ML20207Q668
| ML20207Q668 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 01/09/1987 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Williams J TOLEDO EDISON CO. |
| Shared Package | |
| ML20207Q669 | List: |
| References | |
| TAC-59950, NUDOCS 8701280489 | |
| Download: ML20207Q668 (2) | |
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Docket No. 50-346 January 9,1987 O
Mr. Joe Williams, Jr.
Senior Vice President, Nuclear Toledo' Edison Company Edison Plaza - Stop 712 300 Madison Avenue Toledo, Ohio 43652
Dear Mr. Williams:
SUBJECT:
PROJECTED VALUES OF MATERIAL PROPERTIES FOR FRACTURE TOUGHNESS PEQUIREPENTS FOR PROTECTION AGAINST PRESSURIZED THERFAL SHOCK EVENTS We have reviewed your letter dated January 20, 1986 which was submitted in response to the Pressurized Thermal Shock (PTS) Rule, 10 CFR 50.61, for Davis-Besse Nuclear Power Station, Unit 1.
We have found the material properties of reactor vessel beltline materials, the projected fluence at the inner surface of the reactor vessel for the end of life of the plant and the calculated RT for the end of life of the plant to be acceptable. The PTS calculated RT is below the screening critaria of 300 F at the expiration dateoftheINhnseand,therefore,meetstherequirementsofthePTSRule.
The PTS Rule requires that the projected assessment of the RT must be updatedwheneverchangesincoreloadings,surveillancemeasuN5entsorother 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 limiting beltline materials throughout the life of the plant to verify that their assumptions remain valid.
In this regard we request that you submit a reevaluation of the RT and comparison withofthepredictedvalueinanyfuturePressure-Temperabesubmittals which are submitted as required by 10 CFR 50, Appendix G.
This recuest is covered under OMB clearance No. 3150-0011.
Our associated Safety Evaluation is enclosed.
Sincerely,
/S/
John F. Stolz, Director PWR Project Directorate #6 Division of PWR Licensing-B
Enclosure:
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i Mr. J. Williams Davis-Besse Nuclear Power Station Toledo Edison Company Unit No. I cc:
Donald H. Hauser, Esq.
Ohio Department of Health The Cleveland Electr'c ATTN:
Radiological Health Illuminating Company Program Director P. O. Box 5000 P. O. Box 118 Cleveland, Ohio 44101 Columbus, Ohio 43216 Mr. Robert F. Peters Attorney General Manager, Nuclear Licensing Department of Attorney Toledo Edison Company General Edison Plaza 30 East Broad Street 300 Madison Avenue Columbus, Ohio 43215 Toledo, Ohio 43652 Mr. James W. Harris, Director Gerald Charnoff, Esq.
(Addressee Only)
Shaw, Pittman, Potts Division of Power Generation and Trowbridge Ohio Department of Industrial Relations 2300 N Street N.W.
2323 West 5th Avenue Washington, D.C. 20037 P. O. Bnx 825 Columbus, Ohio 43216 Mr. Paul M. Smart, President Mr. Harold Kohn, Staff Scientist Toledo Edison Company Power Sitino Commission 300 Madison Avenue 361 East Broad Street Toledo, Ohio 43652 Columbus, Ohio 43216 Mr. Robert B. Borsum President, Board of Babcock & Wilcox County Commissioners of Nuclear Power Generation Ottawa County Division Port Clinton, Ohio 43452 Suite 200, 7910 Woodmont Avenue Bethesda, Maryland 20814 State of Ohio Public Utilities Commission Resident Inspector 180 East Broad Street
.U.S. Nuclear Regulatory Commission Columbus, Ohio 43266-0573 5503 N. State Route 2 Dak Harbor, Ohio 43449 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137