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Appendix C: Estimated Thyroid Doses From
Pages 176-197

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From page 176... ... APPENDIX C ESTIMATED THYROID DOSES FROM "GLOBAL" WEAPONS TEST FALLOUT IN AREAS DOWNWIND FROM HANFORD Report prepared for the NAS/NRC Board on Radiation Effects Research Harold L Beck Formerly, Director, Environmental Science Division USDOE Environmental Measurements Laboratory April I, 1999 176 Read the entire page →
From page 177... ... This report estimates the thyroid doses received by infants, children, teens, and adult males for each year of significant testing for three areas (Benson, Franklin and Adams Counties, WalIa Walla County and Stevens County, WA) and compares the results with the NCT results for these same counties for NTS fallout. Read the entire page →
From page 178... ... II. AVAILABLE DATA A number of potential data sources were reviewed including the Quarterly Fallout Reports of the USAEC Health and Safety Laboratory, Reports of Hearings conducted by the US Congress Joint Committee on Atomic Energy. Read the entire page →
From page 179... ... Note that the data indicate significant amounts of I-131 in milk in the summer of 1961, even though there were no weapons tests before September 1961! Note also that the levels in milk varied significantly from dairy to dairy, particularly in late 1962, probably reflecting differences in the amount of feed received from fresh pasture. Read the entire page →
From page 180... ... While the absolute values are probably suspects, the relative annual estimates should still provide a reasonable estimate of the relative short-lived radionuclide deposition that can be used to estimate the fallout deposition in 1956 and 1954. Precipitation: The monthly precipitation for Benton, Franklin Adams, Walia Walia, and Stevens Counties taken from historical US Weather Service Records are listed in Table 5. Read the entire page →
From page 181... ... For 1961 and 1962, the doses for Franklin, Adams and Benton counties were estimated directly from the measured I-131 in milk at farms near Hanford after first correcting the milk data for Hanford plant contributions. Since all three counties are part of the same milk shed and receive similar amounts of rain, the estimated milk concentration data was assumed to apply to all three counties and a single set of dose estimates was made for these three counties. Read the entire page →
From page 182... ... The Hanford Plant contribution probably varied from month to month depending on local meteorological conditions so that the estimated plant contribution is somewhat uncertain. The measured concentrations were highest for the Ringold dairy farm, reflecting a probably greater fraction of feed from fresh pasture, particularly during the fall months when fallout occurred. Read the entire page →
From page 183... ... Also, the total deposition in 1962 through January ~ 963 was calculated but it was decided to use only the deposition through November ~ 962 for calculating milk concentrations. Most of the additional fallout occurred in late December and January when cows were not on pasture from high yield tests conducted in late December. Read the entire page →
From page 184... ... As will be shown later, these T-131 deposition estimates, are in reasonable agreement with the milk estimates based on comparable data from NTS. However, it is important to note that the absolute I-131 deposition estimates were not used to estimate doses. Read the entire page →
From page 185... ... At any rate, the uncertainty in overall deposition estimates for 1954 and 1956 is probably still no worse than a factor of 2-3, comparable to that for NTS deposition in these counties. T-131 milk concentrations for 1954, 1956, 1957 and 1958: The milk concentrations for each county for 1958 were estimated from the 1961 milk concentrations based on the relative deposition in 1958 versus 1962. Read the entire page →
From page 186... ... Dose Calculation: The doses were calculated from the milk concentrations using average milk to dose conversions for each age group for each county inferred from the NTS doses (see Table 7~. The NTS dose per unit annual milk concentration for infants and children vary from year to year (Table 7) Read the entire page →
From page 187... ... Since the dose estimates given here are essentially ratios of the measured milk concentrations of fresh farm milk when cows are on pasture, they were compared with NTS estimated doses for milk from a backyard cow. These doses are similar to those for fresh milk consumed on the farm. Read the entire page →
