ML19327A548
| ML19327A548 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 07/30/1980 |
| From: | Crouse R TOLEDO EDISON CO. |
| To: | Novak T Office of Nuclear Reactor Regulation |
| References | |
| 639, NUDOCS 8008060364 | |
| Download: ML19327A548 (1) | |
Text
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TOLEDO EDISON RcsAno P. CROUSE vee pres am M&ew Docket No. 50-346
- maing3n, License No. NPF-3 Serial No. 639 July 30, 1980 Director of Nuclear Reactor Regulation Attention:
Mr. Thomas M. Novak, Assistant Director Operating Reactors Division of Licensing United States Nuclear Regulatory Commission Washington, D. C.
20555
Dear Mr. Novak:
This letter provides the final response to your July 23, 1980 request for additional information related to the proposed technical specification changes to suppset fuel cycle 2 operation of the Davis-Besse Nuclear Power Station, Unit 1.
Items 1 and 3 of your request were addressed by our letter of July 29,1980 (Serial No. 638).
Item 2 of your letter reads:
"Please confirm that the ECCS analysis for Davis-Besse Unit 1 Cycle 2 would continue to be in compliance with the criteria of 10CFR50.46 if the staff cladding swelling and rupture models of NUREG-0630 (D. G. Eisenhut (NRC) letter to All Operating Light Water Reactors dated November 9, 1979) were used in your ECCS evaluation model."
A generic evaluation of the effect of ramp rate correlations contained in Draft NUREG-0630 was made using Babcock & Wilcox's (B&W) currently approved ECCS model.
These results were summarized in a letter to the Director, Division of Licensing from B&W (Mr. J. Taylor) dated November 20, 1979. This letter stated that based on B&W's estimates, compliance with 10CFR50.46 is maintained.
The Davis-Besse Unit 1, Cycle 2 ECCS analysis was performed utilizing the currently approved ECCS code (TAFY).
Based on this analysis, the previous evaluation provided in the B&W letter of November 20, 1979 is appropriate to the Davis-Besse Unit 1 Cycle 2 operations. This indicates continued compliance with 136FR50.46.
Very truly yours, A
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THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MACISON AVENUE TOLEDO, OHIO 43652 A008060