It's a bit more nuanced than that. Nuclear plants can alter their output by more aggressively cooling the reactor. This wastes heat, but can be used to curb ele

It's a bit more nuanced than that. Nuclear plants can alter their output by more aggressively cooling the reactor. This wastes heat, but can be used to curb electrical output in a pinch. But it doesn't reduce operating costs like running a gas plant for reduced hours. The overwhelming majority of nuclear power's cost lies in construction, and reducing output doesn't result in any savings.