nuclear has an opposite but related storage problem to solar and pv; whereas it's hard to reliably predict and line up solar and wind power, it is also generally hard to spin nuclear up and down quickly according to peak power demand as well. one of the first uses of pumped hydro was to store excess power at nuclear stations. https://en.wikipedia.org/wiki/Ludington_Pumped_Storage_Power...

transmission is also an issue at nuclear stations, because no one wants to live near one, and they generate so much power you would probably need additional transmission capacity wherever one was sited anyways.