ML17312B206
| ML17312B206 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 01/19/1997 |
| From: | James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 102-03849-JML-A, 102-3849-JML-A, NUDOCS 9702040096 | |
| Download: ML17312B206 (6) | |
Text
CATEGORY 1 REGULAR INFORMATION DISTRIBUTION.'STEM (RIDE)
- i ACCESS~ON NBR:9702040096 DOC.DATE: 97/01/19 NOTARIZED: NO DOCKET 4
FACIL F~TN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 AUTH.NAME AUTHOR AFFILIATION LFVINE,J.M.
Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFEILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards Cycle 7 steam generator evaluation rept'hich discusses latest Eddy Current Testing Exam results along w/methodologies used to determine appropriate cycle length.
DISTRIBUTION CODE:
AOOID COPIES RECEIVED:LTR
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ENCL Q SIZE:
2 TITLE: OR Submittal: General Distribution NOTES:Standardized plant.
05000529 E
RECIPIENT ID CODE/NAME
'PD4-2 LA CLIFFORDFJ COPIES LTTR ENCI RECIPIENT ID CODE/NAME PD4-2 PD COPIES LTTR ENCL INTERNAL: ACRS NRR/DE/ECGB/A NRR/DRCH/HICB NRR/DSSA/SRXB OGC/HDS2 EXTERNAL: NOAC LE CEN 01 NRC PDR NRR/DSSA/SPLB NUDOCS-ABSTRACT D
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PLEASE HELP US TO REDUCE WASTE!
CONTACT THE DOCUMENT CONTROL DESK, ROOM OWFN SD-5(EXT. 415-2083)
TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
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0 Palo Verde Nuclear Generating Station James M. Levine Senior Vice President Nuclear TEL (602)393-5300 FAX (602)3934077 Mail Station 7602 P.O. Box 52034 Phoenix, AZ 85072-2034 102-03849-JMLJAKK/JRP January 19, 1997 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 2 Docket No. STN 50-529 Cycle 7 Steam Generator Evaluation Report This letter transmits the Arizona Public Service Company (APS) Steam Generator Evaluation Report for Palo Verde Nuclear Generating Station (PVNGS) Unit 2.
The enclosed report discusses the latest Eddy Current Testing (ECT) Examination results along with methodologies used to determine the appropriate cycle length.
In addition to the analyses and methodologies described in this report, APS has taken actions to provide defense - in - de'pth in order to prevent a challenge to nuclear safety.
These actions include: preventive measures such as chemistry improvements, primary temperature reduction, N -16 monitoring improvements, comprehensive steam generator inspections, and conservative plugging criteria.
An improved,, leak rate monitoring program and administrative limits on primary - to - secondary leakage provide additional confidence that an orderly shutdown would be able to be conducted prior to a tube rupture occurring.
APS has reviewed the consequences, of previously analyzed, accidents with respect to operation with existing steam generator tubing conditions.
To further minimize the consequences of currently analyzed accidents, APS has taken measures to provide operations personnel with diagnostic tools and training.
These measures include: event specific training of operations personnel with tube rupture events, improvements in leakage diagnostics'ia equipment upgrades, and protocol upgrades to the Emergency Operating Procedures.
These actions permit faster identification and isolation of the affected steam generator should a steam generator tube rupture (STGR) event occur.
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U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Steam Generator Evaluation Report Page 2 The analyses described in the enclosed report lead to the conclusion that PVNGS Unit 2 may operate at least 16.5 months until the next scheduled refueling outage with no significant risk to the health and safety of the public.
APS has requested a meeting with the staff in February 1997 to discuss the results of this steam generator evaluation and the basis for the aforementioned conclusion.
Should you have any questions, please contact Scott A. Bauer at (602) 393-5978.
Sincerely, JML/AKK/JRP/rh Enclosure cc:
L. J. Callan K. E. Perkins J. W. Clifford K. E. Johnston I. Barnes
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