estrictcd mr tke atomic 6 Its trans— App endix The attached curves are those from which the numbcrs in the tables were computed, For any given case one first determines which of the family of curves to usc from the relation =xy 10 4 where "h "is the cloud height in miles and "a" is the mean particle diameter~in microns. If one then chooses a wind velocity "V" in mph and a distance "Dt in miles from zero one can determine the integratcd dose "I" in roentgens from the curve labeled by the parameter "n", The following points arc immediately evident from the curve: (1) For fixed "V" and "D' a unique value of "n" gives the heaviest dose at D. ‘Thus for a fixed mean particle diameter "a" the dose will be decreased both by igher and lower cloud heights. Physically the higher cloud leads to greater dilution and the lower leads to greatcr deposition, near the crater, (2) For fixed "h_" and "a", two regions of wind velocity "V" exist such that the dosc at "D" is below the maximum possible at that distance. For example, :f, at D= 50 miles and n=, one wants the integratcd dose to be less than 5 roentgens, the condition vill be mct by V 218 moh or V& 3.4 mph The condition n = ) corresponds to a cloud hcight of 2 miles end a mean particle size of about 35 microns. Distribution: Cpy 1A thru 6A - Felt (w/1 att. cach) Cpy 7A — J-Division Cpy 8A - J-Scavence Cpy 9A - Mail & Records