ML20004B913
| ML20004B913 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/22/1981 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8106010299 | |
| Download: ML20004B913 (2) | |
Text
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BALTIMO R E GAS AND ELECTRIC CHARLES CENTER.P. O. BOX 1475 BALTIMORE, MARYLAND 21203 ARTHUR C. LUNDVALL. dR.
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May 22, 1981
- sum, Mr. D. G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555
SUBJECT:
Calvert Cliffs Nuclear Power Plant Units 1 & 2 Docket Nos. 50-317 & 50-318 Reactor Vessel Pressurized Thermal Shock
REFERENCE:
(a) Letter from D. G. Eisenhut to All Licensees of Operating PWR's dated April 20, 1981 (b) Letter from K. P. Baskin (CfDG) to D. G.
Eisenhut (NRC-NRR) dated March 15, 1981
Dear Mr. Eisenhut:
Reference (a), which forwarded minutes of the meeting between PWR owners groups and the NRC en March 31, 1981, requested a response from the various owners group and each member utility addressing l
concern surrounding pressurized thermal shock events.
Mr. K. P.
l Baskin of Southern California Electric submitted the Combustion l
Engineering Owners Group (CEOG) response (reference (b)). The CEOG has authorized Combustion Engineering (C-E) to prepare a program which has been sent to each of the members for review. We are nov evaluating the C-E proposal.
Topics addressed by the CIDG program include determination of:
(1) NSSS transients which can produce pressurized thermal shock (2) stress distributions within, and mechanics.1 behavior of, the reactor vessel in response to such transients (3) relevant mechanical properties of the reactor vessel l
(h) margins available to assure preservation of reactor l
vessel integrity (5) current radiation conditions of the reactor vessel for
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Mr. D. G. Eisenhut Page 2 May 22, 1981 We expect the specifies of the program to be more throughly discussed at the CEOG meeting scheduled early next month (June 1981). If any additional infornation is required, we would be pleased to provide it to you.
Very truly yours,
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J. A. Biddison, Esquire G. F. Trowbridge, Esquire Mr. E. L. Conner, Jr. - NRC
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