After the global cessation of nuclear tests, there is a lack of experimental methods and conditions for evaluating the residual nuclear radiation protection performance of vehicles. To address this, this paper proposes a vehicle residual nuclear radiation protection performance evaluation method based on an equivalent model. Using a certain type of vehicle as the research sample, the theoretical model for calculating the internal dose rate of the vehicle is first applied to determine the equivalent surface source radius of an infinitely large residual nuclear radiation field. A Monte Carlo simulation model of the vehicle is then established to obtain the residual nuclear radiation protection factors for each surface of the vehicle’s outer shell, which forms the basis for designing an equivalent model for residual nuclear radiation protection performance testing. Finally, a point radiation source is used to simulate the residual nuclear radiation field and conduct experimental testing on the equivalent model, in order to obtain the residual nuclear radiation protection factors. The experimental results show that this method can measure the residual nuclear radiation protection factor of vehicles in a laboratory environment, and provide technical support for the evaluation of the residual nuclear radiation protection performance of any type of vehicle.
Wang et al. (Wed,) studied this question.