KELLOGs also heen interested in where the cloud stabilizes when (continued) stops moving upward, because the initial distribution in radijcactive debris in the atacsphere has an isportant on how it will come back down to the ground. Soze of you | are alreacy cware of # tentative conclusion that if it goes high it will be sore difficult for it to be scavenced by rain] Ferhaps 4¢ I show thie first slide it will denonstrate the point little more clearly, We have a plot here of height of positionel 0,600 30,000 and 20,000 in feet, versus yield in kilotons ~ for] instance, 5, 10, 15, 20. I have plotted here soze data points, in fhis case, all from the Nevada tests, and they doen't follow any very syate-etie patterny thet in, they don’t S74 follow eaxac line which I have drawn. the trend. ut J think they give a god In a few cases we've also plotted bottoas, ere still in the precess of scaling all photographs to ge accurate and nore points to plot on these curvee, Theae dash lines here I'll mention because they refer to a theoret. calculation of where the centers of clouds wuld go for atmospheric conditions. The first thing we tried to do ane how thia mean curve, if you will, the colored line, change if we exploeded thes under conditions wiich are divferent fraa those in Nevada, Fe'll discusa this wore conditicas and a very high tropopause, And this lovest where we have wintertine conditions which are extremely stable. Dae pa Derarivent of qizts : ft. 3 at ™ ml whe :a mt gts? roberta fd 24