ML20030E012
| ML20030E012 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/01/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Pierce L NEW ENGLAND POWER CO. |
| References | |
| LSO5-81-09-001, LSO5-81-9-1, NUDOCS 8109170284 | |
| Download: ML20030E012 (3) | |
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September 1,1981 s I r p, j s hr8 '
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L505-81-09-001 Mr. Louis Pierce C
SEP 0 21981 > r Chief Civil Engineer 5
v.a. g 7 'I New England Power Service Company 20, Turnpike Road p
-Westborough, Massachusetts 01581 4
Dear Mr. Pierce:
The Nuclear Regulatory Commission is currently performing a systematic evaluation of eleven of the oldest licensed nuclear power plants in the United States in order to determine how well these plants conform to the current licensing criteria that anply to new power plants. One subject currently under review for the Yankee-Rowe Nuclear Station, which is located on the Upper Deerfield River, is the stability of dams and other structures upstream of the plant.
Our consultant, the U. S. Army Corps of Engineers, is performing a seismic stability analysis of the Harriman Dam and additional information is necessary for them to complete our review.
Enclosed is a letter from our consultants detailing this additional information. Our conversations with you and Yankee Atomic Electric Company, have indicated that you may already have available much of the information regarding the materials in the dam. As discussed with you recently, we would like to have our consultant visit the dam and meet with you to discuss its construction and the material properties. We would like to schedule this visit in late September and we will be coordinating the times and locations with you, the Federal Energy Regulatory Commission, and Yankee Atomic.
Please contact the Yankee-Rowe Project Manager, Mr. Ralph Caruso (301-492-7232) if you have any questions.
Sincerely.
Dn s M. Crutchfiefd, OperatingReactorsBran/ hie ch #5 Division of Licensing 8109170284 810901 l
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Mr. Louis Pierce September 1,1981 i
Enclosure:
As stated cet Mr. James A. Kay Senior Engineer-Licensing Yankee Atomic Electric Company f
1671 Worcester Road Fruiingham. Massachusetts 01701 Mr. Harry Thomas Inspection Branch Federal Energy Regulatory Ccmmission 825 horth Capital Street. NE Mailstop 108RB Washington. D. C.
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Mr. Lot's Pierce - Septt.mber 1,1981
Enclosure:
As stated cc: Mr. James _A. Kay-Senior Engineer-Licensing Yankee Atomic Electric Company 1671 Worcester Road Framingham, Massachusetts 01701 Mr. Harry Thomas Inspection Branch Federal Energy Regulatory Commission 825 North Capital Street, NE Mailstop 108RB Washington, D. C.
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Dear Mr. Lear:
l Tne Waterways Experiment Station (WES) is assisting the Nuclear Regulatory Cocnission (NRC) in the Safety Evaluation Program as provided by Interagency l
Agreement No. NRC-03-81-122. One of the tasks of this effort is to review Yankee Rove Nuclear Power Plant. Accordingly, we have reviewed the following:
a.
Yankee Atomic Electric Company (YAEC) Report, March 1979, " Analysis /
Calculation for Containment of Somerset Reservoir Storage in Harriman Reservoir,
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Yankee Rowe Plant."
b.
NRC draft report, 26 January 1981, " Draft Flood Study - Yankee Rowe Nuclear Plant and Upper Deerfield River Basin."
c.
Eaton, A, C., " Davis Bridga Power Project to Develop 60,000 HP,"
Engineering News Record, Vol 92, No. 4, 24 January 1924, pp. 142-146.
d.
Eaton, A.
C., " Building the Highest Hydraulic Fill Dam," Engineering News Record, Vol 92, No. 6, 7 February 1924, pp. 235-238.
e.
Collins, E. B. and Wilson, H.
R., "The Davis Bridge Power Plant Development of the New Er. gland Power Compeny," General Electric Review, Vol XXVII, No. 10, October 1924, pp. 665-672.
f.
Chas T. Main, Inc., "Harriman Dam Stability Anc +ysis," report prepared for the New England Power Company, December 1979.
New England Power Company, " Inspection Report for New England Power g.
l Company - Deerfield River Project," report by Chas T. Main, Inc., August 1968.
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New England Power Company, "Second Inspection Report of the New England Power Company - Deerfield River Project," report by Chas T. Main, Inc., October 1973.
