ML20215M617
| ML20215M617 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 10/20/1986 |
| From: | Jaffe D Office of Nuclear Reactor Regulation |
| To: | Opeka J NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| REF-GTECI-A-49, REF-GTECI-RV, TASK-A-49, TASK-OR TAC-59964, NUDOCS 8611030074 | |
| Download: ML20215M617 (3) | |
Text
October 20, 1986 DM Oh
-4 Docket No. 50-366 4
Mr. John F. Opeka, Senior Vice President Nuclear Engineering and Operations Northeast Nuclear Energy Company P. O. Box 270 Hartford, Connecticut 06141-0270 De,ar Mr. Opeka:
We are in the process of reviewing your January 23, 1986 submittal regarding Material Properties for Fracture Toughness Requirements for Protection Against Pressurized Thermal Shock (10 CFR 50.61).
In order that we may continue our review, we request that you respond to the enclosed question within 60 days following receipt of this letter.
This request for additional information affects fewer than 10 respondents; therefore, OMB clearance is not required under P L.96-511.
Sincerely, gng:5.aIdgy g David H. Jaffe, Project Manager PWR Project Directorate #8 Division of PWR Licensing-B
Enclosure:
Request for Additional Information cc w/ enclosure:
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Mr. John F. Opeka Millstone Nuclear Power Station 4
Northeast Nuclear Energy Company Unit No. 2 l
CC:
Gerald Garfield, Esq.
Mr. Wayne D. Romberg Day, Berry & Howard Superintendent Counselors at Law Millstone Nuclear Power Station City Place P. O. Box 128 Hartford, Connecticut 06103-3499 Waterford, Connecticut 06385 Regional Administrator, Region I Mr. Edward J. Mroczka U.S. Nuclear Regulatory Commission Vice President, Nuclear Operations Office of Executive Director for Northeast Nuclear Energy Company Operations P. O. Box 270 631 Park Avenue Hartford, Connecticut 06141-0270 King of Prussia, Pennsylvania 19406 Mr. Charles Brinkman, Manager Washington Nuclear Operations '
C-E Power Systems Combustion Engineering, Inc.
7910 Woodmont Avenue Bethesda, Maryland 20814 Mr. Lawrence Bettencourt, First Selectman Town of Waterford Hall of Records - 200 Boston Post Road Waterford, Connecticut 06385 Northeast Utilities Service Company ATTN: Mr. Richard R. Laudenat, Manager Generation Facilities Licensing Post Office Box 270 Hartford, Connecticut 06141-0270 Kevin McCarthy, Director Radiation Control Unit Department of Environmental Protection State Office Building Hartford, Connecticut 06106 Mr. Theodore Rebelowski U.S. NRC P. O. Box 615 Waterford, Connecticut 06385-0615 Office of Policy & Management ATTN:
Under Secretary Energy Division 80 Washington Street Hartford, Connecticut 06106
Enclosure i
s REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION MILLSTONE NUCLEAR POWER STATION, UNIT 2 MATERIAL PROPERTIES FOR FRACTURE TOUGHNESS REQUIREMENTS FOR PROTECTION AGAINST PRESSURIZED THERMAL SHOCK EVENTS 10 CFR 50.61 Please provide the justification for the copper and nickel contents and the initial RT values, as required by paragraph 50.61(b)(iii) of the N
PTSrulewhichklasfollows:
(iii)
"Cu" and "Ni" mean the best estimate weight percent of copper and nickel in the material.
The source of these values must be included in the assessment.
The relationship of the material, on which any measurements were made, to the actual material in the pressure vessel must be described."
For the weld metals, which appear to be controlling for Millstone 2, it would be acceptable to describe the weldments on which measurements were made and relate them to the vessel welds by their weld wire heat numbers, giving the individual measurements or the number of measurements, their range and their average.
If the values in the submittals are not averages, their derivation should be justified.
The weld wire heat numbers are used in our review to compare reported copper and nickel contents with those for other vessels that may have been welded with the same heat of wire.
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