Fun! But presumably you'd be pumping out the heat somehow so the entirety of your power cabling and waste cart system doesn't need to be made of inconel or tun

Fun! But presumably you'd be pumping out the heat somehow so the entirety of your power cabling and waste cart system doesn't need to be made of inconel or tungsten. If half went into the ground somehow you'd need to boil about a tonne of water a second. The entrance to the tunnel sounds like it'd be fun with high pressure steam coming out at 100s of km/h. At least until the tunnel got long enough to dissipate the heat and it becomes a river of boiling mud. I wonder why they'd even need the carts. Edit: Whoops, I accidentally some orders of magnitude. It's 'only' 50kg/s of steam.