ML17306A965

Special Rept 3-SR-92-003:on 920903,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb & Declared Inoperable for More than 7 Days.Cause Under Investigation. Sys Returned to Operable Status on 920905

ML17306A965
Person / Time
Site:	Palo Verde
Issue date:	09/16/1992
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
192-00800-JML-T, 192-800-JML-T, 3-SR-92-003, 3-SR-92-3, NUDOCS 9209220384
Download: ML17306A965 (10)

Text

ACCELERATED DI'RIBUTION DEMONATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9209220384 DOC.DATE: 92/09/16 NOTARIZED: NO DOCKET FACIL:STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH.MME AUTHOR AFFILIATION LEVINE,J.M. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Special Rept 3-SR-92-003:on 920903,discovered that PASS unable to draw vacuum on gaseous sample bomb & declared inoperable for more than 7 days. Cause under investigation.

Sys returned to operable status on 920905.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

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

S NOTES:Standardized plant. 05000530

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RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PDS LA 1 1 PD5 PD 1 1 TRAMMELLiC 1 1 INTERNAL: ACNW 2 2 ACRS 2 2 AEOD/DOA 1 1 AEOD/DSP/TPAB 1 1 AEOD/ROAB/DSP 2 2 NRR/DET/EMEB 7E 1 1 NRR/DLPQ/LHFB10 1 1 NRR/DLPQ/LPEB10 1 1 NRR/DOEA/OEAB 1 1 NRR/DREP/PRPBll 1 2 2 NRR/DST/SELB SD 1 1 NRR/DST/SICBSH3 1 1 NR SPLBSD1 1 1 NRR/DST/SRXB SE 1 1 REG FI 02 1 1 RES/DSIR/EIB 1 1 GN ILE Ol 1 1 EXTERNAL: EG&G BRYCEgJ.H 2 2 L ST LOBBY WARD 1 1 NRC PDR 1 1 NSIC MURPHY,G.A 1 1 NSIC POOREiW. 1 1 NUDOCS FULL TXT 1 1 NOTE TO ALL "RIDS RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK.

ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 31 ENCL 31

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Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O. BOX S2034 ~ PHOENIX, ARIZONA85072-2034 JAMES M. LEVINE 192-00800-JNL/TRB/JJN VICE PRESI DENT NUCLEAR PRODUCTION September 16, 1992 U. S. Nuclear Regulatory Commission ATIN: 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-92-003 File: 92-020-404 Enclosed please find Special Report 3-SR-92-003 prepared and submitted pursuant to Technical Specifications 3.3.3.1 ACTION 28 and 6.9.2. This report dis'cusses the Post Accident Sampling System being inoperable for greater than seven 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/JJN/pmm Enclosure cc: W. F. Conway (all w/enclosure)

J. B. Martin D. H. Coe ni ~ -

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l ENCLOSURE POST ACCIDENT SAMPLING SYSTEM INOPERABLE GREATER THAN SEVEN DAYS

I 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-92-003 INITIALCONDITIONS:

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 accident 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 troubleshooting determined on September 4, 1992, that the maintenance performed on August 10, 1992, may have caused the PASS to be inoperable. The PASS was reworked and operability was restored on September 5, 1992.

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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.

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