ML20042C197
| ML20042C197 | |
| Person / Time | |
|---|---|
| Site: | Clinch River |
| Issue date: | 03/23/1982 |
| From: | Stark R Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8203310016 | |
| Download: ML20042C197 (3) | |
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March 23, 1982 O
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l Docket No.: 50-537 ygg{nnc:gzu
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/7, APPLICANT: Department of Energy, TVA and PMC g
FACILITY:
Clinch River Breeder Reactor
SUBJECT:
SUlfMRY OF MEETINGS WITH APPLICAflTS ON THERIML MARGIN BEYOND DESIGN BASIS (TM808) ON JANUARY 15 AND FEBRUARY 10, 1982 l
A meeting was held on January 15 in Room 5033, Air Rights Building, Bethesda, Maryland at which the applicants discussed their thermal j
margin to accommodate accidents beyond the design basis. The applicants presented some preliminary results of sensitivity studies on their base case scenario. These variations provided for penetration of concrete by l
sodium at a rate of (1) one inch per hour continuously until the sodium l
was boiled away, and (2) seven inches per hour for three hours and one inch per hour thereafter. The subsequent effects of the scenario were i
calculated, and the applicants preliminary conclusion was that both scenarios could be accomodated within the dose to public limitations of 10 CFR 100. Ilowever, the second variation would require an enlargement of the proposed cleanup system and would lead to venting through the l
cleanup system as early as 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> from the start of the accident. The l
applicants reviewed the sodium concrete reaction data that they are l
using and the calculations leading to estimates of containment pressures and the temperatures. The applicants indicated a preference for the use of on-site dolomitic aggregate, but expressed a willingness to substitute calcitic aggregate if that is shown to have clear safety advantages.
l The applicants requested a follow-up meeting at which the ongoing test programs at ilEDL and SANDIA on sodium concrete reactions would be reviewed.
l On February 10, in Room 1111, Landow Building, Bethesda, Maryland, the l
requested follow-up meeting was held. The ilEDL and SANDIA programs and l
results were presented.
It is apparent that the realistic ultimate depth of penetration appropriate for a large accident cannot be determined from the experimental work and modeling done so far. However, an ultimate limit can probably be used to bound the accident consequences. 11eanwhile l
experimental work will continue, including a set of experiments devised to cross check the results of the two laboratories on identical samples of calcitic and dolomitic concrete.
Original signed by:
Richard M. Stark Richard M. Stark, Project Manager 8203310016 820323 CRBR Program Office PDR ADOCK 05000 Office of Nuclear Reactor Regulation c
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. cc: Dr. Cadet H. Hand, Jr., Director Barbara A. Finamore Bodega Marine Laboratory S. Jacob Scherr University of California Ellyn R. Weiss P. O. Box 247 Dr. Thomas B. Cochran Bodega Bay, California 94923 Natural Resources Defense Council, Inc.
Daniel Swanson 1725 I Street, N.W.
Office of the Executive Suite 600 Legal Director Washington, D.C.
20006 U. S. Nuclear Regulatory Commission Eldon V. C. Greenberg Washington, D.C.
20555 Tuttle & Taylor 1901 L Street, N.W.
William B. Hubbard, Esq.
Suite 805 Assistant Attorney General Washington, D.C.
20036 State of Tennessee Office of the Attorney General L. Ribb 450 James Robertson Parkway LNR Associates Nashville, TN 37219 Nuclear Power Safety Consultants 8605 Grimsby Court William E. Lantrip, Esq.
Potomac, MD 20854 City Attorney Municipal Building P. O. Box 1 Oak Ridge, TN 37830 George L. Edgar, Esq.
Morgan, Lewis & Bockius 1800 M Street, N.W.
Washington, D.C.
20036 Herbert S. Sanger, Jr., Esq.
General Counsel Tennessee Valley Authority Knoxville, TN 37902 Chase Stephens, Chief Docketing and Service Section Office of the Secretary U. S. Nuclear Regulatory l
Commission Washington, D.C.
20555 Raymond L. Copeland Project Management-Corp.
P. O. Box U Oak Ridge, Tennessee 37830
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Distribution iDocket File.
bcc: Applicant Service List NRC PDR Local PDR NSIC CRBRP0 File H. Denton D. Eisenhut R. Vollmer R. Mattson S. Hanauer H. Thompson J. P. Knight W. Johnston D. Muller P. Check R. W. Houston L. Rubenstein F. Schroeder M. Ernst ACRS (16) 01&E (3)
S. Treby (0 ELD)
V. Moore B. Grimes R. Woodruff Region II Administrator ED0 (4)
L. S. Tong NRC Participants J. A. 01shinski, Reg. II R. E. Ireland, NRC-Idaho J. Austin B. D. Liaw J. Glynn P. Wood Receptionist - Phillips Bldg.
CRBR Staff J. Long R. Jackson Charlie Thayer, Reactor Training Center, Chattanooga N. Lauben B. Sheron l
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