From page 188... ... it is interesting to note also that on the basis of the observed milk data from Hanford, the doses to the population around Hanford from site releases were a significant fraction of those from fallout in these same years. The dose estimates in Table 7 may be compared to the population-weighted estimate for the 50-60 degree latitude band of the Northern Hemisphere estimated by UNSCEAR2 of T.6 mSv from all weapons fallout. Read the entire page →
From page 189... ... Infants exposed to global fallout would of course not have been exposed during the major releases from Hanford. Read the entire page →
From page 190... ... ESTIMATED FISSION YIELD* Review of the HTDS Draft Final Report Month MT Month MT Nov-52 0.9 Feb-58 1.4 Mar-58 0.4 Mar-54 8.7 Apr-58 0.0 Apr-54 3.6 May-58 1.2 May-54 5.3 Jun-58 5.7 Jun-54 0.0 Ju1-58 5.8 Ju1-54 0.1 Aug-58 4.3 1954 Total 18 Sep-58 1.1 Oct-58 5.8 May-56 3.7 Nov-58 0.0 Jun-56 0.9 1958 26 Ju1-56 6.5 Aug-56 0.5 Sep-61 3.0 Sep-56 0.6 Oct-61 6.0 Oct-56 0.0 Nov-61 11.0 Nov-56 0.0 Dec-61 0.0 Dec-56 0.4 1961 Total 20 1956 Total 13 May-62 2.0 Sep-57 0.4 Jun-62 3.0 Oct-57 2.3 Ju1-62 8.0 Nov-57 0.6 Aug-62 8.0 1957 Total 3 Sep-62 9.0 Oct-62 20.0 Nov-62 13.0 Dec-62 11.0 1962 Total 74 * Read the entire page →
From page 191... ... 191 Ringold Riverview Benton Eltopia Mesa mean J 1961 28 <50 <50 ND ND <50 F 17 <50 <50 ND ND O M <50 <50 <50 ND ND 17 A 33 43 <50 ND ND 27 M 42 37 25 ND ND 33 J 52 30 21 ND ND 36 J <50 ND <50 ND ND <50 A <50 <50 <50 ND ND <50 S 47 58 <50 ND ND 40 O 357 67 120 ND ND 180 N 34 98 312 ND ND 150 D 16 9 13 ND ND 17 Annual 57 37 48 ND ND 48 Average Estimated 23 15 19 19 Hanford Contribution J 1962 5 3 2 ND ND F M A M A S o N D 3 4 6 2 2 1 2 30 4 29 12 109 76 344 277 3 12 8 10 2 23 14 58 38 32 11 23 52 43 31 23 2 4 5 17 72 17 113 177 283 31 6 12 261 10 3 16 12 62 90 190 71 Annual 75 16 16 41 45 39 Average Estimated 15 3 3 8 9 Hanford Contribution Read the entire page →
From page 192... ... ) 1958 1961 1962 Site Precip Sr-89 Precip Sr-89 Precip Sr-89 New York 85 1.3 28 2.4 78 2.0 Pittsburgh 77 1.3 25 1.6 63 2.1 Chicago 60 1.3 54 >1 42 2.0 Vermilion, SD 33 2.5 14 5.7 57 2.2 Salt Lake City 18 2.9 12 5.4 20 3.7 Medford, OR ND 24 0.9 50 1.9 Richmond, CA 18 2.1 17 2.0 51 2.0 Seattle 43 2.5 20 2.5 59 2.5 * Read the entire page →
From page 193... ... Adams, Benton, Month Franklin Counties Walla Walla Stevens County County Seattle 1952 Nov-52 0.8 1.1 1.8 4.2 1954 Mar-54 2.0 2.8 2.6 5.4 Apr-54 0.8 3.4 2.3 6.9 May-54 1.0 1.7 3.5 4.5 Jun-54 1.1 3.0 3.3 4.6 Ju1-54 3.0 3.3 5.0 10 Total 8 14 17 31 1956 May-56 2.1 6.3 2.7 1.7 Jun-56 2.3 2.4 3.3 7.1 Ju1-56 0.7 0.3 2.0 0.2 Aug-56 0.9 3.8 3.3 2.4 Sep-56 0.4 0.3 0.4 5.6 Oct-56 2.6 5.4 4.9 10.4 Nov-56 0.6 1.7 0.8 4.1 Dec-56 1.5 4.9 2.5 6.8 Total 11 25 20 38 1957 Sep-57 0.4 4.0 2.0 4.7 Oct-57 1.3 4.0 4.0 9.2 Nov-57 2.0 5.3 7.0 12 Total 4 13 13 26 1958 Feb-58 4.8 5.0 9.0 14.3 Mar-58 2.0 4.3 3.2 6.6 Apr-58 2.8 9.1 7.1 3.7 May-58 1.7 5.5 1.6 2.3 Jun-58 1.2 2.5 3.5 2.1 Ju1-58 0.3 0.0 3.7 0 Aug-58 0.2 0.0 0.6 1.1 Sep-58 0.3 1.6 2.0 3.7 Oct-58 0.6 1.3 2.5 7.9 193 Read the entire page →
From page 194... ... Ratio of Gummed-Film Gamma Dose Estimates Site 1954/58 1956/58 Boise, ID 0.3 0.5 Billings, MT 0.3 0.7 Salt Lake City 0.4 0.5 Grand Junction, CO 0.5 0.6 Seattle,WA 0.3 0.4 Medford, OR 0.1 0.4 San Francisco, CA 0.2 0.4 Yield ratio 0.7 0 4 Yield from surface shots: 100% in 1954, 75% in 1956, 67% in 1958. Read the entire page →
From page 195... ... Walla Walla I-131 Milk Infant t Childt Teent Adult Deposition nCi-d/L mSv mSv mSv mSv ncilm2 G 1954 36 24 5 2.9 1.0 0.38 L 1956 36 24 5 2.9 1.0 0.38 O 1957 30 18 4 2.2 0.72 0.29 B 1958 90 53 12 6.4 2.1 0.84 A 1961 33 22 5 2.6 0.88 0.35 L * Read the entire page →
From page 196... ... Review of the HTDS Draft Final Report Stevens I-131 Milk Infant t Childt Teent Adult Deposition nCi-d/L mSv mSv mSv mSv ncilm2 G 1954 60 45 7 4.9 1.8 0.58 L 1956 60 45 7 4.9 1.8 0.58 O 1957 30 20 3 2.2 0.8 0.26 B 1958 150 90 14 9.9 3.6 1.2 A 1961 45 30 5 3.3 1.2 0.39 L * Read the entire page →
From page 197... ... from Nevada Weapons Testing Based on Gummed-film Monitoring Data, Health Physics 59~5) Read the entire page →

From page 176...

... APPENDIX C ESTIMATED THYROID DOSES FROM "GLOBAL" WEAPONS TEST FALLOUT IN AREAS DOWNWIND FROM HANFORD Report prepared for the NAS/NRC Board on Radiation Effects Research Harold L Beck Formerly, Director, Environmental Science Division USDOE Environmental Measurements Laboratory April I, 1999 176

Appendix C: Estimated Thyroid Doses From Pages 176-197

Appendix C: Estimated Thyroid Doses From
Pages 176-197