ML17306B352
| ML17306B352 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/15/1993 |
| From: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17306B353 | List: |
| References | |
| 102-02453-WFC-T, 102-2453-WFC-T, NUDOCS 9303230113 | |
| Download: ML17306B352 (12) | |
Text
ACCEI ERAT DOCUMENT DIST UTION SYSTEM REGULATO INFORMATION DISTRIBUTION
'TEM (RIDS)
ACCESSION NBR:9303230113 DOC.DATE: 93/03/15 NOTARIZED:
NO DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Pa'lo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH.NAME AUTHOR AFFILIATION CONWAY,W.F.
Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards "Proposed Revision to Emergency Plan Table 5.1-1 Example Emergency Action Levels Degraded Facility Control, Indication or Alarm."
DISTRIBUTION CODE:
0045D COPIES RECEIVED:LTR I
ENCL J SIZE:
TITLE: OR Submittal:
- Plans, Implement'g Procedures, C
/
NOTES:STANDARDIZED PLANT Standardized plant.
,Standardized plant.
05000528 A
05000529 05000530 D
RECIPIENT ID CODE/NAME PD5 PD TRAN,L INTERNAL: AEOD/DOA/IRB NUDOCS-ABSTRACT EXTERNAL: NRC PDR COPIES LTTR ENCL 1
1 1
1 1
1 1
1 1
RECIPIENT ID CODE/NAME TRAMMELLgC J3RSS/PEPB REG FIL 01 NSIC COPIES LTTR ENCL 1
1 1
1 1
1 1,1 D
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NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTEl CONTACI'HE DOCUMENT CONTROL DESK, ROOM PI-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
D TOTAL NUMBER OF COPIES REQUIRED:
LTTR 9
ENCL 9
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Arizona Public Service Company P.O. BOX 53999
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PHOENIX. ARIZONA85072-3999 WILLIAMF. CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR 102-02453-WFC/TRB/J JN March 15, 1993 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Mail Station P1-37 Washington, DC 20555
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2, and 3 Docket Nos. STN 50-528/529/530 Proposed Revision to the Emergency Plan File: 93-002-493 93-056-026 Arizona Public Service Company (APS) proposes a revision to the Emergency Plan in accordance with 10 CFR 50.54 (q) and 50.4.
This revision would permit the Meteorological Tower to be out of service for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to declaring a Notification of Unusual Event.
APS has determined that this revision of the Emergency Plan will continue to provide reasonable assurance that the health and safety of the public will be adequately protected.
APS requests that the NRC review and approve this revision prior to implementation in accordance with 10 CFR 50.54 (q). APS has discussed the proposed revision with the Region V, Branch Chief of Safeguards and Emergency Preparedness, and the appropriate state and county officials.
Formal correspondence documenting the state and county concurrence is forthcoming. The description and justification ofthe proposed revision are provided in Enclosure 1 to this letter: The proposed revision is provided as.
03230ii3 9303i5 ADaCe OS0005aS PDR PDR F
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U. S. Nuclear Requlatory Commission ATTN: Document Control Desk Proposed Revision to the Emergency Plan Page 2 If you should have any questions, please call Thomas R. Bradish at (602) 393-5421.
Sincerely, WFC/TRB/JJN/rv Enclosure 1
Description and Justification of the Proposed Revision to the Emergency Plan Proposed Revision to the Emergency Plan cc:
J. B. Martin (two copies)
J. A. Sloan
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ENCLOSURE 1 DESCRIPTION AND JUSTIFICATION OF THE PROPOSED REVISION TO THE EMERGENCY PLAN
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DESCRIPTION AND JUSTIFICATION OF THE PROPOSED REVISION TO THE EMERGENCY PLAN Descri tion of the Pro osed Revision Arizona Public Service (APS) is proposing a revision to the Emergency Action Level (EAL) criteria. Currently, the loss of all meteorological instrumentation requires the declaration of a Notification of Unusual Event (NUE) regardless of length of time of the loss.
The proposed Emergency Plan revision willchange Table 5.1-1, "Example Emergency Action Levels (EALs): Degraded facility control, indication or alarm," which sets forth the emergency classification criteria for various events.
The proposed revision will change Table 5.1-1 to require that a NUE be declared ifthe loss of meteorological instrumentation exceeds 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> beyond discovery.
Justification of the Pro osed Revision The meteorological instrumentation is required by Technical Specification (TS) 3.3.3.4 to be operable at all times, and this operability is demonstrated by performance of a daily channel check.
This channel check is accomplished as part of the surveillance activities performed in accordance with PVNGS Procedure 41 ST-1 ZZ1 6, "Routine Surveillance Daily Midnight Logs." The surveillance requirements of TS 4.3.3.4, and ongoing data collection and analysis, provide assurance that the meteorological instrumentation is operable and reliable.
The action requirements of TS 3.3.3.4 provide that with one or more channels inoperable for more than seven days, a special report shall be submitted outlining the causes of the malfunction and plans for restoration.
The 24-hour time period proposed by the revision is well within the seven day action statement of TS 3.3.3.4 and will eliminate the requirement for declaring a NUE when corrective actions/repairs or routine maintenance activities are able to restore the meteorological instrumentation to an operable condition, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
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Should the meteorological instrumentation be out of service at any time when a dose projection is required, conservative default values for wind speed, wind direction, and stability class, per EPIP-54, "Dose Assessment",
would be used.
This use of default meteorological data will result in conservative (higher) estimated doses relative to projections resulting from the use of actual meteorological data.
Based on these default values, which are also provided to State of Arizona decision-makers, the Protective Action Recommendations (PARs) will also be conservative and will be applicable for a full 360 degree radius independent of actual wind direction.
References to the use of these values in determining PARs are being incorporated into EPIP-15, "Protective Action Guidelines."
The use of these default values provides reasonable assurance the public health and safety willbe protected in the event of an emergency while the meteorological instrumentation is not in service.
The proposed revision to existing EALclassification criteria willnot significantly affect the health and safety of the public. An evaluation was performed to determine the availability of the Meteorological Tower.
From a review of past
- data, the frequency of the Meteorological Tower being out of service is 6.7 times per year.
The average out of service time is 1.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />.
Based on these values, the expected availability of the meteorological tower is approximately 99.8 percent.
This provides a high degree of confidence that the meteorological data will be available.
In the event that the Meteorological Tower is temporarily out of service, the marginal benefit of earlier notification, prior to an unlikely event which would require it's use does not justify activation of county, state, and federal agencies for a condition of no safety significance (i.e., adequate compensatory measures are in place to use conservative default values when meteorological instrumentation is unavailable).
Thus, the proposed change will reduce an unnecessary burden on county, state, federal, and APS resources.
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