Presumably, they also have to keep the plasma cool, I am guessing some of that 90-tonne wait could be attributed to cooling gels/liquids of some kind to keep it

Presumably, they also have to keep the plasma cool, I am guessing some of that 90-tonne wait could be attributed to cooling gels/liquids of some kind to keep it stable for transport. Admittedly, I don't know how they would even transport this over long distances like that.