ML17306A995

Special Rept 3-SR-92-004:seven-day Period for Returning PASS to Svc Exceeded on 920817.On 920902,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb.Possibly Caused by Maint on 920810.PASS Reworked & Operability Restored

ML17306A995
Person / Time
Site:	Palo Verde
Issue date:	09/18/1992
From:	LEVINE J M ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
192-00801-JML-T, 192-801-JML-T, 3-SR-92-004, 3-SR-92-4, NUDOCS 9209290306
Download: ML17306A995 (10)

Text

ACCELERATED TRIBUTION DEMOII'RATION SYSTEM REGULATO INFORMATION DISTRIBUTION SYSTEM (RIDS)ACCESSION NBR:9209290306 DOC.DATE: 92/09/18 NOTARIZED:

NO DOCKET FACIL:STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH.NAME AUTHOR AFFILIATION LEVINEPJ.M.

Arizona Public Service Co.(formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Special Rept 3-SR-92-004:seven-day period for returning PASS to svc exceeded on 920817.0n 920902,discovered that PASS unable to draw vacuum on gaseous sample bomb.Possibly caused by maint on 920810.PASS reworked 6 operability restored.DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR l ENCL Q.SIZE: TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.NOTES:Standardized-plant.05000530 RECIPIENT ID CODE/NAME PD5 LA TRAMMELLiC INTERNAL: ACNW AEOD/DOA AEOD/ROAB/DSP NRR/DLPQ/LHFB10 NRR/DOEA/OEAB NRR/DST/SELB 8D NRH/D LB8Dl REG FILE 02 G LE 01 EXTERNAL'G&G BRYCEPJ AH NRC PDR NSIC POOREPW~COPIES LTTR ENCL 1 1 1 1 2 2 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 RECIPIENT ID CODE/NAME PD5 PD ACRS AEOD/DSP/TPAB NRR/DET/EMEB 7E NRR/DLPQ/LPEB10 NRR/DREP/PRPBll NRR/DST/SICB8H3 NRR/DST/SRXB 8E RES/DSIR/EIB L ST LOBBY WARD NS IC MURPHY i G.A NUDOCS FULL TXT COPIES LTTR ENCL 1 1 2 2 l.1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE!CONTACT THE DOCUMENT CONTROL DESK.ROOM Pi-37 (EXT.504-2065)TO ELIMINATE YOUR NAME FROM DiSTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!TOTAL NUMBER OF COPIES REQUIRED: LTTR'1 ENCL 31

%T)I Jl jli JAMES M.LEVINE VICE PRESIDENT NUCLEAR PRODUCTION Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O.BOX 52034~PHOENIX.ARIZONA 85072-2034 192-00801-JML/TRB/JJN September 18, 1992 CORRECTED COPY U.S.Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)Unit 3 Docket No.STN 50-530 (License No.NPF-74)Special Report 3-SR-92-004 File: 92-020-404 Enclosed please find Special Report 3-SR-92-004 prepared and submitted pursuant to, Technical Specifications 3.3.3.1 ACTION 28 and 6.9.2.This report is being resubmitted to correct the report number since 3-SR-92-003 had been previously used.This report discusses the Post Accident Sampling System being inoperable for greater than'even days.A copy of the Special Report is being forwarded to the Regional Administrator, NRC Region V.If you have any questions, please contact Thomas R.Bradish at (602)393-5421.Sincerely, JML/TRB/J JN/pmm Enclosure cc: W.F.Conway J.B.Martin J.A.Sloan (all w/enclosure)

C 9209290306 9209i8 PDR ADOCK 05000530 8 PDR (I,

ENCLOSURE POST ACCIDENT SAMPLING SYSTEM INOPERABLE GREATER THAN SEVEN DAYS

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PALO VERDE NUCLEAR GENERATING STATION UNIT 1 POST ACCIDENT SAMPLING SYSTEM INOPERABLE GREATER THAN SEVEN DAYS LICENSE NO.NPF-74 DOCKET NO.50-530 SPECIAL REPORT 3-SR-92-004 INITIAL CONDITIONS:

This Special Report is being submitted pursuant to Technical Specification (TS)3.3.3.1 ACTION 28 and TS 6.9.2 to report an event in which the Post Accident Sampling System (PASS)was inoperable for a period greater than seven days.The seven-day period for returning PASS to service was exceeded at approximately 1005 MST on August 17, 1992.BACKGROUND INFORMATION'ASS is designed to sample reactor coolant and containment atmosphere under post'ccident conditions.

The liquid sample portion of the system provides pressurized and depressurized reactor coolant samples as required for analysis.The gas sample portion of the system provides containment atmosphere samples as required for analysis.ACTIONS TAKEN: On August 10, 1992, Palo Verde Unit 3 was in Mode 1 (power operation) when PASS was declared inoperable at approximately 1000 MST for maintenance.

Following the completion of work at approximately 1503 MST on August 10, 1992, PASS was declared operable.On September 2, 1992, Chemistry Technicians discovered that the PASS was unable to draw a vacuum on the gaseous sample bomb.Initial t'roubleshooting determined on September 4, 1992, that the maintenance performed on August 10, 1992, may have caused the PASS to b'e inoperable.

The PASS was reworked and operability was restored on September 5, 1992.1 of 2

CAUSE OF THE INOPERABILITY:

APS is currently investigating this event and will provide the results of this investigation in a supplement to this report.This supplement is expected to be submitted by November 1, 1992.-PLANS AND SCHEDULE FOR RESTORING THE SYSTEM TO SERVICE: Following satisfactory completion of repairs and required surveillance testing, PASS was returned to OPERABLE status at approximately 2137 on, September 5, 1992.2of2