ML20040B089
| ML20040B089 | |
| Person / Time | |
|---|---|
| Site: | West Valley Demonstration Project |
| Issue date: | 12/29/1981 |
| From: | Rouse L NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Deuster, Larocca J NEW YORK, STATE OF, NUCLEAR FUEL SERVICES, INC. |
| References | |
| NUDOCS 8201250131 | |
| Download: ML20040B089 (9) | |
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2 9 DEC 198; return original concurrence copy to FBr SS 396 Distribution:owOlease see attached list Docket ! o. 50-?01 5
Uuclear Fuel Services, Inc.
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ATTH:
Talph W. Deuster, President 9
O 6000 Executive Doulevard, Suite 600 Q
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flockville, Pa ryl and 20RS2 C/
1 t[-l J/trl 7pgg Pew York State Energy Research and Developrent Authority C. ' 1"
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ATTM: Jaues Larocca, Chairuan c'
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Agency Buildinq !!o. 2, [>1pire State Pl aza
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Albany, New York 1272" Genti m en:
We are enclosing for your infornation a report on the effect of an earthquake on the racks of the fuel receipt and storage pool at
'lest '/all ey, New York.
The analysis was dcne by Science Applications, Inc.
'le have also cnciased a copy of our o n coanent and evaluation for additional understandinrj.
If you wish to discuss,"ly of this infor:ratien, we wuld be pleased to neet with you.
Si nc erely,
Ol'1 1nal Gigned by 8
Leland C. Rouso Leland C. Rouse, Chief Advanced fuel and Spent Fuel Licensinq 3 ranch Mvision of fuel Cycle and ia terial L'fety
Enclosures:
- 1. Seis :ic Cesistance Capacity F.valuatico of Spent Fuel Storage Racks and Fuel at Uest Valley, des York (iPJCEG/CP-2230).
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EFFECT OF EARTHQUAKE ON SPENT FUEL STORAGE POOL RACKS AT WEST VALLEY DOCKET NO. 50-201 Introduction In our Interim Safety Evaluation I issued in August 1977, the staff discussed fuel receipt and storage at the We' stern Nuclear Service Center IWNYSNSC) at West Valley, New York. We indicated that structural analysis of the effect of earthquake on the fuel storage pool was being undertaken by the Lawrence Livermore Laboratory (LLL).
Although our evaluation indicated there would be no danger to the health and safety of the public, the further analysis of earthquake was intended to better determine the risk to employees.
The report prepared by LLL, Structural Analysis of the Fuel Receiving Station Pool at the Nuclear Fuel Services Reprocessing Plant, West Valley, New York, UCRL-52575, presented the results of their seismic analysis.
Livermore concluded that structural distress could occur at accelerations above sixteen percent of gravity in the pool region in the upper east corner of the north wall of the storagt basin.
Because tic, basin is surraunded by glacial till, the amount of water loss would be low and could be made up from plant supplies. As stated in the Interim Safety Evaluation I, because of the age of the fuel in storage, the water is l
no longer needed as a coolant to prevent cladding damage, but continues to be required for shielding.
Based upon our review of LLL's analysis of the pool structure, the staff concluded that there is no undue risk to the health and safety of the public or employees from the present spent fuel storage activities at the West Valley site. LLL's report and the staff's ccnclusions were issued to the co-licensees and the public unde our transmittal letter dated May 14, 1919..
Analysis of Fuel Pool Racks Because the LLL analysis cor;idered only the pool structure itself, the staf f decided to conduct further analysis of the effects of earthquake on the fuel storage racks. This analysis, conducted by our consultant, Science Applications, Inc. (SAI) is documented in the accompanying report entitled, " Seismic Resistance Capacity Evaluation of Spent Fuel Storage Racks and Fuel at West Valley New York" (NUREG/CR-2236).
Based on staf f review of information submitted by Nucleer Fuel Services, Inc. and its own independent sources of information, the staf f concluded that a site seismic design acceleration of 0.29 was appropriate for new addi tions and modi fications. The fuel receipt and storage pool was
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f built to Uniform Building Code Zone III specifications during the period 1964-1965. Zone III indicates an active egrthquake zone.
In this analysis, we have assessed the capability of the fuel pool racks against the design value of 0.2g.
As discussed in our Interim Safety Evaluation, the staff has also developed information on seismic recurrence intervals i
for the site.
These estimates are equivalent to predicting the probability of the occurrence of a ringle earthquake as a function of its magnitude.
This relationship is shown in Figure 1.
The curva of Figure i represents a fit to Central Stable Region earthquake histories from modified Mercalli intensities IV, VII, and VIII.
i In their analysis, SAI concludes that the bolted splices that join sections of the top rail will begin to yield at 0.199 and will fail at 0.22. These values are based on racks loaded with the heaviest fuel 9
l presently in storage. Following f ailure of the splices, load distributions would shif t and the floor and wall an: hors could fail.
Large deflections i
of the racks would result and fuel cannisters could becone dislodged f rom the racks. Such a gross f ailure of the racks would only result for earthquakes whose acceleration level is greater than the design value i
for the site.
