ML16341D647
| ML16341D647 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 02/28/1986 |
| From: | Schierling H Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8603130296 | |
| Download: ML16341D647 (8) | |
Text
Docket Nos.:
50-275 and 50-323 February 28, 1986 LICENSEE:
Pacific Gas and Electric Company (PGSE)
FACILITY:
Diablo Canyon Nuclear Power Plant, Units I and 2
SUBJECT:
MEETING
SUMMARY
- RERACKING OF SPENT FUEL POOLS On February 20, 1986 the NRC staff and its consultant met with PGSE to discuss certain structural aspects of the proposed spent fuel racks and the spent fuel pools.
The meeting notice and list of attendees are provided in Enclosures 1 and 2.
PGRE had prepared draft responses to NRC questions 26 and 27 which were sent to PGEE by letter dated February 18, 1986.
K. Singh of Joseph Oat Corporation, designer and manufacturer of the proposed
- racks, discussed the responses in detail and provided,,additional clarification and background information.
The staff requested the following further clarifi-cation and details be included in the responses:
1.
Regarding Item 26 on the validation of the computer code
- DYNAHIS, the specific benchmark problems should be identified and appro-priately referenced.
The results, including response comparisons, of problems run with the DYNAHIS code and the ANSYS code should be provided.
Discuss the extent of use of the DYNAHIS code in reracking applications by other utilities.'
Item 26a*).
1 2.
Regarding Item 27 on load combinations for the, racks, each of the critical loading cases for'he rack module qualification and stability consideration should be described in detail", including a summary description of other'ases that were considered in the development of the final rack design.
Discuss quantitatively/
qualitatively why these loading cases'envelope other loading arrangements that can exist';
Disc'uss the potential and safety margin for over turning the limiting rack module.
( Item 27a*).
S. Bhattacharya of PGSE discussed in detail the design and qualification of the fuel pool liner and structure for the proposed increased storage capacity of the spent fuel pools.
Viewgraphs used in the discussion are provided in Enclosure 3.
As a result of the discussion the staff requested that the following additional information be provided (note:
numbering continued from above):
3.
Discuss the effect of the added weight of the racks and fuel assemblies on the building response.
(Item 28*).
- This numbering is a continuation of previous staff requests for additional information.
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February 28, 1986 Discuss the potential for,and consequence of rack module interaction with the pool wall.
(Item 29*).'
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Discuss how postulated sliding of the racks cou'ld affect the fuel pool floor if an airspace is assumed to exist underneath the liner, for example, as a 'result of concrete shrinkage.
(Item 30*).
6.
Provide details on the spent fuel cask pit, including dimensions of the recessed
- area, depth of the pit,--distance from "Rack Module E" to the edge of the pit.
Discuss the cask restraining device shown in the FSAR.
(Item 31*).
7.
Discuss the spent fuel pool leak chase
- system, including the frequency for leakage monitoring and applicable technical specifications and operating procedures.
( Item 32*).
The staff requested that the response to Items 26 and 27 (NRC letter of February 18, 1986), including the additional information in Items 1
through 7 (i.e, Items 26a,
- 27a, 28 through 32) above should be provided by March 7, 1986.
PGIIE stated that the Unit 1 outage could start as early as early in July 1986.
The new fuel for Cycle 2 of Unit 1 is scheduled to arrive at the site in mid-June.
In order to complete the proposed spent fuel pool reracking by the above dates the modifications would have to be started in early April.
The staff stated that three requests for intervention/
hearing have been received.
The staff is continuing its evaluation of the proposed reracking.
A final determination regarding no significant hazards consideration, if appropriate, must be issued prior to issuing a license amendment on the reracking.
/s/HSchierling
Enclosures:
As stated Hans E. Schierling, Senior Project Manager PWR Project Directorate No.
3 Division of PWR Licensing-A cc w/enclosures:
See next page P D-3 PAD-3 CVogan HSchi sng;ps 02/Sa/86 02/
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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 Hr. Malcolm H. Furbush Vice President - General Counsel Pacific Gas 8 Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esq.
California Public Utilities Commission 350 McAllister Street San Francisco, Cali fornia 94102 Hr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.
4623 More Mesa Drive Santa Barbara, California 93105 Hs. Elizabeth Apfelberg 1415 Cozadero San Luis Obispo, Ca 1 iforni a 93401 Hr. Gordon A. Silver Hs.
Sandra A. Silver 1?60 Alisal Street San Luis Obispo, California 93401 Harry M. Willis, Esq.
Seymour
& Willis 601 California Street, Suite 2100 San Francisco, California 94108 h'r. Pichard Hubbard MHB Technical Associates Suite K
1725 Hamilton Avenue San Jose, Cal ifornia 95125 Resident Inspector/Diablo Canyon NPS c/o US Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Hs.
Raye Fleming 1920 Hattie 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 8 Co-Publisher South County Publishing Company P. 0.
Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.
Norton, Burke, Berry
& French, P.C.
202 E. Osborn Road P. 0.
Box 10569 Phoenix, Arizona 85064 Hr.
W.
C. Gangloff Westinghouse Electric Corporation P. 0.
Box 355 Pittsburgh, Pennsylvania 15230 David F. Fleischaker, Esq.
P. 0.
Box. 1178 Oklahoma City, Oklahoma 73101 Hr. John Harrs, Hanaging Editor San Luis Obis o Count Telegram Tribune 1321 Johnson venue P. 0.
Box 112 San Luis Obispo, California 93406
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Pacific Gas
& Electric Company Diablo Canyon CC:
Arthur C. Gehr, Esq.
Snell
& Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. Leland M. Gustafson, Manager Federal Relations Pacific Gas
& Electric Company 1726 M Street, N.W.
Suite 1100 Washington, DC 20036-4502 Regional Administrator, Region 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 Mr. Tom Harri s Sacramento Bee 21st and 0 Streets Sacramento, California 95814 Mr. H. Daniel Nix Gal ifornia Energy Commi ss ion 1516 9th Street, MS 18 Sacramento, California 95814 Lewis Shollenberger, Esq.
US Nuclear Regulatory Commission Region Y
1450 Maria Lane Suite 210 Walnut Creek, California 94596 Mr. Thomas Devine Government Accountability Project Institute for Policy Studies 1901 gue 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 Facilities Siting Division Energy Resources Conservation and Development Commission 1516 9th Street Sacramento, California 95814 President California Public Utilities Commission California State Building 350 McAllester Street San Francisco, California 94102 Mr. Joseph
- 0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building 88 Sacramento, California 95814
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