The nuke would go off at least couple of miles under the seabed, next to the pipeline. The blast would crush the pipeline shut and fuse the entire area, sealing it off. Done right, no blast effects or radiation would reach the water.
At tleast that's how the Russians did it.
So, all we need to do is dig a tunnel a couple of miles under the seabed, big enough to put a nuke in and get it properly positioned. How long will it take to drill the tunnel? Who is going to handle and place the nuke, oil-workers ?
How long will it take the government to modify a nuke that they can put under the water at such high pressures? How long will it take the administration to authorize such a procedure?
And if you end up fracturing the seabed even more than it already is?
You’ve seen videos of underground tests out in Nevada, right? Amazing how the earth ripples out from the epicenter much the same way water does when you toss in a rock. Sure it could be possible to fuse the area near the epicenter, but what about further out from there?
I read somewhere, the they believe that the drilling mud had fracture some of the “fragile” rock. Drilling mud!