ML20044E918
| ML20044E918 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/17/1993 |
| From: | James Anderson 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-M83482, NUDOCS 9305260283 | |
| Download: ML20044E918 (5) | |
Text
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r May 17, 1993 Docket No. 50-245 Mr. John F. Opeka Executive Vice President, Nuclear Connecticut Yankee Atomic Power Company Northeast Nuclear Energy Company l
Post Office Box 270 i
Hartford, Connecticut 06141-0270
Dear Mr. Opeka:
l l
SUBJECT:
RESPONSE TO GENERIC LETTER 92-01, REVISION 1, " REACTOR VESSEL i
STRUCTURAL INTEGRITY," MILLSTONE NUCLEAR POWER STATION, UNIT 1 (TAC M83482)
The subject Generic Letter (GL) was issued on March 6, 1992, to compile
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information necessary to confirm that licensees and permit holders satisfy the l
requirements for ensuring reactor vessel integrity.
In the GL, the staff 4
requested responses to three questions. These three questions requestad that information be provided regarding:
- 1) Appendix H to 10 CFR Part 50, 2)
Appendix G to 10 CFR Part 50, and 3) Commitments made in responses to GL 88-11.
i By letter dated July 6,1992, Northeast Nuclear Energy Company responded to GL 92-01, Revision 1, by providing the information requested in the Required Information portion of the GL. The staff has completed its initial review of your response and has determined that additional information is needed.
Enclosed is a request for additional information (RAI). We request that the i
response to the RAI be provided within 60 days from receipt of this letter.
The information requested by this letter is within the scope of the overall burden estimated in Generic Letter 92-01, Revision 1, " Reactor Vessel Structural Integrity, 10 CFR 50.54(f)." The estimated average number of burden hours is 200 person hours for each addressee's response.
This estimate pertains only to the identified response-related matters and does not include the time required to implement actions required by the regulations. This action is covered by the Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994.
Sincerely, t
Original signed by:
James W. Andersen, Acting Project Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
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,E WASHINGTON, D. C. 20555 May 17,1993 Docket No. 50-245 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:
RESPONSE TO GENERIC LETTER 92-01, REVISION 1, " REACTOR VESSEL STRUCTURAL INTEGRITY," MILLSTONE NUCLEAR POWER STATION, UNIT 1 (TAC M83482)
The subject Generic Letter (GL) was issued on March 6, 1992, to compile information necessary to confirm that licensees and permit holders satisfy the requirements for ensuring reactor vessel integrity.
In the GL, the staff reouested responses to three questions. These three questions requested that l
information be provided regarding:
- 1) Appendix H to 10 CFR Part 50, 2)
Appendix G to 10 CFR Part 50, and 3) Commitments made in responses to GL 88-11.
l By letter dated July 6,1992, Northeast Nuclear Energy Company responded to GL 92-01, Revision 1, by providing the information requested in the Required Information portion of the GL. The staff has completed its initial review of your response and has determined that additional information is needed.
Enclosed is a request for additional information (RAI). We request that the response to the RAI be provided within 60 days from receipt of this letter.
The information requested by this letter is within the scope of the overall burden estimated in Generic Letter 92-01, Revision 1, " Reactor Vessel Structural Integrity,10 CFR 50.54(f)." The estimated average number of burden hours is 200 person hours for each addressee's response. This estimate pertains only to the identified response-related matters and does not include the time required to implement actions required by the regulations. This action is covered by the Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994.
Sincerely, Jam L W. Andersen, Acting Project Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page
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DISTRIBUTION:
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Mr. John F. Opeka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit I cc:
Gerald Garfield, Esquire R. M. Kacich, Director Day, Berry and Howard Nuclear Licensing Counselors at Law Northeast Utilities Service Company i
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 Roac Hartford, Connecticut 06141-0270 East Hampton, Connecticut 06424-3099 Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region I l
Department of Environmental Protection U.S. Nuclear Regulatory Commission State Office Building 475 AllendLie Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Allan Johanson, Assistant Director First Selectmen Office of Policy and Management Town of Waterford Policy Development and 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 t
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 H. F. Haynes, Nuclear Unit Director G. H. Bouchtrd, Director Millstone Unit No. 1 Nuclear Quality Services Northeast Nuclear Energy Cornany Northeast Utilities Service Company Post Office Box 128 Post Office Box 270 Waterford, Connecticut OufDs Hartford, Connecticut 06141-0270 Nicholas S. Reynolds Winston & Strawn 1400 L Street, NW Washington, DC 20005-3502 m
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RE0 VEST FOR ADDITIONAL INFORMATION e
RELATED TO GENERIC LETTER 92-01. REVISION 1. FOR MILLSTONE NUCLEAR POWER STATION. UNIT 1 DOCKET NO. 50-245 This request for information includes the following:
1)
The Northeast Nuclear Energy Company (NNECO) submittal to Generic l
Letter (GL) 92-01 indicates that the initial upper-shelf energy (USE) values for all beltline submerged arc welds, except for the surveillance weld, are not known. A topical report, NED0-32205, titled "BWR Owners' Group Topical Report on Upper Shelf Energy Equivalent Margin Analysis" regarding beltline materials with low USE, was submitted by General Electric Company (GE) on April 30,
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1993.
NNECO is requested to confirm that this topical report will be used as its licensing bases or provide its plant specific approach to demonstrate that all beltline materials that do not have measured USE will meet requirements of Appendix G, 10 CFR Part 50.
In either case, NNECO must take into account that the measured percent drop in USE ex:eeded the predicted percent drop obtained using Regulatory Guide 1.99, Revision 2.
2)
NNECO's submittal indicates that data from the drop weight test and Charpy test for beltl;ne materials is either absent or incomplete for initial RT determination. An alternative method developed by GE was used,in deriving the initial RT for these 1
materials.
In the GE method, the establishment of INe slope for the transition zone of the Charpy curve is crucial in deriving the initial RT from incomplete test data. NNECO is requested to provideall3 plate and weld Charpy test curves compiled by GE for establishing the 2 ~F per ft-lb slope for the transition zone of the Charpy curve. All test data must be from materials equivalent to (i.e. same vendor, fabrication time frame, fabrication process, material specification, etc.) the beltline materials of the reactor vessel.
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