You'll get a lot of comments regarding the grid's immaturity to handle a variable load of renewable sources, but the the path of building new nuclear power plan

You'll get a lot of comments regarding the grid's immaturity to handle a variable load of renewable sources, but the the path of building new nuclear power plant designs as well as forecasts of the ability to store waste for their planned cost has even less maturity. Living in Southern California, I've been watching the botched upgrade of the San Onofre plant power generation system. There was a well understood, existing design being upgraded with modern engineering under a regulatory watch of the NRC. Nobody in any quarter of that case wanted the upgrade to fail, but despite best efforts and intentions, there was a critical failure in the equipment. The cost of storing nuclear waste falls under similar uncertainty, efforts to build long term storage facilities in the US and UK have huge cost growth, pointing at the immaturity of the ability to plan, cost-estimate, and technically achieve the goal.