It boils off a 1 mile deep water column? And you don't need a core catcher when you are already 1 mile deep in bedrock. It just goes to the bottom of the hole.
So this thing is just boiling off water from the mile deep water column, and nobody things "hey maybe we could add some more water"? How does a shaft "explode"? What is generating the explosive force?
Yes?
> And you don't need a core catcher when you are already 1 mile deep in bedrock.
Yes, you do. Because if the shaft explodes or gets blocked near the top, the fission products can travel up the water column.