akaggie05 said:
Why the hell not? Wouldn't be nuking a city and killing tens or hundreds of thousands of people. Would be using them as a large scalpel to penetrate down and destroy their uranium stockpile. Big smoking hole in the ground in the middle of nowhere, minimal civilian casualties, and stockpile gone. Anyone who screams escalation in that scenario is looking for a reason to get offended.
A nuclear explosion isn't going to penetrate deep into the earth. Most of the force is going to take the path of least resistances which up and radiating outwards through the air. It isn't going to be directed into a single point downwards. And when it does detonate, the energy that does focus downward is going to be spread out in a larger area. Most of the really big craters of nuclear test are the result of underground testing, not surface detonations.
What we do have are bunker busters like the GBU-57 MOP. It's able to penetrate into the ground not because of it's explosive power, but because it's so damn heavy and made of reinforced steel (almost 30k lbs). We drop it from really high up and gravity does the rest. Then once it's embedded into the ground it detonates.
There are several issues with it though. It can go about 60ft down through rock and concrete that has a compressive strength of 5,000psi. Some of Iran's bunkers are under rock and/or concrete that well exceeds 5,000psi. In some cases it's as high as 30,000psi.
That also assumes the material it is going through remains consistent and is fairly homogeneous. Underground rock formations, changes in concrete layout, etc can cause the bomb to veer off course. and travel further sideways than down. Try throwing a stick, staff, or toypedo pool toy into the water. Does it always go straight down or can it shoot sideways sometimes?
So options are to:
- hit a small ventilation shaft ala Star Wars and the Death star
- Destroy the entrance or exits to a cave/facility
- Land multiple bunker busters successively in the same place
That can be tough when you are dropping them from so high up and can only carry 1-2 per bomber.