ML17306B290

Special Rept 1-SR-92-005,suppl 1,provided Per Emergency Plan Implementing Procedure EPIP-03, Notification of Unusual Event Implementing Actions, Occurring on 920822 Re Loss of Power at Meteorological Tower

ML17306B290
Person / Time
Site:	Palo Verde
Issue date:	02/22/1993
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
1-SR-92-005, 1-SR-92-5, 102-02420-JML-T, 102-2420-JML-T, NUDOCS 9303010221
Download: ML17306B290 (9)

Text

ACCELER D DOCVMENT DISj!aIBVTION SYSTEM REGULA RY" INFORMATION"DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9303010221 DOC.DATE: 93/02'/22 NOTARIZED: NO DOCKET

~4 . EACIL:STN-5'0-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 II STN-50-. 529 Palo Verde Nuclear Station, Unit 2; Arizona .Publi 05000529 STN-50-530 PaloVerde Nuclear Station, Unit 3, Arizona Publi 05000530 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)

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SUBJECT:

Special rept 1-SR-92-005,suppl l,provided per emergency plan implementing procedure EPIP-03, "Notification of Unusual Event Implementing Actions,"-occurring on 920822 re

..loss of power at meteorological tower.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.

NOTES:STANDARDIZED PLANT 05000528 Standardized plant. 05000529 Standardized plant. 05000530 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 .

TRAMMELL,C 1 1 INTERNAL: ACNW 2 2 ACRS 2 2 AEOD/DOA 1 1 AEOD/DSP/TPAB 1 1 AEOD/ROAB/DSP 2 2 NRR/DE/EMEB 7E 1 1 NRR/DLPQ/LHFB10 1 1 NRR/DOEA/OEAB 1 1 NRR/DRCH/HICB8H 1 1 NRR/DRIL/RPEB10 1 1 NRR/DRSS/PRPB11 2 2 NRR/DSSA/SPLB8D 1 1 NRR DSSA/SRXB8E 1 1 NRR/DST/SELB 8D 1 1 E 02 1 1 RES/DSIR/EIB 1 1 RGN5 FILE 01 1 1 EXTERNAL 'EG&G BRYCE i J H 2 2 L ST LOBBY WARD 1 1

' ., D NRC PDR 1 1 NSIC MURPHYiG.A 1 NSIC POOREiW. 1 1 NUDOCS FULL TXT 1 1 D

NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P1-37.(EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 31 ENCL 31

Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O. BOX 52034 ~ PHOENIX. ARIZONA85072-2034 "JAMES M. LEVINE 102-02420-JML/TRB/NLT VICE PRESIDENT NUCLEAR PRODUCTION February 22; 1993 U. S. Nuclear Regulatory Commission ATTN: Document Control D'esk Mail Station P1-37 Washington, DC 20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3 Docket No. STN 50-528 (Ucense No. NPF-41)

Docket No. STN 50-529 (Ucense No. NPF-51)

Docket No. STN 50-530 (License No. NPF-79)

Special Report 1-SR-9240541 File: 93-020-404 Enclosed please find Supplement 1 to Special Report 1-SR-92-005 prepared and submitted pursuant to PVNGS Emergency Plan Implementing Procedure.(EPIP-03),

"Notification of Unusual Event Implement Action." This report discussed a condition requiring the declaration of a NOTIFICATION OF UNUSUAL EVENT due to the loss of assessment capability of all meteorological instrumentation caused by a loss of power during inclement weather.

Arizona Public Service Company (APS) has evaluated the need for declaring a NOTIFICATIONOF UNUSUAL EVENT for meteorological instrumentation outages of short duration and for outages which are discovered upon review of historical data. APS will be submitting a change to the PVNGS Emergency Plan to the NRC which will clarify the conditions whereby a NOTIFICATION OF UNUSUAL EVENT will be declared in the future.

Until the change is implemented, APS will declare a NOTIFICATIONOF UNUSUAL EVENT in accordance with EPIP-02 when a loss of assessment capability of all meteorological instrumentation is discovered by Unit Operations during the performance of daily surveillance testing or upon notification of an existing outage.

9303010221 930222 PDR ADOCK 05000528 S PDR

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.NRC Document Control Desk Special Report 1-SR-92-005-01 Page 2 I

If you have any questions, please contact Thomas R. Bradish, Manager,- Nuclear Regulatory Affairs at (602) 393-5421.

Sincerely, JML/TRB/NLT/nit Enclosure cc: W. F. Conway (all with enclosure)

J. B. Martin J. A. Sloan

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'ENCLOSURE PALO VERDE NUCLEAR GENERATING STATION UNITS 1, 2, AND 3 NOTIFICATION OP UNUSUAL EVENT DOCKET NO. 50-528, LICENSE NO. NPF-41 DOCKET NO. 50-529, LICENSE NO. NPF-51 DOCKET NO. 50-530, LICENSE NO. NPF-74

'I SPECIAL REPORT 1-SR-92-005-01

PALO VERDE NUCLEAR GENERATING STATION UNITS 1, 2, AND 3 NOTIFICATION OF UNUSUAL EVENT DOCKET NO. 50-528, LICENSE NO. NPF-41 NO. 50-529, LICENSE NO. NPF-51 'OCKET DOCKET NO. 50-530, LICENSE NO. NPF-74 SPECIAL REPORT 1-SR-92-005-01 This Special Report is provided pursuant.to PVNGS Emergency Plan Implementing Procedure (EPIP-03), "Notification of Unusual Event Implementing Actions," to report a condition requiring the declaration of an Unusual Event for Palo Verde Units 1, 2, and 3-at approximately 1700 MST on August 23, 1992. The Notification was terminated at approximately 1700 MST on August 23, 1992.

