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Russian scientists measured secondary radiation at International Space Station

An international team under the guidance of K.O. Inozemtsev from the National Research Nuclear University «MEPhI» has estimated the level of secondary radiation at the International Space Station and how large is its contribution to the radiation load of spacemen on-orbit. This work might have substantial importance for the understanding of the influence of space environment on people during the flights to the Moon and Mars. The respective article has been published in the Radiation Protection Dosimetry.
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It has been turned out that the secondary radiation ranges from 16 up to 34 percent of total radiation level on board. It should be noted that although an average level of radiation on board of ISS is relatively high if compared to those on the Earth but it is still rather nonhazardous for the human. For example, NASA manifests the limiting radiation dose for its astronauts to be 500 millisieverts in a year which corresponds to approximately 500 days at ISS. This means that it is almost impossible to gather the dose above the limit at ISS as a year consists of only 365 days.

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