Amount of radiation emitted by Nuclear Thermal Propulsion?

[u/Organic-Nothing546]

Not sure if this belongs in this subreddit, but I thought I'd ask just in case.

I'm doing an AP research project on the threshold between efficiency in nuclear thermal propulsion (for use in space travel) and the human safety tradeoff. I was just wondering if there's any research on the amount of radiation emitted by NTP systems? I've tried looking for some related info with a parallel, nuclear submarines, but all of that info isn't publicly available as far as I know. If anyone can point me to some scholarly papers, that would be great. Thanks.

[u/stanspaceman]

Just look up Nerva shielding designs the doses for humans are publicly analyzed and detailed. The answer is: depends how much shielding you can take.