Taole |. Comparison of gross fission product total external cases Tor computer calculations S$ trauss+? Evacuation Time Atoll (hours) Rongel2o (northern part) Rongelao (soutneastern part) Ailinginae (Sifo [stand) Rongertk (southeastern part) Utirik vs. estimates Present Calculations (racs) by Previous Estimates Dunninat9! (roentgens) Ref. 51 1300 2000 (6] 51 110 173 {5] 53 24 <100 {5} 30 340 78 (5] ~v10 (5] 78 0.33 and With the modified MATHEW-ADPIC cade suite, it is possible to calculate the instantaneous immersion dose rate from gross fission products as a function of time. This can be done for any time inteval. Figures ?a to 2f show surface immersion dose rate contours for every three hours from one hour after Bravo cloud stabilization time to H+16 hours. Note that after an easterly traverse, most of the cebris reaches the trade wind level; the contour pattern moves south and finally toward the southwest. Indivicual Nuclices Calculations “ere mace of instantaneous and time-integrated concentrations at 2 m above the surface for the several atolls affected by Castle-Bravo. nuclides eonsid2zred were Te-129, I[-L31l, [-138, Cs-137, and Eu-155. The These calculations agree well with odservations at Rongelap and Ailinginae atolls, but are too high at Rongerik and too low at Utirtk atoll. The surface concentrations for Dongalac. Soth the northern and southeastern darts of the atoll, and for Ailiginue Atoll are presented in Figures 3a to 5e. The time of arrival of the first Bravo debris is in agreement with reports made by the inhabitants.