ML17311A716
| ML17311A716 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/16/1995 |
| From: | Quay T NRC (Affiliation Not Assigned) |
| To: | Stewart W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| Shared Package | |
| ML17311A717 | List: |
| References | |
| TAC-M91500, TAC-M91501, TAC-M91502, NUDOCS 9503220224 | |
| Download: ML17311A716 (6) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, O.C. 20555-0001 March 16, 1995 Mr. Milliam L. Stewart Executive Vice President, Nuclear Arizona Public Service Company Post Office Box 53999 Phoenix, Arizona 85072-3999
SUBJECT:
AUTHORIZATION TO USE PROVISIONS OF SUBARTICLE IWA-4500 OF THE 1992 EDITION OF THE ASME CODE AND AUTHORIZATION TO USE ASME SECTION XI CODE CASE N-416-1 FOR THE PALO VERDE NUCLEAR GENERATING STATION UNIT NO.
1 (TAC NO. 891500),
UNIT NO.
2 (TAC NO. 891501),
AND UNIT NO. 3 (TAC NO. H91502)
Dear Mr. Stewart:
In a letter dated February 3, 1995, Arizona Public Service Company (APS or licensee) requested'approval to use alternatives to the 1980 Edition through the Minter of 1981 Addenda of the American Society of Mechanical Engineers (ASME)Section XI Boiler and Pressure Vessel Code.
Specifically, the licensee requested approval to use the provisions of Subarticle IWA-4500 of the 1992 Edition of the ASME Code, "Alternate Repair Welding Methods."
Based on the information provided by the licensee, the staff has concluded that, pursuant to 10 CFR 50.55a(a)(3)(ii),
use of this section of the Code is approved for repairs of steam generator feedwater nozzles.
The staff's evaluation and conclusions are contained in the enclosed safety evaluation (Enclosure 1).
The licensee's letter of February 3, 1995, also requested approval to use the ASME Code Case N-416-1 in lieu of performing the Code-required hydrostatic pressure test for welded repairs or installation of replacement items by welding.
Based on the information provided by the licensee, the staff has concluded that, pursuant to 10 CFR 50.55a(a)(3)(ii),
use of Code Case N-416-1 is authorized provided that additional surface examinations are performed on the root (pass) layer of butt and socket welds on the pressure-retaining boundary of Class 3 components when the surface examination method is used in accordance with Section III. This condition was discussed with your staff during a conference call on February 17, 1995.
Use of Code Case N-416-1 is authorized until such time as it is published in a future revision of Regulatory Guide 1.147.
At that time, if you intend to continue to implement Code Case N-416-1, you will be required to follow all provisions in it, with limitations issued in Regulatory Guide 1. 147, if any.
9503220224 9503ib PDR AoaCX 0500052S P
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Hr. William L. Stewart Mar ch 16, 1995 The staff's evaluation and conclusions are contained in the enclosed safety evaluation (Enclosure 2).
This completes our efforts on TAC Nos.
- H91500, H91501, and H91502.
Sincerely, Docket Nos.
STN 50-528, STN 50-529 and STN 50-530 Theodore R. quay, Director Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation
Enclosures:
- l. IWA-4500 Safety Evaluation
- 2. N-416-1 Safety Evaluation cc w/encls:
See next page DISTRIBUTION:
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/8/95 8 95
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Hr. William L. Stewart Arizona Public Service Company Palo Verde CC:
Hr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street Phoenix, Arizona 85007 T. E. Oubre, Esq.
Southern California Edison Company P. 0. Box 800
- Rosemead, California 91770 Senior Resident Inspector USNRC P.
O. Box 40 Buckeye, Arizona 85326 Regional Administrator, Region IV U. S. Nuclear Regulatory Commission Harris Tower 8 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064
- Chairman, Haricopa County Board of Supervisors ill South Third Avenue Phoenix, Arizona 85003 Hr. Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40 Street
- Phoenix, Arizona 85040 Hr. Curtis Hoskins Executive Vice President and Chief Operating Officer Palo Verde Services 2025 N. 3rd Street, Suite 220
- Phoenix, Arizona 85004 Roy P.
Lessey, Jr.,
Esq.
Akin, Gump, Strauss, Hauer and Feld El Paso Electric Company 1333 New Hampshire Avenue, Suite 400 Washington, DC 20036 Hs. Angela K. Krainik, Manager Nuclear Licensing Arizona Public Service Company P. 0.
Box 52034 Phoenix, Arizona 85072-2034