Abstract This paper describes the use of an electronic 3D model of a spacecraft with four crewmembers modeled by anthropomorphic phantoms sitting in chairs to calculate doses of space radiation in representative points of the critical organs of a crewmember’s body. At the same time, the shielding functions for the selected representative points of the skin, haematopoietic system, and central nervous system are obtained by the ray-tracing method. In order to describe the characteristics of ionizing space rays, the depth-dose curves for galactic cosmic rays and terrestrial radiation belts in a near-Earth orbit with an altitude of 450 km and inclination of 51.6° are used. The calculation showed that the requirements for radiation safety of the crew for the selected model of the spacecraft and the specified orbit during a minimum and maximum of solar activity are met. Electronic 3D models make it possible to perform the necessary evaluation of dose rates at the design stage taking into account the spacecraft configuration optimization under the existing constraints on the total mass.
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