ML17300B137
| ML17300B137 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/14/1987 |
| From: | Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 1-SR-87-024, 1-SR-87-24, 192-00320-JGH-T, 192-320-JGH-T, NUDOCS 8712170073 | |
| Download: ML17300B137 (6) | |
Text
ACCELERATED DJQMBUTlON DEMONSTLTION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:8712170073 DOC.DATE-87/12/14 NOTARIZED: NO DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 AUTH.NAME AUTHOR AFFILIATION HAYNES,J.G.
Arizona Nuclear Power Project (formerly Arizona Public Serv RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Special Rept 1-SR-87-024:on 871117,radiation monitoring unit inoperable for greater than 72 h.
/
DISTRIBUTION CODE:
IE22D COPIES RECEIVED: LTR /
ENCL SIZE cF TITLE: 50.73 Licensee Event Report (LER), Incident Rpt, etc.
NOTES:Standardized plant.
RECIPIENT ID CODE/NAME PD5 LA LICITRA,E INTERNAL: ACRS MICHELSON AEOD/DOA AEOD/DSP/ROAB ARM/DCTS/DAB NRR/DEST/ADS NRR/DEST/ELB NRR/DEST/MEB NRR/DEST/PSB NRR/DEST/SGB NRR/DLPQ/QAB NRR/DREP/RAB SIB REG F 02 S TELFORD,J RGN5 FILE Ol
. EXTERNAL: EG&G GROH,M H ST LOBBY WARD NRC PDR NSIC MAYS,G NOTES:
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1 RECIPIENT ID CODE/NAME PD5 PD DAVIS,M ACRS MOELLER AEOD/DSP/NAS AEOD/DSP/TPAB DEDRO NRR/DES T/CEB NRR/DEST/ICS B NRR/DES T/MTB NRR/DEST/RSB NRR/DLPQ/HFB NRR/DOEA/EAB NRR/DREP/RPB NRR/PMAS/ILRB RES DEPY GI RES/DE/EIB FORD BLDG HOY,A LPDR NSIC HARRIS,J COPIES LTTR ENCL 1
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Arizona Nuclear Power Project P.O. BOX 52034
~
PHOENIX, ARI2ONA85072-2034 192-00320-JGM/TRB/DAJ December 14, 1987 U.S.
Nuclear Regulatory Commission NRC Document Control Desk 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-87-024 File:
87-020-404 Attached please find Special Report 1-SR-87-024 prepared and submitted pursuant to Technical Specification 3.3.3.8 Action 42b and 6.9.2.
This report discusses a Radiation Honitoring unit 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 J.
E. Halik, (Acting) Compliance Lead at (602) 393-3527.
Very tr ly yours, JGM/JEH/kj Attachment 4
cc:
- 0. H. DeHichele E.
E.
Van Brunt, Jr.
J.
B. Hartin J.
R. Ball E. A. Licitra A. C.
Gehr INPO Records Center (all w/a)
J.
G.
Ma nes Vice President Nuclear Production ygz<
87i2i70073 87i2i4 PDR ADOCN 05000528 8
b l
PALO VERDE NUCLEAR GENERATING STATION Radiation Monitoring Unit Inoperable for Greater Than 72 Hours License No. NPF-41 Docket No.
STN 50-528 Special Report No.
1-SR-87-024 This Special Report is being submitted pursuant to Technical Specification 3.3.3.8 ACTION 42b and Technical Specification 6.9.2 to report an event in which a Radioactive Gaseous Effluent Monitor (Plant Vent High Range Gaseous ActivityMonitor RU-144), 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 returning to operability was exceeded at approximately 0959 HST on November 20, 1987.
Pursuant to Technical Specification 3.3.3.8 ACTION 42a the Preplanned Alternate Sampling Program was initiated to monitor the Plant Vent System.
At approximately 0959 HST on November 17,
- 1987, Palo Verde Unit 1 was in Mode 6 (REFUELING) when the Plant Vent System Radioactive Gaseous Effluent Monitors, low range RU-143 and high range RU-144, were declared inoperable for 18 month surveillance testing.
During the surveillance testing, it was discovered that an excessive slope was exhibited by the RU-144 channel one detector.
The unsatisfactory slope obtained during the surveillance testing is a normal and expected condition attributable to detector aging.
The detector was replaced and surveillance testing conducted to calibrate the detector and return the monitor to service.
RU-144 was returned to service at approximately 1738 HST on November 22, 1987.
The monitor was out of service for approximately 127 hours0.00147 days <br />0.0353 hours <br />2.099868e-4 weeks <br />4.83235e-5 months <br /> 39 minutes.
Monitors RU-143 and RU-144 work as a pair with RU-143 being the low range monitor and RU-144 being the high range monitor.
Normal configuration consists of RU-143 operating and RU-144 in standby.
When RU-143 reaches a
predetermined point, RU-144 starts and RU-143 goes to standby.
RU-144 is provided for tracking of postulated accident releases.
The unsatisfactory slope exhibited by the detector is not considered to have any'dverse impact on the health and safety of the public since there have been no accident situations at Palo Verde which required operation of RU-144.
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