If you believe renewables can gather the energy from the Sun fine, but we also need some backup and baseload. If you also worry about CO2, Nuclear seems the obvious choice.
The reactor described reuses nuclear waste of which there is a lot - and we have to store it for, well, ever with no benefit at all. It will still be there, but we get power.
This
could be a solution.
EDIT - it could replace the electricity lost from this for a start.
http://www.bbc.co.uk/news/uk-scotlan...-fife-21788332