How does one test the strength of a nuclear waste shipping container, exactly? It’s simple: crash a rocket truck into a wall at 84 miles per hour. That or drive a train into it.
At least, that’s how the Department of Energy did it back in ‘77 and ‘78, as this test video turned up by BangShift notes:
The DOE also held the container over a pool of burning jet fuel to test heat resistance, which the container soundly survived.