I'd say the marketing on at least this article is more geared at the electric energy. Heat is a form of energy for sure, but not a big enough one that it could

I'd say the marketing on at least this article is more geared at the electric energy. Heat is a form of energy for sure, but not a big enough one that it could "transform clean energy". Nuclear can be ramped, but typically is not. I haven't dug into why, but I get the impression it's partially economic - the plants are very expensive to build and the marginal cost of a few hours of fuel is so low that they prefer to just run all the damn time. I think there may be some technical reasons as well. In general if you look at how utilities operate, they will ramp down literally everything else before the nuclear plants. That probably applies less to the Small Modular Reactors people keep talking about, but those are still not really a factor.