Numerous long-duration spacecraft designs incorporate water storage in the outer structure, or a high-radiation shelter within a water storage structure, for ju

Numerous long-duration spacecraft designs incorporate water storage in the outer structure, or a high-radiation shelter within a water storage structure, for just this purpose. Water attenuates radiation quite rapidly. And has other uses. <https://news.ycombinator.com/item?id=41646990 https://news.ycombinator.com/item?id=41646990> <https://isoe-network.net/publications/pub-proceedings/symposia/north-american-tc-symposia/fort-lauderdale-usa-january-2011/slides-14/session-iv-1/1756-ritter2011-ppt/file.html https://isoe-network.net/publications/pub-proceedings/sympos...>