410801 UASG 81-20 Castle-Bravo Air Concentration and Deposition Patterns from a 3-D Particlein-Cell Cace by Kendall R. Peterson May 18, 1931 ABSTRACT The MATHEW-ADPIC code suite has been extensively modified to give the total external dose from the detonation of the Castle-Bravo nuclear test at Bikini Atoll until evacuation of the inhabitants of neardy atolls. The advantages of this code suite is that it uses all the observed winds (in a mass-conservation sense) at and after the detonation to provide dose rates and doses due to passage of the debris clouc anc to the time-iritegrated deposition up to evacuation time. Previous assessments have given the fallout pattern (deposition only) at time H+l hours. The present code formulation gives excellent agreement with the estimated total external dose (based on measurements) to people on Rongelap and Ailinginae atolls. BEST COPY AVAILABLE “work Deriormed under the auspices of the U. S. Department of Energy under Contract No. W-7405-ENG-48.