You can't store it? Any energy can be stored. Current methods in use or development include chemical batteries (there is even a line item on the California ISO daily charts for it
http://www.caiso.com/TodaysOutlook/Pages/supply.html -- near the bottom of the page), pumping water uphill to retrieve the energy later by reversing the pump as a generator, spinning up flywheels, or compressing air.
Nuclear's biggest problems have been managerial and political, including such examples as Chernobyl and San Onofre. The Fukushima reactors failed after the earthquake and tsunami because of a simple design error in the auxiliary equipment -- if the standby pumps had not failed they would all be operational today.
And then there is the Gates-backed nuclear reactor design -- no chance of a steam explosion or hydrogen fire because the working fluid is liquid sodium.
https://www.cnbc.com/2021/04/08/bill-gates-terrapower-is-building-next-generation-nuclear-power.html