Radiation Protection Factors of Selected Light Vehicles against Residual Radiation

摘要

This report summarizes calculations made to determine the factors needed to correct the in-vehicle Radiation Detection Identification and Computation Meter (RADIAC) dose readings to the outside environment. The methodology used is a modified VCS approach and is fully described. The VCS calculation produces a gamma protection factor for a 2 day old fallout spectrum lying on the ground surface exterior of the vehicle. This protection factor can be used to correct the in-vehicle RADAIC dose level readings to produce the exterior free-field dose level. The results present not only the correction factors but also several spectra comparisons for in-vehicle and exterior free-field. The calculated correction values are shown below. Keywords: Light utility vehicles; 1.25 Ton payload vehicle; HMMWV; 1.25 Ton, 4X4, Model M1008; Vehicle code system; VCS; 1.35 Ton 4X4, Model M880; Radiation transport calculations; RADIAC; Gamma protection factor; Gamma spectra. (kt)