. em edtang pen erore EngRinaaaa C 0018933 The gas samples were analyzed for radioactive krypton and the cloud and fallout samples were each analyzed for sr”, cst3? and several other nuclides to give information on fractionation. Fall rate and size distribution measure-~ ments were made’ on the particle samples from the land surface shot. The combined analytical data were used to estimate the distribution of sr?? and cst? between the local and long-range fallout. There are no results to be reported on the spatial distribution of radioactivity in the clouds since this part of the project was dependent on the rocket samples. The results indicate, if the layers sampled were representative of the total clouds that for water shots, around one-fourth of the sr? and one-third of the Cst?? formed will be dispersed over distances greater than 4,000 miles. Cor- responding figures for a coral land surface are one-fifth for Sr?? and one-half for cst37 Radiomelide fractionation was pronounced, i.e., the radiomuclide composi- tion varied from layer to layer, in the land surface shote The local fallout was depleted in both sr?° and cst3? and the upper portions of the clouds were enriched. Fractionation was much less for the water shot. It is reco-mended that a similar project, with a more detailed analysis of radionuclide Gistributions be included as part of the progrem if future weapons tests are scheculed. Such a project could provide more valuable information than the HARDTACK data. : 3 RE-S TRNCE BDha TiCEipeieycnetOletog