gue true of neutrons. The radiation doses to personnel in armored vehicles can be reduced to militarily acceptable levels by a sufficient thickness cf additional shielding material; the thickness and weight of material required to reduce the radiation doses at the distance of moderate tank damage-to acceptable levels present serious difficulties, because of the reduction of the space in the armored vehicles and the weight added to the vehicles. If complete protection of the crews of armored vekicles from the effects of nuclear weapons is desired, con- sideration may have to be given in the formulation of doctrine governing the operation of armored units, to accepting additional weight in the ics. design of ermored vehicles, to operating with increased dispersion between individual vehicles or units, or to an intermediate solution involving some additional shielding with its accompanying weight increases and increased dispersion to reduce the number of casualties from a single nuclear BEST AVAILABLE COPY epiosin. CRLR - 617 (u) - DUST DENSITY VS. TIME AND DISTANCE IN THE SHOCK WAVE (C). WI-1113, Operation TEAPOT. Malcolm G. Gordon, John F. Stoudt, and Arthur B. Francis, 17 January 1956. CONFIDENTIAL-RESTRICTED DATA, Special Report The preliminary report of this work was published as ITR-1113, and the final report as WT-1113. CRLR - 636 (U) - RADIOCHEMICAL ESTIMATION OF TOTAL ACTIVITY INCLUDED WITHIN DOSE-RATE CONTOURS FOR BRAVO SHOT, OPERATION CASTLE (U). Robert C. Tompkins, 28 March 1956. SECRET-RESTRICTED DATA, Special Report Fadiochemical and field-survey data obtained by the Chemical Corps at Ovreration CASTLE are used in conjunction with fallout-contour areas published by AFSWP to calculate the percentage of the total fission- product activity from Bravo Shot which was contained in fallout within various dose-rate contours. radiochemical analysis of fallout from Bravo Shot leads to the conclusion that 484 of the fission-product activity fell to earth within the H + 1 cose-rate contour (14,700 sq mi) of 100 r/hr in good agreement with other, less precise measurements.