ML17305A929

Special Rept 2-SR-90-004:on 900613,radiation Monitors RU-145 & RU-146 Inoperable for More than 72 H.Caused by Tech Spec Calibr,Installation of Temporary Mod & Detector Replacement. Monitors Returned to Svc on 900626

ML17305A929
Person / Time
Site:	Palo Verde
Issue date:	07/11/1990
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
192-00675-JML-T, 192-675-JML-T, 2-SR-90-004, 2-SR-90-4, NUDOCS 9007170127
Download: ML17305A929 (6)

Text

ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9007170127 DOC.DATE: 90/07/11 NOTARIZED: NO DOCKET FACIL:STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 AUTH. NAME 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 2-SR-90-004:on 900613,radiation monitoring unit inoperable for more than 72 h.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR TITLE: 50.73/50.9 Licensee Event Report (LER),

r ENCL 2 Incident Rpt, etc.

SIZE:+

NOTES:Standardized plant. 05000529 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 PETERSON,S. 1 1 CHAN,T 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/ECMB 9H 1 1 NRR/DET/EMEB9H3 1 1 'RR/DLPQ/LHFB11 1 1 NRR/DLPQ/LPEB10 1 1 NRR/DOEA/OEAB11 1 1 NRR/DREP/PRPB11 2 2 NRR/DST/SELB 8D 1 ~ 1 NRR/DST/SICB 7E 1 1 1 1 NRR/DST/SRXB 8E 1 1 1 1 RES/DSIR/EIB 1 1 1 1 EXTERNAL EG&G BRYCE I J ~ H 3 3 L ST LOBBY WARD 1 1 LPDR 1 1 NRC PDR 1 1 NSIC MAYS,G 1 1 NSIC MURPHY,G.A 1 1 NUDOCS FULL TXT 1 1 NOTES: 1 1 NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE 4VASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON T NEED TOTAL NUMBER OF COPIES REQUIRED: LTTR 36 ENCL 36

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Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O, BOX 52034 ~ PHOENIX. ARIZONA 85072-2034 192-00675-JML/TRB/RKR JAMES M. LEVINE VICE PRESIDENT NUCLEAR PRODUCTION July ll, 1990 U. S. Nuclear Regulatory Commission NRC Document Control Desk Washington, D.C. 20555

Dear Sirs:

Subj ect: Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 (License No. NPF-51)

Special Report 2-SR-90-004 File'0-020-404 Attached please find Special Report 2-SR-90-004 prepared and submitted pursuant to Technical Specification 3.3.3.8 ACTION 42.b and 6.9.2. This report discusses a radiation monitor inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

If you have any questions, please contact Mr. Thomas R. Bradish, Compliance Manager at (602) 393-2521.

Very truly yours, JML/TRB/RKR/dmn Attachment CC: W. F. Conway (w/attachment)

J. B. Martin D. H. Coe T. L. Chan A. C. Gehr A. H. Gutterman 9007170127 900711 FOR ADOCK 0 00052o PDC ggP I

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PALO VERDE NUCLEAR GENERATING STATION Radiation Monitoring Unit Inoperable for Greater Than 72 Hours License No. NPF-51 Docket No. STN 50-529 Special Report 2-SR-90-004 Initial Condition On June 13, 1990 at approximately 0910 MST, Palo Verde Unit 2 was in MODE 5 (COLD SHUTDOWN). Technical Specification (TS) 3.3.3.8 requires the Fuel Building Ventilation System Low and High Range Radioactive Gaseous Effluent Monitors (RU-145 and RU-146) to be OPERABLE at all times.

Descri tion of Event This Special Report is being submitted pursuant to TS 3.3.3.8 ACTION 42.b and 6.9.2 to report an event in which radiation monitor RU-146 was inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> limit for inoperability was exceeded at approximately 0910 MST on June 16, 1990.

At approximately 0910 MST on June 13, 1990, radiation monitors RU-145 and RU-146 were taken out of service to perform 18 month TS channel calibration, install temporary modification discussed in Special Report 2-SR-88-009-03, and 'he replace a detector. The results of previous surveillance testing indicated that.

the detector was operating properly', but needed to be replaced. The preplanned alternate sampling program was initiated in accordance with TS requirements.

Cause of Event The TS channel calibration, installation of the temporary modification, and detector replacement required approximately 13 days to complete and could not be completed within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

Corrective Actions Based on the cause of this event, no additional corrective actions are required.

Radiation monitors RU-145 and RU-146 were returned to an OPERABLE status at approximately 1510 MST on June 26, 1990 following satisfactory completion of surveillance testing.

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