AQSORS

UASG 81-20

Castle-Bravo Air Concentration and Deposition
Patterns from a 3-D Partielin-Cell Coce

by
Kendall R. Peterson

May 18, 1931
ABSTRACT

The MATHEW-ADPIC eode 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 sanse) at and
after the detonation to provide dose rates and doses due to passage of the debris
cloud anc to the time-integrated deposition up to evacuation time.

Previous

assessments have given the fallout pattern (deposition only} at time H+1 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

*ttorx performed under the auspices of the U. §. Dedartment of Energy under
Contract No. W-7405-ENG-48.

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