ML17305B334

Corrected Copy of Special Rept 1-SR-90-007.On 901221, Containment Bldg Radiation Monitor RU-1 Inoperable for More than 72 H.On 901218,monitor Declared Inoperable Due to High Flow Conditions.Caused by Failure of Flow Totalizer

ML17305B334
Person / Time
Site:	Palo Verde
Issue date:	01/16/1991
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
1-SR-90-007, 1-SR-90-7, 192-00710-JML-T, 192-710-JML-T, NUDOCS 9101290040
Download: ML17305B334 (5)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9101290040 DOC.DATE: 91/01/16 NOTARIZED: NO DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit. 1, Arizona Publi 05000528 AUTH. NAME AUTHOR AFFILIATION LEVINE,J.M. Arizona Public Service Co. (formerl'y.. Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Corrected copy of Special Rept 1-SR-90-007.0n 901221, containment bldg radiation monitor RU-1 inoperable for more than .72 h.On 901218,monitor declared inoperable due to high D flow conditions. Caused by failure of flow totalizer.

l IncidentQRpt, etc.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: 50.73/50.9 Licensee Event Report (LER), /

NOTES:STANDARDIZED PLANT 05000528 A RECIPIENT COPIES RECIPIENT COPIES D ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 D TRAMMELL,C 1 1 TRAMMELL,C. 1 1 INTERNAL: ACNW 2 2 ACRS 2 2 AEOD/DOA 1 1 AEOD/DS P/TPAB 1. 1 AEOD/ROAB/DSP 2 2 NRR/DET/ECMB 9H 1' NRR/DET/EMEB 7E 1 1 NRR/DLPQ/LHFBl1 1 1 NRR/DLPQ/LPEB10 1 1 NRR/DOEA/OEAB 1 1 NRR/DREP/PRPBll 2 2 NRR/DST/SELB 8D 1 1 NRR/DST/SICB 7E 1 1 NRR ST/&~LB8D1 1 1 NRR/DST/SRXB 8E 1 1 RE ILE 1 1 RES/DSIR/EIB 1 1 RGN5 01 1 1 EXTERNAL EG &G BRYCE P J ~ H 3 3 L ST LOBBY WARD 1 1 NRC PDR 1 1 NSIC MAYS,G 1 1 NSIC MURPHY,G.A 1 1 NUDOCS FULL TXT 1 1 R NOTES 1 1 D

D D

NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE iVASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELlb IINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

n TOTAL NUMBER OF COPIES REQUIRED: LTTR 35 ENCL 35

1

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Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P 0, BOX 52034 ~ PHOENIX. ARIZONA 85072-2034 JAMES M. LEVINE 192-00710- JHL/TRB/SBJ VICE PRESIOENT January 16, 1991

.'IUCLEAR PRODUCTION (CORRECTED COPY)

U. S. Nuclear Regulatory Commission Attention: NRC Document Control Desk Mail Station: Pl-37 Washington, D.C. 20555

Dear Sirs:

Subj ect: Palo Verde Nuclear Generating Station (PVNGS)

Unit 1 Docket No. STN 50-528 (License No. NPF-41)

Special Report 1-SR-90-007 File: 91-020-404 Attached please find Special Report 1-SR-90-007 prepared and submitted pursuant to Technical Specifications 3.3.3.1 ACTION 27 and 6.9.2. This repor" discusses the Containment Building Atmosphere Radiation Monitor being inoperable ror a period 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 T. R. Bradish, Compliance Manager, at (602) 393-2521.

Very truly yours, JHL/TRB/SB J/dmn Attachment CC W. F. Conway (all w/attachment)

J. B. Martin D. H. Coe A. C. Gehr A. H. Gutterman INPO Records Center 910i.25'004LI 910iib r r R WDOCK 0.-000=2::-

8 PDF'

0 PALO VERDE NUCLEAR GENERATING STATION UNIT 1 Radiation Monitor Inoperable License No: NPF-41 Docket No. 50-528 Special Report 1-SR-90-007 Initial Conditions On December 21, 1990 Palo Verde Unit 1 was in Mode 1 (POWER OPERATION) at approximately 100 percent power.

Descri tion of Event:

This Special Report is being submitted pursuant to Technical Specification 3.3.3.1 ACTION 27 and Technical Specification 6.9.2 to report an event in which the Containment Building Atmosphere Radiation Monitor (RU-1) was inoperable for a period 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 /> period for returning the monitor to service was exceeded at approximately 0830 MST on December 21, 1990.

On December 18, 1990 at approximately 0830 MST, the Containment Building Atmosphere Radiation Monitor (RU-1) was declared inoperable because of high flow conditions. RU-1 continuously monitors the containment atmosphere for particulate and gaseous activity to provide a qualitat've indication of an increase in primary coolant system leakage. A portable radiation monitor was installed to continuously sample containmen" air and grab sampling initiated in accordance with Technical Specifications 3.3.3.1 Action 27.

Cause of Event:

The cause of RU-1 being inoperable was a failure or, the flow totalizer.

The radiation monitor could not be returned to service within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> due to the time required to obtain replacement parts.

Based on current information, the failure is considered to be an isolated equipment failure. If additional information is developed f om the evaluation of the failed flow totalizer, a supplement to the report will be submitted.

Corrective Actions:

The flow totalizer was replaced and the surveillance test was successfully performed. The radiation monitor was declared operable at approximately 1543 MST on December 28, 1990. RU-1 was inoperable for approximately 10 days, 7 hours and 13 minutes.