ML19241B893

Discusses Problems Experienced W/Pipe Support Baseline Design,As Outlined in IE Bulletin 79-02 & Transmitted to ASLB on 781207.Criteria for Design of Steel Embedments Prevents Problems Occurring

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 o nwer 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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