CHAPTER 3 RESULTS 3.1 OPERATION SANDSTOLE (U) Operation Sandstone, conducted at the Pacific Proving Grounis (PPG) during April and May 1948, consisted of three tower shots. A summary of the shot information is presented in Table 3.1 and the meteorological conditions at shot time are given in Table 3.2. (U) The gamma measurements were performed by Rad Safe (Task Group 7.6) with film badges (Reference 21). Six film types covering the range from 0.05 to 22,500 r were packaged in lightproof packs with a 1/32-inch lead eross over the front, and sealed in an aluminum-foil jacket. The film badges were attached to 2x2x3/16-inch angle-iron staxes at distances of UW) a fa oO I 7b less than 1000 yards and to 1x1x3/16-inch angle-iron stakes at distances of greater than 1000 yards. Energy dependence of the film paige was poor, since excessive response to radiation below 300 xe/ was noted. A the film badges remained in the field for 12 to 30 hours after detorati generally in the upwind direction. Residual contamination was estimate: from field survey data to be negligible as compared to the film readin (U) Neutron-flux measurements were made by Los Alamos Group LAJ-3 with threshold detectors (Reference 13). Since no plutonium data were available, the total fast-neutron flux was calculated as described in Chapter é. (U) The ganr+ data and corrections are presented in Tables and 3.5. Figures 3.1, 3.2, and 3.3 show the correctei gemma-dos the-slant-distance-squared as a function of slant distance. 3.2 OPERATION RANGER (U) Operation Ranger, the first operation at the Nevada Test Site (NTS), was conducted during January and February 1951 and consisted of five airdrops. Shot information is summarized in Table 3.6, and meteorological data are presented in Table 3.7. (U) Gamma measurements were obtained with film dosimeters by the Rad Safe group of LASL for all the shots (Reference 22). Three film types covering the range of 0.1 to 3000 r were packaged in a lightporoof paper jacket with a 1/8-inch lead clip placed over each unit, sealed in a plastic 28