Hmm, did you ever consider that ... nuclear power involves storing a huge amount of energy! Those huge cement walls and vassals require huge investments of money, energy, and materials. Just as much, that is energy invested in a particular location and assuming that location will continue to require energy. That's energy that's wasted if something goes wrong the construction or operation of the plant and that's energy that's gone at the end of life of the plant.
If you just require energy storage, it may be expensive but there are a number of flexible methods, some of which scale very easily (and others are cheaper but only at large scale, etc).
Hmm, did you ever consider that ... nuclear power involves storing a huge amount of energy! Those huge cement walls and vassals require huge investments of money, energy, and materials. Just as much, that is energy invested in a particular location and assuming that location will continue to require energy. That's energy that's wasted if something goes wrong the construction or operation of the plant and that's energy that's gone at the end of life of the plant.
If you just require energy storage, it may be expensive but there are a number of flexible methods, some of which scale very easily (and others are cheaper but only at large scale, etc).