That's not really an achievement. It's one thing to have power intermittently, it's another to have it when you need it. Even wind-happy Britain is getting rational and moving hard to nuclear, for at least 25% of their power needs. And in the big scheme of things, nuclear is cleaner than solar or wind when you look at power out, and total costs (construction, running, and decommissioning).
Wind is great - when the wind blows. When it doesn't? Nuclear for electric generation, use intermittents like wind and solar for things like desalination, or other tasks that can be done when power is available, not when people need the power.
Decommissioning costs are figured out up-front, or you don't get a license to make the plant in the first place. Unlike other sources, nuclear is required to provide all those costs, at Government estimated rates.
Nuclear is the ONLY sensible solution going forward, as it's about the safest, and it IS the lowest greenhouse gas output source there is.
"A car is just a big purse on wheels." -- Johanna Reynolds