NV/HEG Mtg.-Sept. 26-27, 1968 Page 2 PHS program to study the 1-131 radionuclide deposition that might result from the testing of nuclear devices by the U.S. Atomic Energy Commission. Starting in 1963, the PHS has collected data from three different types of experiments in order to develop human I-131 exposure dose prediction models covering a variety of field sources of radioiodine under a variety of meteorological conditions. a. These types of experiments are; The "AD HOC" Experiment, covering an unexpected venting (for example, PIKE, PINSTRIPE), b. A Planned Field Experiment, under controlled conditions, in connection with the conduct of a planned PLOWSHARE cratering experiment for instance c. (PALANQUIN, CABRIOLET, BUGGY, etc.), and Synthetic I-13] Release Experiments over the forage at the PHS experimental farm at the NTS. The Public Health Service efforts are directed toward an early warning prediction device that will predict an 1-131 problem downwind in the off-site population whenever any source of radioiodine is generated at the Nevada Test Site or anv other testing location. Peak gamma exposure rates at ground level are determined by monitors with portable survey instruments. at ground level. ewe tration for I-13l. In addition, air samples are collected These air samples lead to an integrated air concenIt has been possible to establish some correlation between both the above measurements and the I-131 peak inbmi Ik that will occur there later. Forage samples are taken to determine the number of f fete 7 “OCE 7k SNL 74 98 A Poe NOM