’ CHAPTER 7 SUMMARY AND RECCMMENDATIONS — 4 7.1 SUMMARY OF RAMTOTOOTCAL ANAINSIS ‘The radiological data provided by Operation IVY reveals the following information: a. The direction and speed of transport of the IVY ' atomic clouds appears to be reasonably typical of . conditions during November. mame — ; - - b. The greatest radioactivity measured on a single gummed paper from the monitoring network was 3.6 x 10° d/m at Iwo Jima five to.six days after the MIKE burst. The highest depogition in the Hawaiian Islands was about 6 x 10° d/m and the highest deposition in the United States and Canada was 4 q 3 - , OO , | 1x10 d/m. While there have,;been higher values of radioactivity than 3.6 x 10° d/m reported from continental tests they have always occurred within two days after the explosion. --. @ There appears to be little correlation between the fallout collected on gummed paper and the air concentration msasured by the air filters. The - latter measurements do not lend themselves to a satisfactory meteorological analysis. Different but reasonable conditions may well bring about greater surface radioactivity than was observed during this operation. Ths following estimates of potential radioactivity . are based on possible msteorological conditions and on the assumption that the amount of radioactive debris available for surface deposition is directly proportional to the yield. -5% - _ . a co A dinisstieacs aia tintate abadl 7.2 ° SUMMARY OF POTENTTAL MAXIMA FALLOUT ESTIMATES