ML17310B404
| ML17310B404 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/20/1994 |
| From: | Stewart W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17310B405 | List: |
| References | |
| 102-03013-WLS-A, 102-3013-WLS-A, NUDOCS 9407070114 | |
| Download: ML17310B404 (8) | |
Text
(ACCELERATED RIDS PROCESSING)
REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9407070114 DOC.DATE: 94/06/20 NOTARIZED: NO DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 AUTH.NAME AUTHOR AFFILIATION STEWART,W.L.
Arizona Public Service Co.
(formerly Arizona Nuclear Power p
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards "Palo Verde 1
SG Tube Reg Guide Analysis for Primary Side Circumferential Cracking," V-PENG-TR-003,Rev l.
I DISTRIBDTION CODE:
AOOID COPIES RECEIVED:LTR (
ENCL Q SIZE: 3 W 7 TITLE: OR Submittal:
General Distribution'OTES:STANDARDIZED PLANT 05000528 R
RECIPIENT ID CODE/NAME PDIV-3 LA HOLIAN, B INTERNAL: ACRS NRR/DORS/ONDD NRR/DRPW NRR/DSSA/SPSB NUDOCS-ABSTRACT OGC/HDS2 EXTERNA NRC PDR COPIES LTTR ENCL 1
1 2
2 6
6 1
1 1
1 1
0 1
1 1
0 1
1 RECIPIENT ID CODE/NAME PDIV-3 PD TRAN,L NRR/DE/EELB NRR/DRCH/HICB NRR/DSSA/SPLB NRR/DSSA/SRXB OC WF.DCB QG LE 01 NSIC COPIES LTTR ENCL 1
1 2
2 1,
1 1
1 1
1 1
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NOTE TO ALL'RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE! CONTACTTHE DOCUMENTCONTROL DESK, ROOM P 1-37 (EXT. 504-2083 ) TO ELIMINATEYOUR NAMEFROM DISTRIBUTIONLISTS I'OR DOCUMENT JTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 25 ENCL 22
Arizona Public Service Company P.O. BOX 53999
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PHOENIX, ARIZONA85012<999 WILLIAML. STEWART EXECUTIVEVICEPAESIDENT NUCLEAA 102-03013-WLS/AKK/JRP June 20, 1994 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, D.C. 20555
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 1 Docket No. STN 50-528 Steam Generator Tube Regulatory Guide 1.121 Analysis for Primary Side Circumferential Cracking File: 94-056-026 This letter is transmitting the Unit 1 'Steam Generator Tube Regulatory Guide 1.121 Analysis for Primary Side Circumferential Cracking.
During a meeting held at the NRC offices on November 9, 1993, the NRC staff requested more quantitative data to justify a full cycle of operation.
The staff questioned the time at which defects initiate, the rates at which the defects propagate, and thus, the size of defects potentially present at the end of the next cycle of operation.
To address the staff's concerns, Arizona Public Service Company (APS) contracted with ABB-CE to perform a crack growth analysis using available field and laboratory initiation and growth data.
The primary. objective of the study was to determine the operating cycle length of Unit 1.
- ABB-CE has performed a probabilistic analysis for primary water stress corrosion cracking to demonstrate, with a high degree of confidence, the structural margins required by Regulatory Guide 1.121 willbe maintained over the next operating cycle., The analysis uses crack initiation, growth rate data, and eddy current detectability information from other CE plants.
This data is adjusted as appropriate to account for Palo Verde specific operating parameters, such as reactor coolant hot leg temperature.
The computed probabililty of 1 (or fewer) Regulatory Guide 1.121 exceedences is 98 percent for a 425-day operating period. The results support continued operation of Unit 1 for the duration of its current operating fuel cycle.
9407070114 940620 PDR ADOCK 05000528 P
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U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Steam Generator Tube Regulatory Guide 1
~121 Analysis for Primary Side Circumferential Cracking Page 2 We would be pleased to meet with you to discuss any questions which you may have.
Sincerely, WLS/AKK/JRP/did Enclosure cc:
L. J. Callan K. E. Perkins K. E. Johnston B. E. Holian
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J' ENCLOSURE UNIT 1 STEAM GENERATOR TUBE REGULATORY GUIDE ANALYSIS FOR PRIMARYSIDE CIRCUMFERENTIALCRACKING
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