Throughout this evaluation, the attempt has been made to strip the cnalysis of ruch of the conservatism inherent in the method. This is not done becaJse the staff does not want to be conservative in its approach to protection of the public; but rather, the removal of conservatism is necessary in order to realistically determine the risk to the public. The staff continues to require for any new construction thq, conservatism In so' e portions inherent in its guides and regulations and analyses.
m of the analysis it was not always possible to quantify the amount of conservatism present in a calculational step.
In such a case, the conservatism will remain in that portion of the analysis.
If a completely realistic assessment of the racks' seismic capacity could be performed, it is likely that the threshold acceleration levels for failure of the splice and anchor bolts would be even higher.
Restriction on Analysis This analysis is based upon the existing fuel loading of the pool and does not apply to alternate rack configurations.
If alternate rack configurations are contemplated, they must be separately analyzed.
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. Conclusion Based upon this analysis, the staff continues to conclude that there is no undue risk to the health and safety of the public or employees f rom the present spent fuel storage activities at the West Valley site.
Attachment:
Figure 1, Estimate of Probability of Ear.thquake at West Valley, NY.
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.010; Figure 1 Estimate of Probability of Earthquake at West Valley, N.Y.
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VOLUME I DISTRIBUTI0ft Dietribution:
cc:
NFS Distribution List -
ocket File 50-201 (FBrown) flFS ffMSS NYSERDA FCAF RM 50-6 (FBrown)
M-32 (FBrown)
DCS PDR LPDR JGDavis RECunningham TFCarter LCRouse JRoth, R-1 CJHaughney ATClark FBrown (20)
WWTing JWolf JKlucsik JRoberts JCostello, RES JMcCorkle RRentschler IE HQ (3)
fiUCLEAR FUEL SERVICES, IllC.
WEST VALLEY, NEW YORK DISTRIBUTION LIST lichard Lester Research Associates Dr. Robert Fakundiny John Henry Schlegel, Esq.
lockefeller Foundation N.Y. State Geological Survey 32 South Drive 1133 Avenue of the Americas Rm. 973, State Education Buffalo, N.Y.
14226 Building Annex lew York, N.Y.
10035 Albany, N.Y.
12234 Mr. Edward Wagoner B ea o d
g cal Health Citizens' Energy Council of Tower Building High Level Waste Proj.ect Western New York Sa n River Operations h1 on E.
S te P a 1.
14172 A
, y9 k 2237 P.O. Box A County Clerk Aiken, SC 29801 a03 Court Street Cattaraugus County C. J. Clementi, Esq.
Little Valley, N.Y. 14755 Special Counsel N.Y. State Energy Research and Development Authority Sueervisor, Town of Ashford Rockefeller Plaza 133 Depot Street Dr. Marvin Resnikoff, Chen.
Agency Building 2 West Valley, N.Y.14171 nergy, Task Force Albany, N. Y.
12223 Sierra Club, N1agara Group Box 64, Station G Buffalo, N.Y.
14213 Director, Technical Develop-Mr. David Berick Natural Resources Defense Co.
Environn: ental Policy Center ment Programs 917 15th Street, N.W.
317 Pennsylvania Avenue, S.E.
State of New York Energy Washington, D. C.
20005 Washington, D. C. 20003 Office Agency Building 2 Enpire S+ ate Plaza Albany, New York 12223 Ms. Marilyn Metzler Special Energy Project
- Cattaraugus Community Action 200 Erie Street Little Valley, NY 14755 Robert Abrams, Esq.
N.Y. State Department.of Attorney General of the Environtrental Conservation State of New York
' ATTtJ:
Director ATTN:
Richard G. Berger Office of Environmental Deputy Asst. Attorney Analysis General Albany, N.Y.
12201 Two World Trade Center Butzel & Kass New York, N. Y.
10047 45 Rockefeller Plaza flew York, N.Y.
10020 The Honorable Stanley N. Lundine U.S. House of Representatives U.S. Environmental orotection ATTN:
Mary Ann Richardson The Honorable William B. Hoyt Agency Washington, D.C.
20515 Chairman
- ATTN:
EI5 Coordinator Leg 1siative Commission on
! Region II Office Science and Technology State of New York l26 Federal Plaza J. Richardson Lippert, II, Esq.
lNew York, N.Y.
10007 18 South Main Street 13th Floor, Agency Building 4 Franklinville, N.Y.
14737 Assembly P. 0. Box 167 l
Albany, N.Y.
12248
NUCLEAR FUEL SERVICES, INC.
WEST VALLEY, NEW YORK DISTRIBUTION LIST
'aurice Axelrad, Esq.
.cwenstein, Newman, Reis,
& Axelrad iO25 Connecticut Ave., N.W.
..ashingten, DC 20036
- r. Neil J. Newman uclear Fuel Services i300 Executive Blvd.
.ackville, MD 20852
- r. Charles Luner
- rgonne National Laboratory 1700 South Cass Avenue
- rgonne, IL 60439
'arol Mongerson 0734 Sharp Street 3st Concord, NY 14055 lr Robert Ramsey
- hief, Projects Branch ivision of Waste Management
- epartment of Energy
'ermantown, MD MS B-107 s
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VOLUME II DISTRIBUTION DJstribution:
Wocket File 50-201 (FBrown
)
NMSS FCAF (FBrown)
Q(FBrown) l M-32 FBrown DCS PDR LPDR (2)
(FBrown)
NFS NYSERDA ATClark/WWTing LCRouse FBrown (4)
Mr. Robert Ramsey, DOE e