ML20024E008
| ML20024E008 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/25/1983 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8308090024 | |
| Download: ML20024E008 (5) | |
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L. Mcket File JUL 2 51983 NRC PDR L PDR i
Docket Nos. 50-338
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OELD EJordan Mr. W. L. Stewart JTaylor ACRS-10 Vice Pmsident - Nuclear Operation.s,
Grai File.
Virginia Electric and Power Company Post Office Box 26666 RAClark i
Richmond.. Virginia 23261 ' '
PMKreutzdr-3 LEngle
Dear Mr. Stewart:
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SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION-SPENT FUEL POOL STORAGE CAPACITY EXPANSION,; NORTH' ANNA, UNITS NO.,1.AND NO, 2 (NA-1&2).
The NRC staff has complate'd 'its review of the structural a,spects of, your submittal dated Augus,t,20.1982..asl noted,in. the sutiject above.
We find that additional in'fomation is needed before we can complete our myiew. The additional information mque' teid is provided in the s
enclosure to this letter. ~ This requested infomation was provided to you by telecopy on July 18,1_983 in order to allow you as much time as possible in preparing your response..
~
We request that the additional information specified in the enclosure to this letter be provided for our review by August 31',1983. Should you detemine that this date' cannot be met, please advise us when your submittal can so be provided~1n order that we can maintain control on the scheduling of these matters.
i The information mquested in this letter affects fewer than 10 respondents; therefore OM8 clearance is, not mquired under P. L.96-511.'.
rYgb[higned by
- 3 Robert A. Clark
'c Robert A.' Clark, Chief Operating Reactors Branch #3 Division of Licensing E
Enclosure:
Request for
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Additional Information
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cc: See next page
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Virginia Electric and Power Company c.
cc:
Richard M. Foster, Esq.
Musick, Williamson, Schwartz, Leavenworth & Cope, P.C.
P. O. Box 4579
- Boulder, Colorado 80306 Mrs. Margaret Dietrich Route 2, Box 568 Michael W. Maupin, Esq.
Gordonsville, Virginia 22042 Hunton, Williams, Gay and Gibson P. O. Box 1535 Mr. W. T. Lough Richmond, Virginia 23212 Virginia Corporation Commission-Division of Energy Regulation Mr. Paul W. Purdom P. O. Box 1197' Environmental Studies Institute Richmond, Virginia 23209 Drexel University.
32nd and Chestnut Streets Mrs. June Allen Philadelphia, Pennsylvania 19104 North Anna Environmental Coalition 8720 Lockmoor Circle Atomic Safety and Licensing Wichita, Kansas 67207 Appeal Board Panel U.S. Nuclear Regulatory Commission U.S. Environmental Protection Agency Washington, D. C.
20555 Region III Office ATTN:
Regional Radiation Representative Ellyn R. Weiss, Esq.
Curtis Building
.Sheldon, Harman, Roisman and Weiss 6th and Walnut Streets 1725 I Street, N.W. Suite 506 Philadelphia, Pennsylvania 19106 Washington, D. C.
20006 Regional Administrator Mr. E. W. Harrell Nuclear Regulatory Commission, Region II P. O. Box 402 Office of Executive Director for Oparations Mineral, Virginia 23117 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Mr. Anthony Gambardella Office of the Attorney General 11 South 12th Street - Room 308 Richmond,-Virginia 23219 Resident Inspector / North Anna c/o U.S.N.R.C.
i Route 2, Box 78A Mineral, Virginia 23117 Mr. J. H. Ferguson i
Executive Vice President - Power L
Virginia Electric and Power Company I
Post Office. Box 26666 Richmond, Virginia 23261 i
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ENCLOSURE f
Request for Additional Information Regarding North Anna 1 and 2 Spent Fuel Pool Storage Capacity Expansion Structural Topics 1.
Provide structural drawings for the following:
k, a.
Poisoned racks b.
Pool structure - concrete and reinforcing c.
Pool liner 2.
For the design of the new racks provide a detailed, step-by-step description and key calculations including, but not limited to, the following:
a.
Numerical values of design criteria for all rack materials, unit weights and' component weights, b.
Numerical description and key calculations of the seismic analyses including sketches of all mathematical models and seismic inputs, methods of combining seismic load components and methods of
. combining seismic loads with other loads.
c.
Damping-values for all materials and components (Note: No credit should be taken for fluid damping).
i d.
Results of computations showing how seismic impact-loads were accounted for in the design of the racks.
e.- A tabulation of actual'and allowable stresses for pertinent points in the racks and rack welds as the result of worst-case load
- com'binations.
f.
Details and numerical results of the " drop analysis".
e
e
- .
- g.
A discussion of the design of the rack cells and other pertinent components for local and overall buckling including load data, acceptance criteria and a tabulation of actual and allowable stresses.
h.
A tabulation of sliding and tipping deflections for the racks and factors of safety against overturning.
3.
Provide a listing of all computer codes used for the design / analysis of the racks and analysis of the pool and liner.
Provide a discussion of, the verification for each code.
(The staff's criteria for acceptable verification of codes can be found on page 3.8.1-10 of NUREG-0800, Standard Review Plan).
4.
Provide a detailed description of the analysis of the spent fuel pool structure for the new rack loads; in particular describe the seismic loa' ding and analysis. Describe the methods of analysis of the liner and liner anchors.
Describe how impact of the racks on the pool floor was considered.
Provide key calculations and numerical results of key calculations comparing actual and allowable values of stresses or loads for all pertinent cases.
5.
Since the sliding / tipping analysis of the racks is based on a two dimensional model how was the effect of three dimensional earthquake motion factored into the rack analysis.
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6.
Describe the methods used to account for fluid inertia effects in the following analyses:
a.
Fuel bundle / rack impact analysis
'b.
Rack sliding / tipping analysis c.
Seismic design of the rack structure d.
Seismic analysis of the pool structure 7.
Provide a detailed description of the thermal analysis of the racks, pool
'and liner including numerical values of assumed normal and accident temperatures, methods of performing the analysis, methods of combining thermal with other loads. and pertinent assumptions. 'Is buckling of the liner postulated; if so, provide details.
Include key calculations and recults.
8.
If cask handling in or adjacent to the pool is contemplated, describe the potential structural consequences of a cask drop accident'on the pool-structure including the pool floor, walls and liner.
Provide results of computations showing comparisons of calculated and allowable values for pool structural components including the liner.
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