ML20045H016
| ML20045H016 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/07/1993 |
| From: | Vissing G Office of Nuclear Reactor Regulation |
| To: | Opeka J CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| GL-92-01, GL-92-1, TAC-M83483, NUDOCS 9307160245 | |
| Download: ML20045H016 (4) | |
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UNITED STATES i Agj j
NUCLEAR REGULATORY COMMISSION g. g WASHINGTON, D.C. 20555M1 July 7,1993 Docket No. 50-336 Mr. John F. Opeka Executive Vice President, Nuclear Connecticut Yankee Atomic Power Company Northeast Nuclear Energy Company Post Office Box 270 Hartford, Connecticut 06141-0270
Dear Mr. Opeka:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION CONCERNING RESPONSE TO GENERIC LETTER 92-01, REVISION 1, " REACTOR VESSEL STRUCTURAL INTEGRITY," AS RELATED TO MILLSTONE, UNIT 2 (TAC N0. M83483)
In our review of your responses to Generic Letter 92-01 for Millstone, Unit 2, of July 6,1992, and January 4,1993, we have determined the need for additional information.
For ease of referencing, each request for additional information is related to the corresponding question in GL 92-01.
Question 2a in GL 92-01 The response to GL 92-01 indic tes that the end-of-life (E0L) upper shelf energy (USE) values for three beltline plates would be below the 50 ft-lb screening criterion when Regulatory Guide 1.99, Revision 2 was used.
Either provide the Charpy USE for each beltline plate or provide the Charpy USE and analysis from plates that were fabricated using the same vendor, fabricator time frame, fabrication process, and material specification to demonstrate that all beltline plates will meet the USE requirements of Appendix G, 10 CFR 50.
If this cannot be provided, then submit an analysis which demonstrates that lower values of upper-shelf energy will provide margins of safety against fracture equivalent to those required by Appendix G of the ASME Code.
Question 2b in GL 92-01 The response to GL 92-01 reports two sets of chemical compositions for the upper circumferential weld, 8-203, and the mid circumferential weld, 9-203.
Specify and provide justification for the selection of the chemical compositions, which will be used in future ART., and 4USE calculations, for these welds.
We request your response within 60 days of receipt of this letter.
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Mr. John F. Opeka July 7, 1993 This requirement affects one respondent and, therefore, is not subject to Office of Management and Budget review under P.L.96-511.
Sincerely, Original signed by:
Guy S. Vissing, Senior Project Manager Project Directorate I-4 Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation cc:
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Mr. John F. Opeka July 7, 1993 This requirement affects one respondent and, therefore, is not subject to Office of Management and Budget review under P.L.96-511.
Sincerely,
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Guy S. Vissing, Senior P oject Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:
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Mr. John F. Opeka Millstone Nuclear Power Station j
Northeast Nuclear Energy Company Unit 2 cc:
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Gerald Garfield, Esquire R. M. Kacich, Director l
Day, Berry and Howard Nuclear Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President J. P. Stetz, Vice President Nuclear Operations Services Haddam Neck Plant Northeast Utilities Service Company Connecticut Yankee Atomic Power. Company Post Office Box 270 362 Injun Hollow Road Hartford, Connecticut 06141-0270 East Hampton, Connecticut 06424-3099 Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region I Department of Environmental Protection U.S. Nuclear Regulatory Commission 165 Capitol Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Allan Johanson, Assistant Director First Selectmen Office of Policy and Development Town of Waterford Policy Development & Planning Division Hall of Records 80 Washington Street 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Vice President P. D. Swetland, Resident Inspector Millstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U.S. Nuclear Regulatory Commission Post Office Box 128 Post Office Box 513 Waterford, Connecticut 06385 Niantic, Connecticut 06357 J. S. Keenan, Nuclear Unit Director Charles Brinkman, Manager Millstone Unit No. 2 Washington Nuclear Operations Northeast Nuclear Energy Company ABB Combustion Engineering Post Office Box 128 Nuclear Power Waterford, Connecticut 06385 12300 Twinbrook Pkwy, Suite 330 Rockville, Maryland 20852 Nicholas S. Reynolds Winston & Strawn G. H. Bouchard, Director 1400 L Street, NW Nuclear Quality Services Washington, DC 20005-3502 Northeast Utilities Service Company Post Office Box 270 Hartford, Connecticut 06141-0270 1
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