ML17305A716
| ML17305A716 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/21/1990 |
| From: | James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 1-SR-90-002, 1-SR-90-2, 192-00650-JML-T, 192-650-JML-T, NUDOCS 9004300242 | |
| Download: ML17305A716 (6) | |
Text
e REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9004300242 DOC.DATE: 90/04/21 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-90-002:on 900327,radiation monitoring unit inoperable greater than 72 h.
DISTRXBUTION CODE:
IE22D COPIES RECEIVED:LTR ENCL SIZE:
TITLE: 50.73/50.9 Licensee Event Report (LER),
ncident Rpt, etc.
NOTES:
'05000528 RECIPIENT ID CODE/NAME PD5 LA PETERSON,S.
INTERNAL: ACNW AEOD/DOA AEOD/ROAB/DSP NRR/DET/ECMB 9H NRR/DET/ESGB 8D NRR/DLPQ/LPEB10 NRR/DREP/PRPB11 NRR/DST/SICB 7E NRR/DST/SRXB 8E RES/DSIR/EXB EXTERNAL EG&G STUART g V ~ A LPDR NSIC MAYS,G NUDOCS FULL TXT NOTES COPIES LTTR ENCL 1
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RECIPXENT ID CODE/NAME PD5 PD CHAN,T ACRS AEOD/DSP/TPAB DEDRO NRR/DET/EMEB9H3 NRR/DLPQ/LHFB11 NRR/DOEA/OEAB11 NRR/DST/SELB 8D HRR/DST/SBLBQD1
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1 NOTE TO ALL"RIDS" RECIPIEKIS:
PLEASE HELP US TO REDUCE WAIKIKICONTACT THE,DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELMINATEYOUR NAMEFROM DISIRIBUTION LISIS FOR DOCUMENTS YOU DON'T NEEDl TOTAL NUMBER OF COPIES REQUIRED:
LTTR 39 ENCL 39
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Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O. BOX 52034
~
PHOENIX, ARIZONA85072-2034 JAMES M. LEVINE VICE PRESIDENT NUCLEAR PRODUCTION
- 192-00650-JML/TRB/SBJ April 21, 1990 U.
S. Nuclear Regulatory Commission NRC Document Control Desk Washington, D.C.
20555
Dear Sirs:
Sub) ect:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 1 Docket No.
STN 50-528 (License No. NPF-41)
Special Report 1-SR-90-002 File'0-020-404 Attached please find Special Report 1-SR-90-002 prepared and submitted pursuant to Technical Specifications 3.3.3.8 ACTION 42(b) and 6.9.2.
This report discusses a radiation monitor inoperable for greater than 72 "hours.
If you have any questions, please contact T. R. Bradish, Compliance
- Manager, at (602) 393-2521.
Very truly yours, JML/TRB/SBJ/tlg Attachment (all w/attachment) cc:
W. F.
Conway J
~
B. Martin T. L. Chan D. H.
Coe A. C. Gehr A.
Gutterman INPO Records Center
F j
I
PALO VERDE NUCLEAR GENERATING STATION UNIT 1 Radiation Monitoring Unit Inoperable Greater Than 72 Hours License No. NPF-41 Docket No. 50-528 Special Report 1-SR-90-002 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 the Condenser Evacuation System High Range Radiation Monitor (RU-142) was inoperable 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 the monitor to service was exceeded at approximately 0104 MST on March 27,1990.
The Preplanned Alternate Sampling Program (PASP) was initiated in accordance with Technical Specification 3.3.3.8 ACTIONS 36,37,40, and 42a.
At the time of this event, Palo Verde Unit 1 was in a refueling outage with the reactor in Mode 5 (cold shutdown).
The Condenser Evacuation System Radiation Monitors (RU-141 and RU-142) were inoperable in order to implement modifications required to improve the performance of the monitors.
These radiation monitors work as a pair with the Low Range Radiation Monitor (RU-141) operating and the High Range Radiation Monitor (RU-142) in standby.
When the low range monitor reaches a predetermined
- setpoint, the high range monitor 'starts and the low range monitor goes to standby.
The high range monitor is provided for tracking effluents during postulated accidents.
Prior to the event, the Unit 1 Auxiliary Steam Supply was being supplied by the auxiliary boiler.
On March 21,1990, at approximately 2223 MST the auxiliary steam supply to Unit 1 was transferred from the auxiliary boiler to the Unit 3 Auxiliary Steam Supply system.
On March 24,1990, at approximately 0104 MST auxiliary steam was supplied to the Turbine Gland Seal System in preparation for establishing condenser vacuum.
Technical Specification 3.3.3.8 requires that the Condenser Evacuation System High Range (RU-142) and Low Range (RU-141) Radiation Monitors be operable whenever turbine glands are being supplied with steam from sources other than the auxiliary boilers.
Since RU-141 and RU-142 were inoperable, the PASP was initiated in accordance with Technical Specification 3.3.3.8 ACTIONS 36, 37, 40, and 42a.
In addition, the Unit 3 Condenser Evacuation System Radiation Monitors were operable providing on-line indication of abnormal radiation levels in the Unit 3 condenser effluent.
On April 10,1990 at approximately 1606 MST, RU-141 and RU-142 were declared operable following completion of modifications and required surveillance testing.
RU-141 and RU-142 were not available for service for approximately 17 days and 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br />.
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