1992, with both Units 3 and. 4 in Mode 1, the 4B Emergency Diesel Generator (EDG) (EK, EIIS:DG) was declared inoper-able due to an inadequate surveillance of valve SV-3434B.

During a review of surveillances performed to meet Inservice Test (IST) requirements, it was discovered that the measurement of stroke time of valve SV-3434B was not performed within the, surveil-lance period; The survei'llance was due.to be performed on January 30, 1992, with the grace period expiring, on February 21, '1992. The valve exercise test was performed on January 30, 1992, howeve'r, the valve's stroke time was not measured at. that time..

Upon, determining that the January 30, 1992 surveillance did not meet the requirements of .,the IST program, valve SV-3434B was declared out of service (OOS). As this valve may isolate flow to the 4B EDG day tank,. EDG. 4B was also declared OOS. The valve surveillance was completed satisfactorily at 1630, and'oth valve SV-3434B and the 4B EDG were,retu'rned to service .at that time.

IST surveillances .are required by Technical Specifications. A missed Technical Specification surveillance is reportable under

10. CFR '50.73(a) (2) (i) (B) .

II. EVENT CAUSE Valve SV-3434B was installed during the dual unit outage,(DUO)I which was'ompleted in October, 1991. During, the DUO, two new safety grade EDGs were instal'led at Turkey Point. Valve SV-3434B is a self-enclosed. solenoid valve, having neither position indica-tion. nor a control switch for actuation. Based on IST requirements of similar valves at Turkey Point, it was believed that exercise testing without a timed stroke test would meet IST requirements.

The procedural changes for performing valve'exercise,testing were completed prior to the 'end of the DUO. In December 1991, determined'hat the measurement, of stroke time was also it was necessary to meet IST requirements. Florida Power and 'Light 'Company (FPL) subsequently submitted .several relief requests on December 31, 1991. One of these relief requests described the IST testing which was to be performed on valve SV-3434B. On January 24, 1992, the NRC granted interim relief for all reliefs submitted in December, 1991.", Both the relief request and,the interim relief explicitly stated that stroke time testing was to be performed: quarterly for, valve SV-3434B.

The root cause of the event was personnel error, in. that not all IST requirements- for valve SV-3434B were incorporated into plant procedures. Contributing causes were failures to identify and track changes to the IST program which .were necessitated by the instal'lation of valve SV-3434B.

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LXCENSEE ANT REPORT (LER) "TEXT NTXNOATXON .

,FACILITY NAME 'DOCKET NUMBER LER NUMBER PAGE NO.

TURKEY POINT UNIT 4 '", 05000251 "

92-002-00, '03 oF 03 ZZZ. EVENT SAFETY ANALYSIS Valve SV-.3434B provides for isolation of the Diesel Oil Day Tank

.from the Diesel Oi'1 Transfer Pump on high. Day Tank level. The March 2, 1992, surveillance of valve SV-3434B demonstrated the va'lve's continued operability from,the time of its installation.

Based on the above, the health arid safety of the public was not affected.

CORRECTIVE ACTIONS

1. Surveillance procedures will be revised to ensure that all IST requirements for valve SV-3434B are incorporated. This action will be completed by April 15, 1992.

2'. All interim reliefs granted on January 24, 1992, will be reviewed to assure that the appropriate test requirements have been incorporated into the surveillance procedures.. This action will be completed by April 15, 1992.

p3 The IST program 'wi'll be reviewed to 'assurethat each test or-exam for each IST component is adequately identified in the surveillance tracking system.= This action wil'1 be completed by April 15, 1992.

4. Procedures will be r'evised to require tracking of all changes.

to the IST program to assure that changes are 'incorporated into plant procedures. This action will be, completed by April 30, 1992.

5. The review process for the identification of commitments within- NRC submittals will be examined to identify other. types of documents where tracking of, commitments was .not assured. ~

This action will be completed by April .30,, 1992.

V. ADDITIONAL INFORMATION A. Similar Events: None.

~, B. Additional Information: None I

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