Speaker
Description
For decades, it has now been established that space radiations have a direct impact on astronauts’ health (Apollo missions, astronauts on ISS, …). Furthermore, with the renewed interest in space exploration (lunar bases, travel to the Moon and Mars, …), the radiation protection is a key parameter to build an efficient housing against cosmic rays and solar flares. TRAD has developed and integrated a new module of radiation protection on FASTRAD® software v5.0, already widely renowned for dose and internal charging calculations on 3D realistic payloads and electronic components.
Based on Forward Monte-Carlo calculation method (Geant4), the particles are tracked from space to human tissues and organs. This method, integrated into FASTRAD®, includes both electromagnetic and hadronic physics (neutron, heavy ions). The new module also includes the main radiological quantities defined by the ICRU and ICRP (Publication n°74 and n°123): Absorbed dose (D), Dose equivalent (H', H*, Hp), Effective dose (E) and Effective Dose Equivalent. Moreover, it’s possible to compute these quantities at astronaut’s level or at structure’s level, such as an entire habitat/spacecraft, with surface and volume mappings.
We will present computations of some radiological quantities for different scenarios such as Transfert habitat or Moon habitat with a dome. First, OMERE freeware, also developed by TRAD, will be used to define the radiation space environment. Then, FASTRAD® will be used compute the Effective Dose Equivalent, the fluence, and some other quantities to study the contribution of the different ions, compare the dose from Galactic Cosmic Rays and the one from solar flares, and to illustrate the impact of a shielding on a given mission and on astronauts’ health.
