Canada

CANDU is one of the best reactor designs currently running, in my opinion. The problem is that it's expensive to build, and requires expensive maintenance, and in a world that loves to cut corners and find efficiencies that is not popular. But it is solid, it is safe, and I support many more of them being refurbished, maintained and built in this country despite the cost.

Advanced CANDU on the other hand, had little in common with CANDU despite the name, and bowed to all of the previously mentioned pressure to cut corners and find efficiencies resulting in a dangerous and ultimately non-viable design that basically killed Canada's nuclear industry. It was a classic boondoggle, and while I was and am infuriated with the way Harper killed it and put it out of its misery, the real mistake had been pursuing it down that path in the first place which was a decision that came well before his time and was based on global circumstances that made it simply impossible to justify.

I would love to see even more advanced reactors being researched, designed and built here, modular, pebble bed, sodium, thorium, all of it. But sadly I think that is mostly unrealistic given the current state of our nuclear industry. CANDU is however at least one proven technology that we can and should continue to take advantage of. Even if we will probably never be nuclear leaders again thanks to the mismanagement and sabotage of our nuclear industry, at least we can cling to its legacy.