ML20133B231
| ML20133B231 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 10/01/1985 |
| From: | Mittl R Public Service Enterprise Group |
| To: | Butler W Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8510030103 | |
| Download: ML20133B231 (2) | |
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PS G Company Doctnc and Gas 80 Park Plaza, Newark, NJ 07101/ 201430 8217 MAILING ADDRESS / P.O. Box 570, Newark, NJ 07101 Robert L. Mitti General Manager Nuclear Assurance and Regulation October 1, 1985 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 Attention:
Mr. Walter Butler, Chief Licensing Branch 2 Division of Licensing Gentlemen:
DOCKET NO. 50-354 SER OUTSTANDING ISSUE 1 "RIVERBORNE MISSILES" HOPE CREEK GENERATING STATION A telecon was held on September 23, 1985, between Messrs.
D. Wagner, J.
Ridgley, and J. Wilson of the NRC and Messrs.
B.
- Preston, A.
Kao, and'I. Mermelstein of Public Service Electric and Gas Company (PSE&G) concerning the PSE&G response to Hope Creek Safety Evaluation Report (SER) Out-standing Issue 1 "Riverborne Missiles" as documented in a letter from R. L. Mitti (PSE&G) to W.
Butler (NRC) dated September 16, 1985.
In this regard, PSE&G was requested to clarify the aforementioned correspondence in terms of the ability of the Service Water Pumps (SWP) flange seals and bearing assembly ability to withstand the most limiting riverborne missile strike and maintain leak tightness integrity.
With respect to the above, PSE&G has completed a review of the SWP flange seal and bearing assembly design and notes that the SWPs are seismically qualified to 0.2g accelera-tion.
Given a missile velocity of 16 fps resulting from a dam failure upstream of Hop'e Creek as. calculated and docu-mented in correspondence from R. L. Mittl (PSE&G) to A.
Schwencer (NRC) dated January 31, 1985, and May 8, 1985; the most limiting riverborne missile impacting the Service Water Intake Structure (SWIS) anywhere along the 120 foot width of the structure and compromising the integrity of the SWPs would be represented by a 90 ton missile impacting the SWIS g
at a velocity of 16 fps.
As such a missile of this magnitude when correlated to the energy associated with a k) o\\
0.2g acceleration for the SWPs represents the most limiting i O The99fL4$f%ple 8510030103 851001 PDR ADOCK 05000354
6.
4 Director of-Nuclear Reactor Regulation 2
-10/1/85 In the= event.there are any questions with regard to the above, do not hesitate to contact us.
Very truly yours,
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H. Wagner USNRC Licensing Project Manager A. R. Blough USNRC Senior Resident Inspector L
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