Oo QO to Ae b cy 3 oo Wa cr n oO 3 oO m a 3wo D uu n Oo 5 t > Es} 0Q @ ke |- oct Ee rs te SS t- 4 INTRODUCTION comparisons | or to ‘draw contin asions. eenly into these sudjects. 1.2 BACKGROUND (U) A comprehensive report summarizing the data from i measurements (O to 1 minute after detonation) made at nucle has been needed for some time. The initial gamma dose measu: here were made by the following DOD agencies: the US Army a w (LASL), the National Bureau of Standards (NES), and other agencies ry Gamma. data which were compiled by the Los Alamos Scientific Labora‘: aD § Dee and Develorcrent weeee Laboratory (USANDL), the US Army Signal Research (USASRDL), and the Radiological Safety (Rad Safe) Group at she tes XO oR w Wig D eh vi fully ct now Ve ae) id f Cu) ‘S presented whers DOD data are not availabie and where the cava of suc agencies are needed for comparison. Information concerning the detonst* for which gamma dose data are available is presented in Taole 1.1. Sie yields quoted are based on current information and may be suoject to minor Changes. mn) te ment of gamma : 4 ration Turblse-Snavee: Rad Safe had performed gamma-dose measurements on a& oneOperation Sandstone in 1948. Gamma dose was measured duricg Greenhouse by the NBS and during Operations Ranger, Buster-Janzle, ans Ivy almost exclusively by LASL. The US Army Signal Corss A dose measurements at the underground and surface shots during dangle; however, most of the detectors remained in fallou Yr 50 hours. (U) Film has been used at every operation since Sand gamma dose. To provide energy independence and electroni conl various film holders have been used -- the moss common bei LASL holders, In addition, silver-phosphate-~-glass blocks chemical-dosimeter systems, and cobalt-glass plates have bee number of the operations with varying degrees of success. Bi type gamma-dosimeters were tested during Operation Greenhouse. 1? 2