ML19260E286
| ML19260E286 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 01/07/1980 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-79-02, IEB-79-2, NUDOCS 8002150104 | |
| Download: ML19260E286 (2) | |
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'Af (4:2) 458-6000 435 Sixth Avenue Qb,urgh, Pennsylvania JanJarv 7, 1980 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
MR. BOYCE H. GRIER, DIRECTOR
SUBJECT:
Beaver Valley Power Station-Unit No. 2 Pipe Support Base Plate Design Using Drilled-In Anchors Response to IE Bulletin 79 Revision 2 Docket No. 50-412 Gentlemen:
The following is the response by the Duquesne Light Company to Revision 2 of IE Bulletin 79-02 as it applies to Beaver Valley Power Station, Unit 2*.
The item numbers listed in the response are references to similar numbered items in Revision 2 to IE Bulletin 79-02 for which a response is required by Item 9 of the Bulletin.
Item (2)
The minimum factors of safety for the design of concrete anchors used in the construction of Beaver Valley, Unit 2 are as described in the Duquesne Light Company response to IE Bulletin 79-02, dated July 6, 1979. There are no instances in which the lower factors of safety mentioned in IE Bulletin 79-02 (Revision 2) have been used.
Item (4)
Our response to this item has been provided in the Duquesne Light company response to IE Bulletin 79-02, dated July 6,1979. Documentation that the design requirements have been met as described in our July response is available at the site.
Item (5)
No expansion anchor bolts have been installed in concrete block (masunty) walls to attach pipe supports for safety related systems.
Job speci-fications prohibit such installations without approval of the Engineers.
We do not anticipate a need for expansion anchor bolts in concrete block walls.
800215g ls,
United States Nuclear Regulatory Commission Page 2 Item (6)
Seismic Cateogry I pipe supports with expansion anchor bolts using structural steel shapes instead of baseplates have not been specified to date.
If it becomes necessary to use such a design, the effects pf flexibility on the shapes will be considered.
DUQUESNE LIGHT COMPANY M
By (jf.
.T. Woolever Vice President cc: United States Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations Washington, D.C.
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