Boil-off can be prevented by loosely wrapping in 50~100 layers of aluminized mylar ("space blanket"), adding some solar panels and heat rejection panels, and a 2 or 3 stage refrigerator to keep the contents cold enough to not trigger the boil-off safety overpressure valve.
If you're clever with the orientation or possibly with a movable sun shade, you might even get by with just using space as a heat dump, by insulating against the earth and the sun and exposing to empty space to radiate the leakage heat away without a refrigerator.
I think they have enough experience with orbital electromechanical design to make this not a problem with much suffering.
If you're clever with the orientation or possibly with a movable sun shade, you might even get by with just using space as a heat dump, by insulating against the earth and the sun and exposing to empty space to radiate the leakage heat away without a refrigerator.
I think they have enough experience with orbital electromechanical design to make this not a problem with much suffering.