ML15223A666
| ML15223A666 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 10/24/1980 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 8011060096 | |
| Download: ML15223A666 (4) | |
Text
ODCTOBER.
2 41980 NSIC GLainas NRC PDR ORB#4 Rdg TNovak L PDR NRR Rdg RReid TERa-3 DEisenhut MFairtile Dockets Nos.
-26 50-270 and 50-287 Sang Bo Kim RPurple PKuo JRoe FSc;hauer RTedesco HMrnstei6 Mr. William 0. Parker, Jr.
EBlIa 'ckwood.,,
Vice President -
Steam Production IE7,
Duke Power Company 1 -,
AC-i,6
P. 0. Box 2178 Bo S
i 422 South Church Street' 7AEOD...
Charlotte, North Carolina 2824 Gra. FIle Dear Mr. ParkerJ In order to complete our review of the structural and seismic portions of your Oconee Units Nos. 1 and 2 common spent fuel pool submittal of, July 1980, we find that e edudtional I aio we tranmittd these questions to your staff, by t-e-ecopy," on October 1,90.Tencosed' Duke Powe Coman 190S-h e request for additional informa~t,',i id'entica to -th Ocober1 7 teoy.
The December 22, 1978 letter referenced'in the enclosure has been previousl 46iti6 ~
~
CTBE 6-2 4-1980.i
.I.
supplied to your contractor,i W ftheus sCorporat on.
Kindly provide the requested i nformation tber 31, 1980 in order that Kinlyprvie hereuete ifomaio by. Octoe 31 90 i rer th we may meet your rack installation schedule.
We discussed this date with your staff.
.s Sincerely,.
Original signed by Robert W. Reid Robert W. Reid, Chief Operafing Reactors Branch #4 Division of Licensing
Enclosure:
Request for Additional Information cc w/enclosure:
See next page 801106009 C
ORB#4:DL4 8+ C-:D OFFICE.
S A MFairtile/cb S U R N M E...
1 0IV80 10L 0
NRC-FORM 318 (9 76) NrCM:
-0'._GOVEQN!EN"T DP NTING OFICE: 1979-289-369
UNITED STATES o0
.NUCLEAR REGULATORY COMMISSION ULMASHIhGTON, D. C. 20555 October 24, 1980 Dockets Nos. 50-269, 50-270 and 50-2a7 Mr. William 0. Parker, Jr.
Vice President - Steam Production Duke Power Company P. 0. Box 2178 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Parker:
In order to complete our review of the structural and seismic portions of your Oconee UnitsRos. 1 and 2 cormon spent fuel pool submittal of July T, 1980, we find that we need adtitional information.
We transmitted these questions to your staff, by taleccpy, on October 17, 1980.
The enclosed request for additional inforn'ation is identical to the October 17 telecopy.
The December 22, 1978 Tetter referenced in the enclosure has been previously supplied.to your contractor, iestinghouse Corporation.
Kindly provide the requested infomation by October 31, 1980 in order that we may meet.your'rack installation schedule.
We discussed this date with your staff.
Sincerely, eobrt W.
Chief Operating Reactors Branch P4 Division of Licensing
Enclosure:
Request for Additional Informati on cc w/enclosure:
See next page
Duke Power Company cc w/enclosure(s):
Mr. William L. Porter Mr. Robert B. Borsum Duke Power Company Babcock & Wilcox P. 0. Box 2178 Nuclear Power Generation Division 422 South Church Street Suite 420, 7735 Old Georgetown Road Charlotte, North Carolina 28242 Bethesda, Maryland 20014 Oconee Public Library Manager, LIS 201 South Spring Street NUS Corporation Walhalla, South Carolina 29691 2536 Countryside Boulevard Clearwater, Florida 33515 Honorable James M. Phinney County Supervisor of Oconee County J. Michael McGarry, III, Esq.
Walhalla, South Carolina 29621 DeBevoise & Liberman 1200 17th Street, N.W.
Washington, D. C. 20036 Director, Technical Assessment Division Office of Radiation Programs (AW-459)
U. S. Environmental Protection Agency Office of Intergovernmental Relations Crystal Mall #2 116 West Jones Street Arlington, Virginia 20460 Raleigh, North Carolina 27603 U. S. Environmental Protection Agency Region IV Office ATTN:
EIS COORDINATOR 345 Courtland Street, N.E.
Atlanta, Georgia 30308 Mr. Francis Jape U. S. Nuclear Regulatory Commission P. 0. Box 7 Seneca, South Carolina 29678
Enclosure REQUEST FOR ADDITIONAL INFORMATION OCONEE SPENT FUEL POOL MODIFICATION
- 1. Provide minimum design margins and design limits for the spent fuel pool in a tabulated form.
A sample format is given below.
TABLE OF MARGINS AND LIMITS COMPONENTS DESIGN LIMIT DESIGN MARGIN*
(PSI)
Concrete 3,000 Steel (R-Bar) 30,000 Liner
- DESIGN MARGIN =
design limit calculated stress
- 2. Provide expected maximum amount of Tateral slide of fuel rack, if any, with respect to liner of the pool.
If no sliding is expected, provide calculated maximum horizontal and vertical uplift forces.
Also provide sliding force (critical) above which one expects the rack to slide.
- 3. Discuss briefly how the sliding forces are calculated.
Describe mathmematical model of interface between fuel assembly and rack and between fuel rack support and bottom pool liner.
- 4. Provide value for the sliding friction for the fuel rack and liner' for a lateral motion. Discuss how the friction value is obtained.
- 5. It appears that, based on the calculation, you concluded that the fuel rack will not slide or sliding will be minimal. The calculation was based on' a highly non-linear analysis (doubly non-linear; one from gap between fuel assemblies and fuel rack and the other non-linearity from sliding friction element between rack and pool liner). Discuss verification of the calculation by an independent means such as experiment.**
- 6. During earthquake, suppose the racks slide laterally contrary to your calculations. What is the safety implication when they slide and impact on side wall of the pool.
Can the pool liner be adequately protected? What.is the thickness of the liner and how is it fastened to the concrete surface?
Our record shows that the WECAN code, the tool for the non-linear analysis, has not been fully reviewed and approved by NRC (see the letter from R. J. Bosnak to J. F. Stolz dated December 22, 1978).