ML20058M947
| ML20058M947 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 10/01/1993 |
| From: | Trottier E Office of Nuclear Reactor Regulation |
| To: | Frizzle C Maine Yankee |
| References | |
| GL-92-01, GL-92-1, TAC-M83479, NUDOCS 9310070189 | |
| Download: ML20058M947 (4) | |
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E UNITED STATES Q
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October 1, 1993
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Docket No. 50-309 Mr. Charles D. Frizzle, President Maine Yankee Atomic Power Company 83 Edison Drive Augusta, Maine 04336
Dear Mr. Frizzle:
1
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION--MAINE YANKEE RESPONSE TO GENERIC LETTER 92-01, REACTOR VESSEL STRUCTURAL INTEGRITY, REVISION 1 (TAC NO. M83479)
In your letter dated July 2,1992, Maine Yankee responded to Generic Letter (GL) 92-01, Reactor Vessel Structural Integrity, Revision 1.
The staff has complated its preliminary review of your response and requests the following information:
1.
Your response to Question 2a does not specify unirradiated upper shelf energy (USE) values for axial welds 2-203 and 3-303.
Please provide i
either the unirradiated Charpy USE for each forging, or provide the unirradiated Charpy USE and analysis from forgings and welds that were fabricated using the same vendor, fabrication time frame, fabrication process, and material specification. This information is required to demonstrate that the forgings and welds will meet the USE requirements of Appendix G to 10 CFR Part 50.
If this information can not be provided, please submit an analysis demonstrating that lower values of USE will provide margins of safety against fracture that are' equivalent to those required by Appendix G to the ASME Boiler and Pressure Vessel Code.
2.
Your response to Question 2b appears to contain a discrepancy in the chemical composition of circumferential weld 9-203. As shown in the fol' lowing table, weld data in WCAP-12819 differs from that presented in Table 5.1 of the G. D. Whittier (Maine Yankee) letter to A. C. Thadani (USNRC). The Whittier letter was in response to the pressurized thermal shock (PTS) rule (10 CFR 50.61).
Circumferential Weld 9-203 Chemical Element WCAP-17819 PTS Response Copper 0.36%
0.31%
Please resolve this apparent discrepancy by providing the correct copper content, and the basis for the content, to characterize this weld.
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fg Charles D. Frizzle October 1, 1993 In addition,-your response to GL 92-01 did not provide chemical composition values (phosphorous and sulfur) for axial uelds 2-203 and 3-203.
Please provide the phosphorous and sulfur content values for these welds.
To assist the staff in completing its final review on schedule, please provide the requested information within 60 days of receipt of this letter. Do not hesitate to contact me if you have any questions on this matter.
The requirements of this letter affect fewer than 10 respondents, and therefore are not subject to Office of Management and Budget review under P.L.96-511.
Sincerely, Original signed by E. H. Trottier, Preject Manager Project Directorate T-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION:
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i.r Charles D. Frizzle. October 1, 1993 l
In addition, your response to GL 92-01 did not provide chemical composition values (phosphorous and sulfur) for axial welds 2-203 and 3-203.
Please provide the phosphorous and sulfur content values for these welds.
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To assist the staff in completing its final review on schedule, please provide the requested information within 60 days of receipt of this letter. Do not hesitate to contact me if you have any questions on this matter.
l The requirements of this letter affect fewer than 10 respondents, and
.i therefore are not subject to Office of Management and Budget-review under P.L.96-511.
Sincer.hr;--
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E. H. Trottier, Project Manager-Project Directorate I-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page
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y Mr. Charles D. Frizzle Maine Yankee Atomic Power Station i
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cc:
Mr. Charles B. Brinkman Mr. James R. Hebert, Manager Manager - Washington Nuclear Nuclear Engineering and Licensing Operations Maine Yankee Atomic Power Company l
Combustion Engineering, Inc.
83 Edison Drive i
12300 Twinbrook Parkway, Suite 330 Augusta, Maine 04336 Rockville, Maryland 20852 Mr. Robert W. Blackmore Thomas G. Dignan, Jr., Esquire Plant Manager l
Ropes & Gray Maine Yankee Atomic Power Company One International Place P.O. Box 408 Bosten, Massachusetts 02110-2624 Wiscasset, Maine 04578 Mr. Uldis Vanags Mr. G. D. Whittier, Vice President State Nuclear Safety Advisor Licensing and Engineering State Planning Office Maine Yankee Atomic Power Company State House Station #38 83 Edison Drive Augusta, Maine 04333 Augusta, Maine 04336 i
Mr. P. L. Anderson, Project Manager Mr. Patrick J. Dostie Yankee Atomic Electric Company State of Maine Nuclear Safety 580 Main Street Inspector Bolton, Massachusetts 01740-1398 Maine Yankee Atomic Power Company' P. O. Box 408 i
Regional Administrator, Region I Wiscasset, Maine 04578 U.S. Nuclear Regula' ry Commission
-475 Allendale Road Mr. Graham M. Leitch King of Prussia, Pennsylvania 19406 Vice President, Operations Maine Yankee Atomic Power Company First Selectman of Wiscasset P. O. Box 408 j
Municipal Building Wiscasset, Maine 04578 U.S. Route 1 Wiscasset, Maine 04578 Mr. Daniel G. Mcdonald Lead Project Manager, GL 92-01 i
Mr. J. T. Yerokun 0WFN 14-B-2 l
Senior Resident Inspector Maine Yankee Atomic Power Station U.S. Nuclear Regulatory Commission P. O. Box E Wiscasset, Maine 04578 l
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