The gov't is not telling us everything.....
Imagine the noise and flash from 200 million amps if there was a short circuit!
I can imagine it would be something like a MOAB detonation.
But that does bring up some interesting tech questions that I had not considered.
Operating this Mass Driver is going to require some new technology in switches and breakers.
I would think that the work that the Navy and their research contractors have done with their railguns would be applicable but even those would be puny in comparison.
I think that the switches for launching something this big might be disposable. Such as close the switch once and throw it away because it destroys itself in the process.