ML16342B292
| ML16342B292 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 04/01/1987 |
| From: | Schierling H Office of Nuclear Reactor Regulation |
| To: | Shiffer J PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8704060020 | |
| Download: ML16342B292 (10) | |
Text
April 1, 1987 Docket Nos. 50-275 and 50-323 Mr. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
Dear Mr. Shiffer:
DISTRIBUTION J.
P NRCPDR N. Thompson Local PDR ACRS( 10)
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Vogan OGC H. Schierling H. Ashar F. Rinaldi E. Jordan D. Jeng B. Grimes R. Ballard E. Rossi L. Chandler "
G. DeGrassi(BNL)
H. Fishman(FRC)
C. Trammell
SUBJECT:
SPENT FUEL RACK ANALYSIS - RE(VEST FOR ADDITIONAL INFORMATION At the meeting on March 26, 1987 you briefed the staff and our consultants on the modelling parameters and results of single and multirack analyses which you recently performed in response to our letter of February 26, 1987.
It is our understanding that you consider this effort as work in progress.
You requested that the information be treated as proprietary.
We have reviewed the analyses you presented and have determined that additional information is required for the staff to complete its evaluation of the design adequacy of the racks, based on the original three dimensional, single rack analysis with conservative assumptions as presented in the spent fuel pool expansion licensing report (PGSE letter DCL 85-306).
In order to clear ly demonstrate that the design values for the racks and fuel assemblies bound the calculated forces resulting from the various assumptions in modelling parameters, a similar three dimensional, single rack analysis should be performed with the more realistic assumptions that were used in your recent two dimensional, single and multirack analyses.
The specific analysis to be performed is described in the Enclosure.
If you need any further clarification of this question or wish to discuss it with the staff, please contact me promptly so that a meeting can be scheduled.
The reporting and/or recordkeeping requirements of this letter affect fewer than ten respondents; therefore, OMB clearance is not required under PL 96-511.
Sincerely,
'87040b0020 870401 PDR ADOCK 05000275 P
Enclosure:
As stated Hans Schierling, Project Manager Project Directorate ¹3 Division of PWR Licensing-A cc:
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'April 1, 1987 Docket Nos.
50-275 and 50-323 Mr. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
Dear Mr. Shiffer:
DISTRIBUTION P.P 11 NRCPDR N. Thompson Local PDR ACRS(10)
PD83 Rdg.
C.
Vogan OGC H. Schierling H. Ashar F. Rinaldi E. Jordan D. Jeng B. Grimes R. Ballard E. Rossi L. Chandler G. DeGrassi(BNL)
H. Fishman(FRC)
C. Traomell
SUBJECT:
SPENT FUEL RACK ANALYSIS - REQUEST FOR ADDITIONAL INFORMATION At the meeting on March 26, 1987 you briefed the staff and our consultants on the modelling parameters and results of single and multirack analyses which you recently performed in response to our letter of February 26, 1987.
It is our understanding that you consider this effort as work in progress.
You requested that the information be treated as proprietary.
We have reviewed the analyses you presented and have determined that additional information is required for the staff to complete its evaluation of the design adequacy of the racks, based on the original three dimensional, single rack analysis with conservative assumptions as presented in the spent fuel pool
'xpansion licensing report (PG8E letter DCL 85-306).
In order to clearly demonstrate that the design values for the racks and fuel assemblies bound the calculated forces resulting from the various assumptions in modelling parameters, a similar three dimensional, single rack analysis should be performed tIIith the more realistic assumptions that were used in your recent two dimensional, single and multirack analyses.
The specific analysis to be performed is described in the Enclosure.
O If you need any further clarification of this question or wish discuss it with the staff, please contact me promptly so that a meeting can be scheduled.
The reporting and/or recordkeeping requirements of this letter affect fewer than ten respondents; therefore, OMB clearance is not required under PL 96-511.
Sincerely,
Enclosure:
As stated Hans Schierling, Project Manager Project Directorate P3 Division of PWR Licensing-A cc:
See next page PD83 HSchi r ~ng 4/] /87 ga 4/
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Mr. J'.
D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC:
Richard F. Locke, Esq.
Pacific Gas
& Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esa.
California Public Utilities Commission 350 McAllister Street San Francisco, California 94102 Ms. Sandra A. Silver 660 Granite Creek Road Santa Cruz, California 95065 Mr. W. C. Gangloff Westinghouse Electric Corporation P. 0.
Box 355 Pittsburgh, Pennsylvania 15230 Managing Editor San Luis Obispo County Telegram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Hr. Leland H. Gustafson, Manager Federal Relations Pacific Gas and Electric Company 1726 M Street, N.
W.
Washington, DC 20036-4502 Dian H. Grueneich, Esq.
Edwin F. Lowry, Esq.
Grueneich
& Lowry 345 Franklin Street San Francisco, California 94102 NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Mr. Dick Blakenburg Editor
& Co-Publisher South County Publishing Company P. 0.
Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.
c/o Richard F. Locke, Esq.
Pacific Gas and Electric Company Post Office Box 7442 San Francisco, California 94120 Dr. R.
B. Fer guson Siera Club - Santa Lucia Chapter Rocky Canyon Star Route Creston, California 93432 Chairman San Luispo 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, Ca'lifornia 95814 Ms. Jacguelyn Wheeler 2455 Leona Street San Luis Obispo, California 93400
1
Pacific Gas 8 Electric Company Diablo Canyon CC:
Ms. Laurie McDermott, Coordinator Consumers Organized for Defense of Environmental Safety 731 Pacific Street, Suite 42 San Luis Obispo, California 93401 Mr. Joseph
- 0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building 88 Sacramento, Cali fornia 95814 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 President California Public Utilities Commission California State Building 350 McAllister Street San Francisco, California 94102 Michael M. Strumwasser, Esq.
Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010
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C ENCLOSURE DIABLO CANYON NUCLEAR POWER PLANT REQUEST FOR ADDITIONAL INFORMATION SPENT FUEL RACK ANALYSIS Analyze a singl.e rack using the 3D model with all parameters the same as those used to analyze Run Nos. "acorn 10" and "acorn 12".(Table 6.8.2 of the licensing report, PGKE letter DCL-85-306), but using the realistic spring constants and hydrodynamic fluid coupling effects consistent with those used for the multirack 2D analysis, described by PG&E as Case 3 in the meeting on March 26, 1987.
Analyze "acorn 10" with a coefficient of friction of 0.8, and "acorn 12", with a coefficient of friction of 0.2.
Provide the responses in a tabular form similar to that provided in Table 6.8.2 of the licensing report including values of R'1 to R6.
Run Nos. "acorn 10" and "acorn 12" were selected as the reference set for the conservative/realistic comparison because the imp>ct forces for this set are the highest, as shown in Table 6.8.2 of the licensing report.
If you can identify a different set of runs with higher impact forces than "acorn 10" and "acorn 12" you should inform us promptly, and prior to performing the requested 3D analysis, in order for us to determine if that set is more appropriate.
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