ML19241B893
| ML19241B893 | |
| Person / Time | |
|---|---|
| Site: | Atlantic Nuclear Power Plant  |
| Issue date: | 07/09/1979 |
| From: | Haga P OFFSHORE POWER SYSTEMS (SUBS. OF WESTINGHOUSE ELECTRI |
| To: | Baer R Office of Nuclear Reactor Regulation |
| References | |
| FNP-PAL-037, FNP-PAL-37, NUDOCS 7907250293 | |
| Download: ML19241B893 (1) | |
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FNP-PAL-037 Cffshore Power Systems July 9, 1979 Mr. Robert L. Baer, Chief Light Water Reactors Branch No. 2 Division of Project Management U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Md.
20852 Re: Docket No. STN 50-437; Pipe Support Baseplate Design using Concrete Expansion Anchor Sc,lts
Dear Sir:
NRC counsel informed the Atomic Safety and Licensing Board on December 7,1978 of certain problems experienced in connection with pipe support baseplate design.
These problems have been further discussed in IE Bulletin 79-02.
We have reviewed the information contained in the bulletin and believe that the criteria for the design of the steel embedments will prevent such problems occurring in the Offshore onwer Systems facility. Our proposed criteria are idc c 'ied below and are written in a format for incor-paration in a future amendment to the PDR at the end of Paragraph 3.8.1.1.5.
" Design of steel embedments will be in accordance with Appendix B of ACI-349 (1979 Supplement). This Appendix was published as a proposed addition to the code in the ACI Journal, August 1978 and was adopted by ACI in July 1979. Design of the steel embedment will account for base plate flexibility.
Load factors and capacity reduction factors will be those identified i. ACI-349-76 as modified by Regulatory Guide 1.142 and Appendix B."
Ver truly y rs, A
P. B. Haga, irector Plant Analysis and Licensing
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