VI of evaluation of meters which were used to determine the actual radiation hazard to aircraft which penetrated a nuclear cloud. It was hoped, project personnel would be able to define exactly what dangers existed fer crewmen working around a contaminated aircraft. Colonel Ernest A. Pinson and Captain Paul M. Crumley, project officers from the Research Directorate, planned to survey the gamma intensities from various parts of the aircraft and then compare the. results with a survey of the contact intensities of beta plus gamma rays fFom mixed fission products distribution on the same section, meters, From these studies they could determine accuracy of existing Their instruments measured total dose radiation, depth, and rate! Aircraft usually were onthe runway at Indian Springs Air Force Base within 15 minutes of the time theypenetrated the cloud and the crew immediately began two hours intensive examination on the airplane and continued surveys for 2h hours, First inspections were accomplished with various ionization chamber-type meters with readings taken from one-fourth inch from the plane's surface, from three inches, one foot and, finally three feet. After meter inspection, personnel went over the same area with photographic film, film packets, which came into direct contact with the areas that contained particles of radioactive naterial, the packets being held in place by masking tape for the required exposure time, To record the general intensity of the area, the localized "hot spots" caused overexposure areas on the film, A second film exposure of much shorter duration followed for more accurate recordings of these spots, Through these methods the Research Directorate crews obtained successful radiation dose readings. 1h In other tests, swatches of glove material, with film 127 APWAZHC SWEH-2-003), , A" oe WHA