ML20125C835
| ML20125C835 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 12/09/1992 |
| From: | De Agazio A Office of Nuclear Reactor Regulation |
| To: | Sieber J DUQUESNE LIGHT CO. |
| References | |
| IEB-88-002, IEB-88-2, TAC-M67296, TAC-M67297, TAC-M72922, TAC-M82210, TAC-M82211, NUDOCS 9212140099 | |
| Download: ML20125C835 (3) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION o
WASHINGTON, D. C. 20555 December 9, 1992 Docket Nos. 50-334 and 50-412 Serial No. BV-92-045 Mr. J. D. Sieber, Vice President Nuclear Group Duquesne Light Company Post Office Box 4 Shippingport, Pennsylvania 15077-0004
Dear Mr. Sieber:
SUBJECT:
WESTINGHOUSE REASSESSMENT OF BULLETIN X802 FOR BEAVER VALLEY POWER STATION, UNITS 1 AND 2 (TAC NOS. M67296, M67297, M72922, M82210, M82211)
The Beaver Valley Power Station, Units 1 and 2 were identified by Westinghouse as plants requiring an update of the steam generator tube fatigue evaluations performed by Westinghouse in response to NRC Bulletin 88-02.
The update was required as a result of NRC staff concerns regarding the accuracy of the antivibration bar insertion depth estimates and the associated flow peaking factor estimates.
Your letter of July 12, 1991, provided the reassessment which identified 4 additional tubes in Steam Generator A and 2 additior.al tubes in Steam Generator C at Unit 1, and I additional tube in each of Steam Generators A and C at Unit 2 which required preventive action.
You advised that all of the identified tubes have been plugged with leakage limiting plugs.
The staff concludes that your actions resolve the issues identified in Bulletin 88-02 and are acceptable.
This finding is subject to the development of administrative controls by you to ensure that updated stress ratio and fatigue usage calculations are performed in the event of any significant changes to the steam generator operating parameters (e.g., steam pressure and flow circulation ratio) relative to those assumed in the WCAP analysis.
Implementation of the additional administrative controls may be subject to verification by an NRC staff inspt". tion.
If, for any reason, you do not plan to implement such administrative controls, please advise us not later than January 15, 1993.
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Mr. J. D. Sieber Your facility is no longer subject to the enhanced primary-to-secondary leak rate monitoring program required by item C.1 of the bulletin.
Sincerely, Original signed by Albert W. De Agazio, Sr. Project Manager Project Directorate I-4 Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation cc:
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s-f Mr. J. D. Sieber Beaver Valley Power ftation Duquesne Light Company Units 1 & 2 cc:
Jay E. Silberg, Esquire Bureau of Radiation Protection Shaw, Pittman, Potts & Trowbridge Pennsylvania Department of 2300 N Street, NW.
Environmental Resources Washington, DC 20037 ATTN:
R. Janati Post Office Box 2063 Nelson Tonet, Manager Harrisburg, Pennsylvania 17120 Nuclear Safety Duquesne Light Company Mayor of the Borrough of Post Office Box 4 Shippingport Shippingport, Pennsylvania 15077 Post Office Box 3 Shippingport, Pennsylvania 15077 Commissioner Roy M. Smith West Virginia Department of Labor Regional Administrator, Region 1 Building 3, Room 319 U.S. Nuclear Regulatory Commission Capitol Complex 475 Allendale Road Charleston, West Virginia 25305 King of Prussia, Pennsylvania 19406 John D. Borrows U.S. Nuclear Regulatory Commission Resident Inspector Director, Utilities Department Public Utilities Commission Post Office Box 181 180 East Broad Street Shippingport, Pennsylvania 15077 Columbus, Ohio 43266-0573 Director, Pennsylvania Emergency Management Agency Post Office Box 3321 Harrisburg, Pennsylvania 17105-3321 Ohio EPA-DERR ATTN: Zack A. Clayton Post Office Box 1049 Columbus, Ohio 43266-0149