ML17300B274
| ML17300B274 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/27/1996 |
| From: | Clifford J NRC (Affiliation Not Assigned) |
| To: | Stewart W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| GL-95-07, GL-95-7, TAC-M93497, TAC-M93498, TAC-M93499, NUDOCS 9607010290 | |
| Download: ML17300B274 (6) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 27, 1996 Hr. William L. Stewart Executive Vice President, Nuclear Arizona Public Service Company Post Office Box 53999
- Phoenix, Arizona 85072-3999 l
SUBJECT:
REQUEST FOR ADDITIONAL INFORHATION GENERIC LETTER 95-07, "PRESSURE LOCKING AND THERHAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES," FOR THE PALO VERDE NUCLEAR GENERATING STATION (TAC NOS.
- H93497, H93498, AND H93499)
Dear Hr. Stewart:
On August 17, 1995, the NRC issued Generic Letter (GL) 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves," to request that licensees take actions to ensure that safety-related power-operated gate valves that are susceptible to pressure locking or thermal binding are capable of performing their safety functions.
We are reviewing and evaluating your response to GL 95-07.
Additional information is requested in order for the staff to complete its review.
Through review of operational experience
- feedback, the staff is aware of instances where licensees have completed design or procedural modifications to preclude pressure locking or thermal binding which may have had an adverse impact on plant safety due to incomplete or incorrect evaluation of the potential effects of these modifications.
Please describe evaluations and training for plant personnel that you performed for each design or procedural modification made to address potential pressure locking or thermal binding concerns.
The information requested by this letter is within the scope of the overall burden estimated in Generic Letter 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves," which was a maximum of 75 hours8.680556e-4 days <br />0.0208 hours <br />1.240079e-4 weeks <br />2.85375e-5 months <br /> per response.
This request is covered by Office of Hanagement and Budget Clearance Number 3150-0011, which expires July 31, 1997.
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Hr. William L. Stewart June 27, 1996 We request that you respond within 30 days of receipt of this letter.
Please contact me at 301-415-1352 if you have any questions related to this request.
Sincerely, Original Signed By James W. Clifford, Senior Project Manager
'roject Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos.
STN 50-528, STN 50-529 and STN 50-530 cc:
See next page DISTRIBUTION:
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PUBLIC JRoe WBateman JClifford EPeyton REaton HRathbun ACRS PDIV-2 Reading
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Mr. William L. Stewart June 27, 1996 CC:
Mr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street
- Phoenix, Arizona 85007 Douglas Kent Porter Senior Counsel Southern California Edison Company Law Department, Generation Resources P.O.
Box 800
- Rosemead, California 91770 Senior Resident Inspector USNRC P. 0.
Box 40
- Buckeye, Arizona 85326 Regional Administrator, Region IV U.
S. Nuclear Regulatory Commission Harris Tower E Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064
- Chairman, Board of Supervisors ATTN:
Chairman 301 W. Jefferson, 10th Floor
- Phoenix, Arizona 85003 Hr. Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40 Street
- Phoenix, Arizona 85040 Hs. Angela K. Krainik, Manager Nuclear Licensing Arizona Public Service Company P.O.
Box 52034
- Phoenix, Arizona 85072-2034 Hr. John C. Horne, Vice President Power Supply Palo Verde Services 2025 N. Third Street, Suite 220
- Phoenix, Arizona 85004
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