CIVIL DEFENSE MONITORING TECHNIQUES

Operations were conducted to obtain information by aerial, automotive, and ground monitoring surveys for the purpose of evaluating and correlating the data and methods. Studies were made to determine the attenuation factors of automobiles and airplanes and the time-lag factors of various instruments used in civil defense for the detection of radiation contamination. The results of the aerial survey were evaluated, and correlation factors were developed which permit the interpolation of aerial readings as ground-level radiation intensities within a range of =50 per cent. Surveys conducted by automobile permitted the development of a set of correlation factors which can be used to compute dose-in-air readings for rapid automotive surveys. Radiation attenuation factors were developed for various aircraft and automotive vehicles. Time-lag factors (i.e., response time) were also developed for some of the civil defense instruments. The feasibility and practicability of automotive and aerial survey as a radiological monitoring tool was established. The practicability of the use of the SU-10A (civilian version of the military AN/PDR-T1B), which has been used for civil defense purposes as an interim aerial survey instrument, was established. (Author) Rept. on Operation Teapot, Nevada Test Site, Feb-May 55.