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New England Power Company, '.' Third Inspection Report of the New England Power Company - Deerfield River Project," report by Chas T. Main, Inc., October
.1978.
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- j. NRC, " Summary of Site Visit and Harriman Das Inspection for Yankee Rowe Review," 17 December 1979.
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NRC, " Site Visit to. Yankee Rowe Nuclear Plant and Hydraulic Meeting with Yankee Atomic, TERC, and New. England Power Company," 21 January.1.';d0.,
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.YAEC,~" Scope of Work and Technical Specifications'for the Drilling Contractor to Install Piezonecers and Obtain Soil Samples ar
- ' -- nm (Revision 1)," April 1930.
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.New England Power Company, " Report on Laboratory Tests on Samples from Harriman Dam, VI," report by Geotechnical Engineers, Inc., 16 November 1979.
n.
NRC, " Meeting with FERC Regarding Dams Near Yankee Rowe," 15 October 1979.
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Davis Bridge Dam, Record of *.hli Drill Holes, July 1921-April 1922.
p.
Miscellaneous drawings which were furnished L/ the utility.
As requested, in our review of the above documents we have spo.cifically addressed an evaluation or assessment of the dynamic stability of Harrir n Dam, which is located approximately six miles upstream of the Yankee Rowe Nuclear Power Plant. The failure of this dam for any reason when the-pool is above elevation 1490 f t mean sea level will producs a flood level at the Yankee Rowe site that is anywhere from 15 to 70 ft above plant grade (see FRC draft report entitled " Draft Flood Study-Yankee Rowe Nuclear Power Plant and Upper Deerfield River Basin," dated 26 January 1981). Therefore, the stability of Harriman Dam is crucial to the operation and safe shutdown of the Yankee Rowe Power Plant.
Our review of the above-listed documents indicates that additional information i? required for WES to properly evaluate the stability of Harriman Dam.
Specifically, additional information is requested in the following areas:
a.
Design earthquake. Insufficient discussion is given to the local and-regional geology and local and regional seismicity to determine if the seismic coefficients used in the pseudostatic analyses are appropriate. Additional discussion should include the attenuacion laws.used for the region. If dynamic finite element analysis-is required, the selection of the " design" earthquake will need to be evaluated.
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Soil profile. Additional infor. nation is required to determine the representative soil prnfile parallel to the axis of the dam, upstream, down-stream, and along the cen*-r line of the dam.
c.
Strength degradation of the various materials believed to be representa-tive of the nonplastic soils in the foundation, shell, and core of the dam.
Static and dynamic laboratory tests on undisturbed sa=ples of this material U111 'bh required' to detiermine 'if ' cyclic ~allj 1riduced~ ~ trength' degradation is' 'a '
s problem. We understand that undisturbed san.ples are difficult to obtain.
Test pits may be the only alternative available; however, one must evaluate the strength degradation properties of the material to determine the type of analysis (liquefaction or permnent deformation) appropriate for the stability calculations.
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Uniformity of the dam and lcundation rarerials. Additional Standard Penetr'ation Test (SPT) results and/or cone penetration test results are recommenced to determine the uniformity of the foundation materials and the dam itself. It is possible that this information presently exists in the utility's files, and WES has reviewed a fair amount of this information; however, it is not presented in a fashion which lends itself to evaluation.
It is suggested that typical cross sections might be prepared. Boring logs could be placed on these cross sections. Adjacent to boring logs, a plot of SPT "N" values versus depth could be shown. Different symbols could be used*to l
' define the type of materials in which the "N" values were obtained.
This infor-l mation would also be useful in obtaining a clearer picture about'the soil profiles requested in subparagraph b,above.
I e.
In situ dynamic soil properties. Information regarding the compressica j
l and shear-wave velocities as a function of depth should be provided.
From the information requested above, it may be possible to evaluate the dam and detetnine whether it is safe er unsafe.
It is also possible that after evaluating this information it will not be possible to make a determination about the safety of the dam, and additional in! creation may still be required.
If this is the case, then additional information regarding dynamic soil preperties l
and the results of.one-and, possibly, two-dimensional finite element. analyses used to determine the dynamic response of the dam will be required.
If vou havs any question's regarding zur
-view, please contact Dr. W. F.
Marcuson, III, at FTS 542-2217.
Sincerely,
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F. R.
ROWN h Engineer.
Technical-Director CF:
Dinesh Gupta, NRC 3
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