On August 22, 1992, at approximately 2245 MST, Palo Verde Units 1, 2, and 3 were in Mode 1 (POWER OPERATION) operating at approximately 100 percent power when the Unit 1 Control Room identified during the performance of 41ST-1ZZ16, "Routine Surveillance Daily Midnight Logs," that information .could not be retrieved from the Meteorological Tower. An Auxiliary Operator was dispatched to the Meteorological Tower to obtain local data and reported that power was lost to the Meteorological Tower. Loss of power was verified and Technical Specification 3.3.3.4 Action a was entered. The Meteorological Tower provides the meteorological monitoring instrumentation for wind speed, wind direction, and air temperature indication required by Technical Specification 3.3.3.4. The operability of the instrumentation ensures that meteorological data are available for estimating potential radiation doses to the public as a result of routine or accidental release of radioactive material to the atmosphere. Radiation Protection was notified of the loss of power to the Meteorological Tower. In the event of an emergency, Radiation Protection will perform dose assessments using conservative "default values" when meteorological data is unavailable, in accordance with PVNGS Emergency Plan Implementing Procedure (EPIP-14), "Dose Assessment."

Control Room personnel notified the Arizona Public Service Company (APS) Transmission

.Control Center of. the power outage. The Meteorological Tower is powered from the APS distribution system for Buckeye, Arizona. This power source was used during the construction of Palo Verde and is separate from the offsite sources used to operate the PVNGS units. The Transmission Control Center dispatched a division crew to. restore power.

On August 23, 1992, at approximately 0557 MST, the Meteorological Tower was declared operable following power restoration and satisfactory completion of Surveillance Test 41 ST-1ZZ16, and Technical Specification 3.3.3.4 Action a was exited.

.NRC Document Control Desk Special Report 1-SR-92-005-01 Page 2 I'n August 23, 1992, at approximately 1700 MST, during a review of the previous night' event, the Unit 1 Shift Supervisor determined that a NOTIFICATION OF UNUSUAL EVENT was required in accordance with PVNGS Emergency Plan Implementing Procedure (EPIP-02), "Emergency Classification," due to the loss of assessment capability of all meteorological instrumentation. In accordance with EPIP-03, the NRC was notified at approximately 1711 MST of a declaration and immediate termination of a Notification of Unusual Event. All appropriate state and local organizations were notified in accordance with EPIP-03 and an NRC Resident Inspector was notified.

Prior to EPIP-02, Revision 2, which was effective on September 24, 1984, the procedure classified the loss of assessment capability of meteorological instrumentation as an UNUSUAL EVENT. Revision 2 through Revision 7 did not classify the loss of assessment capability of all meteorological instrumentation as an UNUSUAL EVENT. However, beginning with Revision 8, effective on March 8, 1991, the loss of assessment capability

'of meteorological data is reclassified as an UNUSUAL EVENT.

APS has completed the investigation of this event which entailed a review of historical meteorological data since March 9, 1991, when EPIP-02, Revision 8; reclassified the loss of assessment capability of all meteorological instrumentation as an UNUSUAL EVENT.

Meteorological data is recorded and evaluated in accordance with Regulatory Guide 1.23 and provides the historical information contained in the Semiannual Radioactive Effluent Release Report pursuant to 10 CFR Part 50.36a(a) (2), and in accordance with Technical Specification 6.9.1.8. The review of historical data for the period March 8, 1991, through August 22, 1992, revealed that power was lost to the Meteorological Tower on' occasions. 'On August 24, 1991, during the 21 00-hour and on August 28, 1991, during the 0300-hour, there were several brief outages lasting less than a minute each.

Additional outages were identified as follows: February 6, 1991, from approximately 2038 to 2121 and from 2303 to 2329 MST; February 25, 1992, from approximately 0756 to 1103 MST; and on August 11, 1992, from approximately 2007 to 2120 MST. In each case the daily CHANNEL CHECK required by Technical Specification 4.3.3.4 was successfully completed.

APS has evaluated the need for declaring a NOTIFICATION OF UNUSUAL EVENT for meteorological instrumentation outages of short duration and for outages which are discovered upon review of historical data. APS will be submitting a change to the PVNGS Emergency Plan to the NRC which will clarify the conditions whereby a NOTIFICATION OF UNUSUAL EVENT will be declared in the future. Until the change is implemented, APS will declare a NOTIFICATION OF UNUSUAL EVENT in accordance with EPIP-02 when a loss of assessment capability of all meteorological instrumentation is discovered by Unit Operations during the performance of daily surveillance testing or upon notification of an existing outage.

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