Arguably a fusion reactor has a much higher chance of harming the population around as a breach in containment could release highly radioactive gases. > But ev

Arguably a fusion reactor has a much higher chance of harming the population around as a breach in containment could release highly radioactive gases. > But even with the low hanging fruit type of fusion with tritium & deuterium, you don’t get these long lived transuranic isotopes. You don't get these in a good fission cycle either. > Also, fusion has some important very long term applications in human spaceflight (& interstellar travel). Yes but and fission has a lot of applications in human spaceflight too. And not some theoretical interstellar travel, but rather in things that are actually useful and that we need now. Mars surface power most importantly. Nuclear Electric Propulsion second most importantly. Its all fine to dream of interstellar travel, but by any logical view to world, Mars is a closer term thing then interstellar space travel. Also, if we just want to send interstellar probes. Lasers driven by fission are much more likely to be a good solution in the next 100 years.