Re: Spacecraft,
I doubt FF would be used as a power source to get on orbit. The vehicle mass would be excessive and other than superheating material for mass ejection there are currently no known propulsion systems that could use electricity and generate sufficient thrust to get a manned space vehicle off the ground. (That don’t produce excessive amounts of ionising radiation in the process).
If an FF was used as a power source on a space vehicle I would see it being used more for deep space, rather than on orbit. Shielding is less of an issue of mass in this situation as the crew will need shielding anyway.
Again on a base, on the moon for example, I would have thought burying it would be more beneficial than taking shielding with you.
