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Expanding knowledge of the complexities of the space radiation environment and its interactions with matter, coupled with greater burdens associated with budgetary and time constraints, have given impetus to the need for application of more sophisticated analyses in more abbreviated time spans. Recent work at NASA‐LaRC in this area has resulted in development of high efficiency algorithms coupled with high speed computers and visualization hardware and software to analyze space radiation effects and shielding methodologies for advanced missions. Special interfacing with CAD solid models and 3‐D immersive visualization equipment plays a major role in this endeavor. Recent applications have included analyses for EVA in a CAD‐modeled STS space suit, for vector flux exposure in an ISS habitation module, and for preliminary exposure predictions within a conceptual habitation module at an Earth‐Moon libration point. Execution times for these heretofore rather lengthy analyses have been reduced from matters of h...

The radiation environments at Earth‐Lunar L1 are vastly different than what has been encountered before by humans, thus analysis of the predicted dose rates will need to be examined if the Gateway scenario is to be properly evaluated. The environments to be considered will be those of deep space. Recently a CAD model of the three vehicles of the Gateway concept was developed to define the shielding properties inherent to the vehicles. The models consist of approximately 50–100 components that describe the directional shielding provided for the astronaut. The goals were to provide simple models so that near real‐time analysis can be performed while the solid angles subtended by the modeled elements were compatible with those of the true vehicle models. The analysis will consist of determining the variable dose though out each of the Gateway vehicles.