TABLE 3.5 COMPUTATION OF DOSE RATE AND ACCUMULATED DOSE 3 FEET ABOVE A HYPOTHETICAL PLANE CATCHING THE FALLOUT FROM SHOT 5 Column: 1. Local time of reading (track time). Column: 6. 6 computed instantaneous local dose rate at 3 2. Hours since Shot 5 (Col 1 minus 0600/5/May). feet elevation in r/hr (8.2 x 107) (Col 4) (Col 5) Appen- 3. Hours since fallout arrival (derived from NRDL arrival data and based upon the corrected track). 4. Depth of mixing Z in meters. dix C. 7. Decay coefficient to H + 12 hours (NRDL decay data). derived from an average of the local wa readings (Figure 3.1) after these were first reduced to mr/hr at H + 12 (Col 7) (Col 6) in r/hr. 5. $, computed dose rate in situ at time t; this was 8¢ (Figure 2.1 - Figure 2.4), then correcting for apparent instrument contamination, then multiplying by the factor 1.5 (Appendix B) so as to correct for use of the instruments when submerged in a 4 pi sourceof fall- In mr/hr. 64. computed local dose rate at 3 feet elevation 9. @, computed local dose rate at 3 feet elevation at H+ 1 (22.7) (Col 8) in r/hr. roughly by applying the radium calibration curves out material. 8. 10. 11. Fallout time of arrival, hours after Shot 5. Computational factor, the accumulated dose computed on the basis of l r/hr at time H +1. (Based upon decay data from NRDL). 12. Computed dose at 3 feet elevation accumulated between fallout arrival and H + 50 = (Col 11) (Col 9). Note: The numbers in all columns should be roundedoff at two figures. 1 2 3 4 Track — Hours Hours Depth And Date H Hour FallOut Mixing (Meters) Time Since Since of 5 - pt In Situ (mr/hr) 6 Of @3' R/hr 7 Decay Coefficient to Hel2 8 9 3 Q @ 4, R/nr @ 4, / W/hr 10 11 12 Fallout accumu- Accumulated Hours: Since Fallout to H+50 Roentgen Time H Hour lated Dose Factor Dose from May 5 1954 2300 2315 2330 350 24,00 17:0 17:15 17:30 17: 50 18:00 15:00 15:15 15:30 15:50 16.00 35.2 35.8 36.4 37.2 37.6 1.7 24.0 60.0 91.2 83.4 3.38 7.05 17.90 27.80 25.70 1.35 1.37 1.39 1.41 1.42 4.56 9.66 24.88 39.20 36.49 103.7 219.0 566.0 890.0 806.0 2.0 2.0 2.0 2.0 2.0 1.86 1.86 1.86 1.86 1.86 193.00 407.00 1,052.00 1,652.00 1,500.00