CHAPTER 1 OVERVIEW INTRODUCTION Purpose CASTLE was a test series in which six nuclear fusion devices ere detonated at the Atomic Energy Commission's (AEC) Pacific Proving (PPG) at Enewetak and Bikini atolls in the spring of 1954. Ground Tabla@jl lists the detonations. Table 1. Date Assigned Name CASTLE detonations, 1954. . Location |, agnitude 1 March BRAVO Bikini; sandspit off Nam Island 15 MT? 27 March ROMEO Bikini; barge in BRAVO crater 11 MT KOON Bikini; surface of Eneman Island 110 KT UNION Bikini; barge in lagoon off Iroij Island 6.9 MT 5 May YANKEE Bikini; barge in UNION crater 13.5 MT 14 May NECTAR Enewetak; barge in MIKED crater 1.69 MT 7 April 26 April Notes: “One kiloton equals the approximate energy release of the explos on of one thousand tons of TNT; one megaton equals the approximate energy release of the explosion of one million tons of TNT. 10.4 MT, IVY series detonation in 1952. This report documents the participation of Department of Defe se (DOD) personnel who were active in this test series. Its purpose is to bring together the available information about this atmospheric nuclear test series pertinent to the exposure of DOD personnel, both uniformed and civilian employees. The report attempts to explain the reasons tha 25 1 bop