I think a nuclear plant in Manhattan would cost far more than just building the plant in outer NY, and then running a big power line in to Manhattan. Sure, the power line would take up space, but so would the nuclear plant's cooling system.
So's a turbine. Sometimes people don't want heating, but you still need to cool down the plant. And while I'm sure the nuclear plant will have a great emergency stop button (the type where paying $1k per press is absolute peanuts), the systems used daily to turn the heat up/down will either need a buffer, or have a delay on taking the heat up/down. That'll take up space. Remind me why power lines aren't an option?
Manhattan is an island. It's surrounded by cooling fluid.
> Sometimes people don't want heating, but you still need to cool down the plant.
You can turn it down or off.
> Remind me why power lines aren't an option?
It's more economical not to waste half the plant's power output. 1 GW of heat comes out the reactor, 50% becomes electricity (with heat pumps you can make that 2x heating) and 50% is low-grade heat sufficient for space heating. You get 1/3 more heating for the same cost.
We should, it would replace significant amounts of natural gas usage for space heating. Not doing so is literally cooking the planet.