$5.6B actually sounds like a good deal. It outputs 2GW+ of power. While solar is definitely cheaper for 2GW of power, you still need batteries for when the sun is down. So you probably need approximately 30GWh of batteries to just replace this one power plant. The batteries alone would cost nearly $7B of grid-scale batteries that must be replaced every 20 years.
Ignoring the fact that the nuclear plant already exists, this still seems like the right way to go mostly because it's impossible to build this nuclear power plant for $16B in the US anymore (or so it seems).
Ignoring the fact that the nuclear plant already exists, this still seems like the right way to go mostly because it's impossible to build this nuclear power plant for $16B in the US anymore (or so it seems).