ML18003A619
| ML18003A619 | |
| Person / Time | |
|---|---|
| Site: | North Anna, Harris  |
| Issue date: | 07/06/1979 |
| From: | Mcduffie M CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 7908070821 | |
| Download: ML18003A619 (4) | |
Text
Carolina Power 8 Light Company July 6, 1979
~ 27 fl7 Mr. James P. O'Reilly, Director Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Atlanta, Georgia 30303 SHEARON HARRIS NUCLEAR POWER PLANT, UNIT NOS. 1, 2, 3 AND 4 DOCKET NOS. 50-400, 50-401, 50-402, AND 50-403 IE BULLETIN 79-02 REVISION 1
Dear Mr. O'Reilly:
In response to your letter of March 8, 1979, Carolina Power
& Light Company has investigated for the use of pipe support base plates using concrete expansion anchor bolts at the Shearon Harris Nuclear Power Plant.
We do not plan to use concrete expansion anchor bolts for this service, however, if it becomes necessary the following criteria will be met:
1.
Pipe support base plate flexibilityand its effect on anchor bolts will be accounted for in the calculation of anchor bolt design loads.
A finite element analysis will be used for design.
2.
The concrete expansion anchor bolts will be designed for a minimum factor of safety of four between the bolt design load and the bolt ultimate capacity determined from static load test for wedge type anchor bolts.
We do not intend to use shell or sleeve type anchor bolts.
3.
Por seismic loads and other vibratory cyclic loads the concrete expansion anchor bolts will be preloaded equal to or greater than the anchor bolt design load.
411 Fayetleville Street
~ P. O. Box 1551
~ Raleigh. N, C, 27602 7 fo(1 SP)PKFAL COPY
>908 OVO g'Z/
H 1
Mr. James P. O'Reilly 4.
Quality Control documentation:will be provided for concrete expansion anchor bolts to confirm that design requirements have been met at the time of installation, i.e., that cyclic loads will have been considered and specified design size and type correctly installed to the proper embedment depth.
Yours very truly, M. A. McDuffie Senior Vice President Engineering 6 Construction RGB/gcb cc:
United States Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D.C.
20555