ML20247Q818
| ML20247Q818 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 07/31/1989 |
| From: | Parker T NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| IEB-79-14, NUDOCS 8908070260 | |
| Download: ML20247Q818 (1) | |
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a Northem States Power Company
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414 Nicollet Mall Minneapolis, Minnesota 55401-1927 Telephone (612) 330-5500 July 31, 1989 Director of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISIAND NUCLEAR GENERATING PIANT Docket Nos. 50a282 License Nos. DPR-42 50-306 DPR-60 Supplemental Information Related to NRC Bulletin 79-14 Consideration of Torsional Moments in Pinine Modifications This letter is provided in respouse to a June 12, 1989 request from the NRC Staff for information regarding the inclusion of torsional moments in future Prairie Island piping modifications.
All future piping modifications will be designed to account for torsional moments when calculations of stresses due to occasional loads are performed.
We will ensure that the addition of torsional moments will not cause stresses due to occasional loads to exceed Updated Safety Analysis Report stress allowables.
Please contact us if you have any further questions related to Prairie Island piping analyses.
s a.,/
Thomas M Parker Manager Nuclear Support Services c: Regional Administrator - Region III, NRC Senior Resident Inspector, NRC NRR Project Manager, NRC J A Gavula, NRC Region III i
G Charnoff Io 8908070260 890731
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PDR ADOCK 05000282 Q
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