Cargo units and '$X amount of goods' make sense! Savage Worlds is supposed to be "fast and furious" after all. ^.^

I concur re: preventatives, but one way you could cushion things is that a dose of Rad-X contains enough nano-whatevers to heal X amount of radiation, so you *could* take it ahead of time, or within a short enough time of incurring radiation, once you realize you're taking radiation damage. If you took less than X, then the remaining amount stays in your system for the next hour or so.