People are looking into that idea of high pressure fuel filling and it does not seem to be possible at the rate needed. And the weight and volume and not possible in such small wings. You can see in my photo, that at least half of the wing in used for technical equipment and there is even a big gap in it.

500 tons at a lot. It does not seem possible at that weight, but the number of gallons stated would give much more weight than that. Also the time stated would be much more that the time the planes are on the ground.

I cannot imagine such wonderful fireproofing would also be in the wings.

I would love to hear from you again after you look into this.