I assume you mean nuclear power. I also like nuclear power, but it has a very high capital cost, it is not cheap to operate and there are restrictions on where it can be built. The same is true of hydroelectricity, geothermal, wave, tide and OTEC power systems.
These days, the term "alternative energy" means an alternative to fossil fuel. That goes beyond just wind and solar.
These days, the term "alternative energy" means an alternative to fossil fuel. That goes beyond just wind and solar.