ML16341E079

Requests Info & Clarification Per 870206 Submittal Re rack-to-rack Interactions Prior to 870218 Meeting in San Francisco,Ca

ML16341E079
Person / Time
Site:	Diablo Canyon
Issue date:	02/11/1987
From:	Schierling H Office of Nuclear Reactor Regulation
To:	Shiffer J PACIFIC GAS & ELECTRIC CO.
Shared Package
ML16341E080	List: ML16341E079 ML16342B270
References
NUDOCS 8703020400
Download: ML16341E079 (8)

Text

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A 4y*y4 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 February ll, 1987 ENCLOSURE tIocket Nos.

50-275 and 5O-323 Mr. J.

D. Shiffer, Vice President Nuclear Power GeneI'ation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106

SUBJECT:

REQUEST FOR INFORMATION ON RACK TO RACK INTERACTIONS Based on our review of your submittal of February 6, 1987 on the subiect, we require further information and clarification on certain aspects as identified in the Enclosure.

We intend to discuss these matters with you in a meeting on February 18, 1987 in San Francisco and request that you provide us with your responses prior to the meeting.

If you have any questions please call me.

Sincerely,

Enclosure:

As stated

- VJx Hans Schierlino, nior Prol'ect Manager Proiect Directorate k3 Division of PWR Licensing-A cc:

See next page 00 8702l'II'-.

+8'7030~

+ ~ 05000275":

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Mr. J.

D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC:

Philip A. Crane, Jr.,

Esq.

Pacific Gas

& Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Malcolm H. Furbush Vice President - General Counsel Pacific Gas

& Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esq.

California Public Utilities Commission 350 McAllister Street San Francisco, California 94102 Mr. Frederick Eissler, President Scenic Shoreline Preservation

'onference,,Inc.

4623 More Mesa Drive Santa

Barbara, California 93105 Ms. Elizabeth Apfelberg 1415 Cozadero San Luis Obispo, California 93401 Ms. Sandra A. Silver 660 Granite Creek Road Santa

Cruz, California 95065 Harry M. Willis, Esq.

Seymour

& Willis 601 California Street, Suite 2100 Sari Francisco, California 94)08 Mr. Richard Hubbard MHB Technical Associates Suite K

]725 Hamilton Avenue San Jose, California 95125 Arthur C. Gehr, Esq.

Snell

& Wi lmer 3100 Valley Center

Phoenix, Arizona 85073 NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.

Box 369 Avila Beach, California 93424 Ms.

Raye Fleming 1920 Mattie Road Shell Beach, California 93440 Joel

Reynolds, Esq.

John R. Phillips, Esq.

Center for Law in the Public Interest 10951 West Pico Boulevard Third Floor Los Angeles, California 90064 Mr. Dick Blankenburg Editor

& Co-Publisher South County Publishing Company P. 0.

Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.

c/o Philip A. Crane, Esq.

Pacific Gas and Electric Company Post Office Box 7442 San Francisco, California 94)20 Mr.

W.

C. Gangloff Westinghouse Electric Corporation P. 0.

Box 355 Pittsburgh, Pennsylvania 15230 David F. Fleischaker, Esq.

P.

0, Box 1178 Oklahoma City, Oklahoma 73)0)

Managing Editor San Luis Obispo County Teleoram Tribune 1321 Johnson Avenue P. 0.

Box 112 San Luis Obispo, California 93406

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I Pacific Gas

& Electric Company Diablo Canyon CC:

Dr.

R.

R. Ferguson Siera Club - Santa Lucia Chapter Rocky Canyon Star Route Creston, California 93432 Mr. Leland M. Gustafson, Manager Federal Relations Pacific Gas

& Electric Comnany 1726 M Street, N.W.

Suite 1100 Washington, DC 20036-4502 Reg iona 1 Admini s trator, Reg ion V

U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Michael J.

Strumwasser, Esq.

Special Counsel to the Attorney General State of California 3580 Wilshire Boulevard, Suite 800 Los Angeles, California 90010 Dian M. Grueneich, Esq.

Edwin F. Lowry, Fsq.

Grueneich

& Lowry 345 Franklin Street San Francisco, California 94102 Ms. Jacquelyn Wheeler 2455 Leona'treet San Luis Obispo, California 93400 Lewis Shollenberger, Esq.

US Nuclear Regulatory Commission Region Y

1450 Maria Lane Suite 210 Walnut Creek, Cali fornia 94596 Mr. Thomas Devine Government Accountability Proiect Institute for Po 1 icy Studi es 1901 Que Street, NW Washington, DC 20009 Chairman San Luis Obispo County Board of Supervisors Room 220 County Courthouse Annex San Luis Obispo, California 93401 Director Energy Faci 1 ities Si ting Divis ion Energy Resources Conservation and Development Commission 1516 9th Street Sacramento, California 95814 President California Public Utilities Commission California State Building 350 McAllister Street San Francisco, California 94102 Mr. Joseph 0.

Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Buildinq k'8 Sacramento, California 95814 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Ms. Laurie McDermott, Coordinator Consumers Organized for Defense of Environmental Safety 731 Pacific Street, Suite 42 San Luis Obispo, California 93401

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ENCLOSURE RE/VEST FOR INFORMATION DIABLO CANYON SPENT FUEL POOL EXPANSION RACT-TO-RACK INTERACTIONS l.

In the single and the multirack studies, the effects of rotational degrees of freedon were not included.

Provide iustification for not includina these effects.

Discuss the potential contribution of rocking motions.

2.

In the single and the multirack studies, the low coefficient of friction of 0.2 was used.

However, the prior analysis indicated that the hiah coefficient of friction of 0.8 would yield hiqher impact forces.

Justify the use of the lower coefficient of friction.

3.

To account for the fluid coupling effects, the distances between the adjacent rows of racks considered are 7.5 inches for the multirack and infinity for the single rack analysis.

Provide a comparison usinq a

consistent distance for the two cases which conservatively bounds the cross-coupling effects for (I) maximum impact, and (2) maximum displacement.

Use of a smaller distance, such as 7.5 inches, would require justification for the condition when adjacent racks move in phase with the modelled racks.

4.

Discuss in more detail the results of each analysis, including the time-history of displacement for each degree of freedom and the time-history of impact forces.

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