ML20202F110
| ML20202F110 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 07/10/1986 |
| From: | Mark Miller Office of Nuclear Reactor Regulation |
| To: | Conway R GEORGIA POWER CO. |
| References | |
| NUDOCS 8607150096 | |
| Download: ML20202F110 (3) | |
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Docket Nos.: 50-424 and 50-425 10 JUL 1986 Mr. Richard Conway Vice President and Project General Manager Georgia Power Company Route 2, Box 299A Waynesboro, Georgia 30830
Dear Mr. Conway:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING V0GTLE STRUCTURAL DESIGN LIVE LOAD During the staff's review of Readiness Review Module 8, " Structural Steel,"
questions were raised concerning the adequacy of the FSAR to appropriately document the Vogtle live load criteria for design of Category I structures.
As discussed in a July 1,1986, telephone conversation with members of your staff and Bechtel, we require additional information.
The enclosure documents the required infonnation.
We suggest that a meeting take place July 16 or 17, 1986, to fully discuss our questions. Following resolution, the FSAR must be amended to adequately reflect the Vogtle structural design live load.
If you have any questions concerning this matter, contact me at (301)492-7357.
Sincerely,
\\s\\
Melanie A. Miller, Project Manager PWR Project Directorate #4 Division of PWR Licensing-A
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Mr. R. E. Conway Geurgia Power Company Vogtle Electric Generating Plant cc:
Mr. L. T. Gucwa Resident Inspector Chief Nuclear Engineer Nuclear Regulatory Commission Georgia Power Company P. O. Box 572 P.O. Box 4545 Waynesboro, Georgia 30830 Atlanta, Georgia 30302 Mr. Ruble A. Thomas Deppish Kirkland, III, Counsel Vice President - Licensing Office of the Consumers' Utility Vogtle Project Council Georgia Power Company /
Suite 225 Southern Company Services, Inc.
32 Peachtree Street, N.W.
P.O. Box 2625 Atlanta, Georgia 30303 Birmingham, Alabama 35202 James E. Joiner Mr. Donald O. Foster Troutman, Sanders, Lockerman, Vice President & Project General Manager
& Ashmore Georgia Power Company Candler Building Post Office Box 299A, Route 2 127 Peachtree Street, N.E.
Waynesboro, Georgia 30830 Atlanta, Georgia 30303 Douglas C. Teper Mr. J. A. Bailey Georgians Against Nuclear Energy Project Licensing Manager 1253 Lenox Circle Soutnern Company Services, Inc.
Atlanta, Georgia 30306 P.O. Box 2625 Birmingham, Alabama 35202 Billie Pirner Garde Citizens Clinic Director Ernest L. Blake, Jr.
Government Accountability Project Bruce W. Churchill, Esq.
30310th Street Shaw, Pittman, Potts and Trowbridge Augusta, Georgia 30901 1800 M Street, N.W.
Washington, D. C.
20036 Mr. G. Bockhold, Jr.
Vogtle Plant Manager Georgia Power Company Route 2, Box 299-A Waynesboro, Georgia 30830 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323
I ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL DESIGN LIVE LOAD 1.
Provide a list of Category I structures and structural elements for which the application of " live load" in structural design was based on criteria other than those committed to in FSAR Section 3.8.4.3.1.1 and FSAR Tables 3.8.4-1, 3.8.4-2, and 3.8.4-3 (i.e., where live load values of less than 100% of the " maximum design" live load were applied). Describe chron-ologically when such live load criteria was adopted and the design control procedures and structural reevaluation tasks instituted to ensure that the usage of the less than 100% live load criteria was appropriate.
2.
The definition of live load discussed in your May 23, 1986, letter, differed from the definition of live load as given in FSAR Section 3.8.4.3.1.1 in that it broke down the live load into the " maximum design" live load and " anticipated" live load.
Provide the basis of this redefinition. Also, explain the basis for redefining the live load without amending FSAR Section 3.8.4.3.1.
3.
The anticipated live load is defined as 25% of the maximum design live load in some cases. Provide theoretical justification for this assump+1on.
i Also, as applicable, discuss and justify other percentages (less than 100%
other than 25%) of the maximum design live load which may h.ve been used in other cases.
4.
The anticipated live load, not the maximum design live load, is used in the load combination equations involving earthquake load effects.
Provide the basis for the adoption of such desien criteria.
,