ML20137S714
| ML20137S714 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 04/09/1997 |
| From: | Boulette E BOSTON EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| BECO-2.97.041, NUDOCS 9704150225 | |
| Download: ML20137S714 (2) | |
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.e Boston Edison Pilgrim Nuclear Power Station Rocky Hill Road Plymouth. Massachusetts 02360 April 9, 1997 E. T. Boulette, PhD BECo Ltr. 2.97.040 Senior vice President - Nuclear U. S. Nuclear Regulatory Commission Attn.: Document Control Desk Washington, DC 20555 Docket No. 50-293 License No. DPR-35 Withdrawal of Reauest for License Amendment Boston Edison Company (BECo) hereby withdraws its application for license amendment dated January 24,1997, as supplemented February 13 and 27,1997. The application and supplements requested a revision to the Updated Final Safety Analysis Report (UFSAR) to allow an alternative method of deriving seismic inputs for the analysis of piping systems specified in the January 24, 1997 letter.
Following a February 25,1997, teleconference in which the NRC clarified acceptable use of the Standard Review Plan methodology, BECo decided to reevaluate the affectLd piping systems using seismic inputs based on existing NRC approved UFSAR analysis criteria and methodology.
Modifications, if required, to ensure the piping systems meet piping code requirements would be installed prior to startup from RFO 11.
The evaluation results demonstrate the affected piping meets applicable acceptance criteria.
Revised pipe stress combinations remain within applicable piping code allowable limits. Revised pipe restraint, equipment nozzle, and containment penetration loads were evaluated and found acceptable. Seismic accelerations for valves with extended flexible operators were evaluated and found acceptable. No physical modifications to the affected piping systems were necessary to requalify the piping in this manner. Therefore, the requested revision to the UFSAR is no longer needed.
A continued review relative to the following correspondence is requested.
BECo letter 94-036, dated April 1,1994, " Request For Approvai of Alternative Reactor e
i Building Response Spectra" NRC letter dated May 23,1996, " Request for Additional Information Regarding Pilgrim Nuclear Power Station Alternative Reactor Building Response Spectra" ADD \\@
BECo letter dated January 24,1997 Attachment C, " Response to Request for r
AdditionalInformation Regarding Pilgrim Nuclear Power Station Attemative Reactor Building Response Spectra" 150120 f!l]ll%)ll]gllg 9704150225 970409 PDR ADOCK 05000293 P
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U. S. Nuctsar R:gulitory Commission
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l The April 1,1994 submittal requests approval of new response spectra and damping for use as an alternate to the existing Pilgrim Station design response spectra and damping for the reactor building. Based on NRC feedback in the February 25,1997, teleconference, we are evaluating other alternatives to the response spectra used in BECo letter 94-036.
BECo appreciates the NRC review efforts undertaken on this issue to date. Should you have any further clarifications or insights relative to our January 24,1997, Attachment C responses, please notify us accordingly.
j E. T. Boulette, PhD l
ETB/JDK/avf/wd-rla i
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l Commonwealth of Massachusetts)
County of Plymouth
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f Then personally appeared before me, E. T. Boulette, who being duly sworn, did state that he is Senior Vice President - Nuclear of Boston Edison Company and that he is duly authorized to execute and file the submittal contained herein in the name and on behalf of Boston Edison Company and that the statements in said submittal are true to the best of his knowledge and belief.
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cc: Mr. Alan B. Wang, Project Manager Mr. Robert Hallisey
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W Project Directorate 1-3 Radiation Control Program Office of Nuclear Reactor Regulation Center for Communicable Diseases Mail Stop: OWF 1482 Mass. Dept. of Public Health 1 White Flint North 305 South Street l
11555 Rockville Pike Jamaica Plain, MA 02130 Rockville, MD 20852 l
Mr. Peter LaPorte, Director l
U.S. Nuclear Regulatory Commission Massachusetts Energy Mgmt. Agency Region i 400 Worcester Road 475 Allendale Road P.O. Box 1496 King of Prussia, PA 19406 Framingham, MA 01701-0313 4
Attn: Mr. James Muckerheide i
Senior Resident inspector Pilgrim Nuclear Power Station i
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