But since you're not starting them up before you're in orbit, if the launch would fail it wouldn't be particularly radioactive. Sure, uranium is a toxic heavy m

But since you're not starting them up before you're in orbit, if the launch would fail it wouldn't be particularly radioactive. Sure, uranium is a toxic heavy metal, like many other heavy elements like lead, but not very radioactive. Also, since they're using 20% enriched fuel and not 90%+ like Peewee/Kiwi, I guess the fuel design is somewhat different although there certainly are similarities.