If you let fly with a Hiroshima sized bomb (what this is) you can be pretty assured that the chain reaction will be about the same as if you let fly with a megaton sized warhead.
I could see the argument about reducing barrier to use if this were a 1kt bunker buster but this nuke is still big enough to be treated the same as any other nuke in the fleet.
I could see the argument about reducing barrier to use if this were a 1kt bunker buster but this nuke is still big enough to be treated the same as any other nuke in the fleet.