ML17305B330
| ML17305B330 | |
| 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 9101230321 | |
| Download: ML17305B330 (5) | |
Text
ACCEL'ERATED DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
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05000528 ACCESSION NBR:9101230321 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.
(formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Special Rept 1-SR-90-007:on 901221.containment bldg atmosphere 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.
DISTRIBUTION CODE:
IE22D COPIES RECEIVED:LTR ENCL SIZE:
TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.
NOTES:STANDARDIZED PLANT RECIPIENT ID CODE/NAME PD5 LA TRAMMELL,C INTERNAL: ACNW AEOD/DOA AEOD/ROAB/DSP NRR/DET/EMEB 7E NRR/DLPQ/LPEB10 NRR/DREP/PRPBll NRR/DST/SICB'7E NRR/DST/SRXB 8E RES/DSIR/EIB EXTERNAL: EG&G BRYCE,J.H NRC PDR NSIC MURPHY1G ~ A NOTES:
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1 RECIPIENT ID CODE/NAME PD5 PD TRAMMELL,C.
ACRS AEOD/DSP/TPAB NRR/DET/ECMB 9H NRR/DLPQ/LHFBl1 NRR/DOEA/OEAB NRR/DST/SELB 8D NRR DS~S~B 1
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L ST LOBBY WARD NSIC MAYS,G NUDOCS FULL TXT
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NOTE TO Al L "RIDS'ECIPIENTS:
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PLEASE I.IELP US TO REDUCE 6"ASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOb'I Pl-37 (EXT. 200l9) TO ELlib'IINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUiIENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED'TTR 35 ENCL 35
Arizona Pub1ic Service Compan)
PALO VERDE NUCLEAR GENERATING STATION P,O BOX 52034
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PHOENIX. ARIZONA85072-2034 JAMES M. LEVINE VICEPRESmENT NUCLEAR PRODUCTIO'4 192-00710-JML/TRB/SBJ January 16, 1991 U,
S. Nuclear Regulatory Commission Attention:
NRC Document Control Desk Mail Station:
Pl-37 Washington, D.C.
20555
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 1 Docket No,.
STN 50-528 (License No. NPF-41)
Special Report 1-SR-90-007 File'1'-020-404 Attached please find Special Report 1.-SR-90-006 prepared and submitted pursuant to Technical Specifications 3.3.3.1 ACTION 27 and 6.9.2.
This report discusses the Containment Building Atmosphere Radiation Monitor being 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 />.
1 If you have any questions, please contact T. R. Bradish, Compliance
- Manager, at (602) 393-2521.
Very truly yours, JML/TRB/SBJ/dmn Attachment (all w/attachment) cc:
WE F.
Conway J.
B, Martin D. H.
Coe A.
C.
Gehr A. H. Gutterman INPO Records Center 9101230321 PlIfi AOOCK ObpOO-
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F'DR 2
I
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II Pyp~~
PALO VERDE NUCLEAR GENERATING STATION UNIT 1 Radiation Monitor Inoperable t
License No. NPF-41 Docket No. 50-528 Special Report 1-SR-90-007 Initial Conditions'n December 21, 1990 Palo Verde Unit 1 was in Mode 1
(POWER OPERATION) at approximately 100 percent power.
,Descri tion of Event'his 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 qualitative indication of an increase in primary coolant system leakage.
A portable
-radiation monitor was installed to continuously sample containment 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 of 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 from the evaluation of the failed flow totalizer, a'supplement to the report will be submitted.
Corrective Actions'he 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 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> and 13 minutes.
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