ML19256G426
| ML19256G426 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 12/07/1979 |
| From: | Clayton F ALABAMA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-79-02, IEB-79-2, NUDOCS 7912310274 | |
| Download: ML19256G426 (2) | |
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Alabama Power Company 600 North 18th Street 6
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I Post Office Box 2641 d'
Birmingham. Alabama 35291 Telephone 205 323-5341
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] Il? ? lIl O2*3I the soumern ewre sp:em December 7, 1979 Docket No. 50-348 Mr. J. P. O'Reilly U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W.
Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
In response to I.E.Bulletin 79-02, Revision 2, Pipe Support Base Plate Designs Using Concrete Expansion Anchor Bolts dated November 8, 1979, Alabama Power Company submits the attached response for Farley Nuclear Plant Unit 1.
Yours truly, F. L. Clayton, Jr.
FLCJr/HRF:bhj Attachment cc:
Mr. R. A. Thomas Mr. G. F. Trowbridge Office of Inspection and Enforcement Div. of Reactor Operations Inspection Washington, D.C.
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4 ATTACHMENT Response to Items 1 thru 4 These items were addressed previously in Alabama Power Company's response to I. E.Bulletin 79-02 Rev. 1 and supplement 1 dated August 5, 1979.
Response to Item 5 In early November, 1979 a walkdown of Farley Nuclear Plant Unit 1 was performed in order to determine the extent of Seismic. Class I pipe supports attached to Loncrete block walls. No supports were found attached to block walls with expansion anchor bolts. One pipe support was found which was attached to a block wall using through-wall bolts with base plates on each side. The structural integrity of this wall and its capacity to withstand the pipe support loadings has been verified.
Response to Item 6 All concrete expansion anchors on pipe supports within the scope of the Farley Nuclear Plant Unit 1 79-02 program were tested, analyzed, and were replaced as necessary regardless of whether a base plate or structural steel member was used. For those supports using structural shapes, special analyses were performed to determine anchor bolt loadings. It is estimated that fewer than 1% of the supports at Farley Nuclear Plant Unit 1 were constructed in this manner.
Response to Item 7 All testing, analyses, and repairs of concrete expansion anchors within the scope of the Farley Nuclear Plant Unit 1 79-02 program were completed prior to Unit 1 returning to power operation November 5, 1979.
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