That's not much of a risk, if you haven't ground-tested the engine. Nuclear fuel...

DennisP on May 26, 2022 | parent | context | favorite | on: DARPA moving forward with nuclear thermal engine d...

That's not much of a risk, if you haven't ground-tested the engine. Nuclear fuel is barely radioactive before fission. It's the waste products of fission that you have to watch out for.