ML20005A400
| ML20005A400 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 06/18/1981 |
| From: | Hamilton L SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | |
| Shared Package | |
| ML20005A398 | List: |
| References | |
| ISSUANCES-OL, NUDOCS 8106300284 | |
| Download: ML20005A400 (5) | |
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of:
SOUTH CAROLINA ELECTRIC &
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GAS COMPANY, et al.
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Docket No. 50-395-OL (Virgil C. Summer Nuclear
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Station, Unit 1)
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SUPPLEMENTARY TESTIMONY OF LEONARD D. HAMILTON, M.D.,
CONCERNING THE HEALT.. EFFECTS OF RADON FROM URANIUM MINING AND MILLING The purpose of my supplementary testimony is to give estimates of the health effects to individuals residing near uranium mines and mills in accordance with my profiled testimony of May 28, 1981, at page 9.
Exhibit LH-6 separate'ly estimates the maximum health effects to individuals residing near uranium' mines and mills.
These estimates represent the risk to the maximally exposed individuals, i.e.,
those in the downward direction of the prevailing winds for the model site.
- Moreover, because radioactivity in the mill surroundings builds up during operation, exposure reaches a maximum in its final year of operation.
For this reason, annual doses were calculated for the fifteenth year of operation, assuming it to be the final operating year of the model mill.
The method followed in making the health estimates was similar to that used in my testimony in Exhibits LH-2 and LH-3, except that all the risk estimators were derived from BEIR III, 1980.
810'6 30 0 MN
For perspective, GEIS NUREG-0706 (using its own risk estimators that differ slightly from these in BEIR III, 1980 but which do not significantly affect the results) has estimated the potential health effects to the entire popu-lation within 50 miles (80 km) of the model mill as a result of fifteen years of mill operation (p. 6-39).
"For the average individual living in the model region, the probability of a premature cancer death as a result of fifteen years of mill operation is about to4.1x10gtharangefrom8.4x10-7 2.0 x 10-6 w The risk to the average individual of premature death from cancer due to fifteen years of mill oparation represents about 0.001% increase in the natural risk from cancer."
The risk to the average individual living in the region within 50 miles of an open pit mine would be roughly 40% of the above figures, and for an underground mine, much less.
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t EXHIBIT - LH-6'
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Excess canccr Mortality Rick for cc Individuel Residing Near a Model Uranium Mill Due to Exposu're During Final Year of Mill Operation Exposure (mrem) a/
Excess Cancer Mortality Risk D/
Distance whole whole km mi body lung bone bo'dy lung bone sum 1
0.62 31.6 690 160 5.2 10-6 4,o to 4.3 10-7 4.6 10-5 2
1.24 9.4 230 66 1.5 10-6 1,3 to-5 :. 8 10-7 1.5 10-5 10 6.21 0.,65 19.2 2.6 1.0 10-7 1.1 10-6 7.0'10-9 1.2 10-6 20' 12.43 0.2 8.4 0.7 3.2 10-8 4,9 to-7 1.9 10-9 5.2 10-7 1.2 10-7 1.2 10-7 100 62.1 2
Excess Cancer Mortality Risk for an Individuti Residing hear a Model Opeu-Pit Nine Scaled From Exposure During Final Year of Mill Operation c_/
Excess Cancer Mortality Risk.
Distance whole lan mi body lung bone sum 1
0.62 2.3 10-6 1.7 10-5 1,9 to-7 2.0 10-5 2
1.24 6.5 10-7 5.6 104 7.8 10-8 6.4 10-6 10 6.21 4.3 10-8 4.8 10-7 3.0 10-9 5.2 10-7 20 12.42 1.4 10-8 2.1 10-7 8,2 10-10 2.3 10-7 100 62.1 5.2 10-8 5.2 10-8 a_/ Doses are taken from log-log plots in NUREG-0706, pp. 6-26 to 6-30.
The locations are downwind of the prevailing winds (ibid., p. 6-24).
b/ Risk estimators are derived from BEIR III 1980: whole body 158, lung 58, and bone'2.7 deaths per 10-6 rem.
c/ Exposure flom an open pit mine was scaled from that from the
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uranium mill by a factor representing the. ratio of the radon emissions from an open pit mine (NUREG-0757 February 1981 p. 4-3 diviced by those from a mill (NUREG-0706 September 1980, p.
5-8).
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P00R ORIGINAL
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE_THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of:
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SOUTH CAROLINA ELECTRIC &
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GAS COMPANY and
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SOUTH CAROLINA PUBLIC SERVICE
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Docket No. 50-395 OL AUTHORITY
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(Virgil.C. Summer Nuclear
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Station)
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CERTIFICATE OF SERVICE I hereby certify that copies of " Supplementary Testimony of Leonard D. Hamilton, M.D.,
Concerning the Health Effects of Radon From Uranium Mining and Milling" in the above captioned matter, were served upon the following persons by deposit in the United States mail, first class postage prepaid, this 18th day of June, 1931.
Herbert Grossman, Esq.
Chairman, Atomic Safety and Chairman, Atomic Safety and Licensing Board Panel Licensing Board U.S. Nuclear Regulatory U.S. Nuclear Regulatory Commission Ccmmission Washington, D.C.
20355 Washington, D.C.
20555 George H.
Fischer, Esq.
Dr. Frank F. Hooper Vice President and Group School of Natural Resources Executive-Legal Affairs University of Michigan South Carolina Electric &
Ann Arbor, Michigan 48109 Gas Company Post Office Box 764 Kr. Gustave A. Linenberger Columbia, South Carolina 29202 Member, Atomic Safety and Licensing Board Panel Mr. Chase R. Stephens U.S. Nuclear Regulatory Docketing and Service Section Commission Office of the Secretary Washington, D.C.
20555 U.S.
Nuclear Regulatory Commission Chairman, Atomic Safety and Washington, D.C.
20555 Licensing Appeal Board Panel-U.S. Nuclear Regulatory Richard P. Wilson, Esq.
Commission Assistant Attorney General Washington, D.C.
20555 South Carolina Attorney General's Office P.O. Box 11549 Columbia, South Carolina 29211
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Mr. Brett Allen Bursey Joseph'B. Knotts, Jr., Esq.
Route 1, Box 93-C Debevoise & Liberman Little Mountain, S.C.
29076 Attorneys at Law 1200 Seventeenth Street, N.W.
Steven C. Goldberg, Esq.
Washington, D.C.
20036
. Office of the Executive Legal Director U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Y k Ra6dolgli R.
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