ML20073J955
| ML20073J955 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 04/26/1991 |
| From: | Woodard J ALABAMA POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML19312B431 | List: |
| References | |
| IEB-88-011, IEB-88-11, NUDOCS 9105090230 | |
| Download: ML20073J955 (2) | |
Text
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rm en a April 26, 1991 10 CFR 50, Appendix A, Criterion 4 Docket Nos. 50-348 50-364 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Vashington, DC 20555 Press'". er Surge Line Leak ".; ore-Break (LBB) Analysis Josenb
- rarley Nuclear Plant - Units 1 and 2 Gentleme In our letter of January 31, 1991, responding to NRC Bulletin No. 88-11, f
Alabama Power Company indicated that a leak-before-break (LBB) analysis vould be performed on Unit 1 and Unit 2 to allow the temoval of the pipe whip restraints.
General Design Criterion 4 allows plants to eliminate the dynamic effects of the rupture of high energy lines from the plant design basis when analyses reviewed and approved by the Commission demonstrate that the probability of fluid system piping rupture is extremely lov.
Alabama Power Company herewith submits for NRC review and approval a detailed LBB analysis.
It is Alabama Power Company's Litent to use this NRC approved
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LBB analysis to eliminate the dynamic efferts of pipe ruptuce in the pressurizer surge lines from the design basi; of Parley Nuclear Plant Units 1 and 2.
Alabama Power Company currently plata on re w ing the pipe thip restraints on both units within two refueling outages following NRC approval of the LBB analysis.
Until the modifications to the restraints are performed, Alabama Power Company has made procedural changes on Unit 2 to limit the delta T in the surge line to less than 310*F vhich vill keep the pipe stress within code allowable as described in Alabama Power Company's response to NRC Bulletin No. 88-11.
The attachment contains:
- 1. VCAP-12835 - Technical justification for eliminating pressurizer surge line rupture from the structural design basis for Parley Units 1 and 2 (Proprietary).
- 2. VCAP-12834 - Technical justification for eliminating pressurizer surge line rupture from the structural design basis for Farley Units 1 and 2 (Non-Proprietary).
Also enclosed are a Vestinghouse authorization letter, CAV-91-152, accompanying affidavit, Proprietary Information Notice, and Copyright Notice.
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l U. S, Nuclear Regulatory. Commission-Page 2 As.VCAP-12835 contains information proprietary to Vestinghouse Electric Corporation, it is supported by an affidavit signed by Vestinghouse, the owner of the information.
The affidavit sets forth the basis on which the information may be withheld f rom public disclosure by the Commission and addresses vith specificity the considerations listed in paragraph (b)(4) of i
Section-2.790 of the Commission's regulations.
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Accordingly, it is respectfully requested that the information which is l
proprietary to Vestinghouse be withheld from public disclosure in accordance l
vith 10 CFR Section 2.790 of the Commission's regulations.
Correspondence with respect to the copyright or proprietary aspects of the items listed above or the supporting Vestinghouse affidavit should reference CAV-91-152 and should be addressed to Mr. R. P. DiPlazza, Manager, Operating l-Plant Licensing Support, Vestinghouse Electric Corporation, P.
O. Box 355, Pittsburgh, Pennsylvania 15230-0355.
In accordance with the requirements of General Design Criterion 4, it is requested that the attached LBB analysis be reviewed and approved for Joseph M.
Farley Nuclear Plant, Units 1 and 2.
If there are any questions, please advise.
Respectfully submitted, ALABAMA POVER COMPANY l
(N'Doodard m
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JDV/JGS:cj r2320 Attachment cct Mr. S. D. Ebneter Mr. S. T. Hoffman Mr.-G P.-Maxwell l
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