ML20210P047
| ML20210P047 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 02/04/1987 |
| From: | Mcneil S Office of Nuclear Reactor Regulation |
| To: | Tiernan J BALTIMORE GAS & ELECTRIC CO. |
| Shared Package | |
| ML20210P050 | List: |
| References | |
| NUDOCS 8702130285 | |
| Download: ML20210P047 (3) | |
Text
r February 4, 1987 Distribu Qi n
{EEEVie[3 Docket Nos. 50-317 PKreutzer and 50-318 NRCKdifal~PDR SMcNeil FMiraglia ACRS(10)
PBD-8 Reading OGC-Beth BGrimes NThompson Mr. J. A. Tiernan JPartlow Vice President-Nuclear Energy EJordan Baltimore Gas & Electric Company.
Gray File 3.2a t
P. O. Box 1475~
Baltimore, MD 21203
Dear Mr. Tiernan:
~
SUBJECT:
PROJECTED VALUES OF MATERIAL PROPERTIES FOR FRACTURE TOUGHNESS REQUIREMENTS FOR PROTECTION AGAINST PRESSURIZED THERMAL SHOCK EVUITS We have reviewed your letters dated January 23, August 29 and December 9, 1986, which were submitted in response to the Pressurized Thermal Shock (PTS)
Rule, 10 CFR 50.61, for Calvert Cliffs Units 1 and 2.
We have found the material properties of reactor vessel beltline materials, the projected fluence at the inner surface of the reactor vessels and the calculated RT for 32 effective full power years (EFPY) of operatien to be acceptable.
Nk calculated RT is below the screening criteria of 270'F at 32 EFPY which was estimated Ib your January 23, 1986 submittal to correspond to the p
expiration of the current operating license of 40 years with an 80% capacity factor and, therefore, meets the requirements of the PTS Rule.
The PTS rule requires that the projected assessment of the RT must be updatedwheneverchangesincoreloadings,surveillancemeasuNkentsorother information (including changes in capacity factor) indicate a significant change in the projected values.
This ensures that the licensees will track the accumulated fluence for the Ifmiting beltline materials throughout the life of the plant to verify that their assumptions remain valid.
In this" regard, we request that you submit a re-evaluation of the RT and a ccmpari-sontothepredictedvalueinanyfuturePressure-Temperatur$Thubmittalswhich are submitted as required by 10 CFR 50, Appendix G.
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This request for,information is covered under OMB Clearance No. 3150-0011.
~
Our associated Safety Evaluation is enclosed.
Sincerely,
/s/
Scott Alexander McNeil, Project Manager PWR Project Directorate #8 Division of PWR Licensing-8
Enclosure:
As stated cc w/ enclosure:
See next page 4
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Mr. J. A. Tiernan Baltimore Gas & Electric Company Calvert Cliffs Nuclear Power Plant cc:
Mr. William T. Bowen, President Regional Administrator, Region I Calvert County Board of U.S. Nuclear Regulatory Commission Commissioners Office of Executive Director Prince Frederick, Maryland 20768 for Operations 631 Park Avenue
.D. A. Brune, Esq.
King of Prussia, Pennys1vania 19406 General Counsel Saltimore Gas and Electric Company P. O. Box 1475 Baltimore, Maryland 21203 Jay E. Silberg Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.W.
Washington, DC 20037 Mr. M. E. Bowman, General Supervisor Technical Services Engineering Calvert Cliffs Nuclear Power Plant
(
MD Rts 2 & 4, P. O. Box 1535 Lusby, Maryland 20657-0073 Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box 437 Lusby, Maryland 20657-0073 Bechtel Power Corporation ATTN: Mr. D. E. Stewart Calvert Cliffs Project Engineer 15740 Shady Grove Road Gaithersburg, Maryland 20760 Combustion Engineering, Inc.
ATTN:
Mr. W. R. Horlacher, III Project Manager P. O. Box 500 1000 Prospect Hill Road Windsor, Connecticut 06095-0500 Department of Natural Resources Energy Administration, Power Plant Siting Program ATTN:
Mr. T. Magette Tawes State Office Building Annapolis, Maryland 21204
,