I am afraid we can only have one of those attributes. While I accept that those two things (safe fission power, and cheap fission power) are in obvious tension

I am afraid we can only have one of those attributes. While I accept that those two things (safe fission power, and cheap fission power) are in obvious tension with each other, your "choose only one" scenario is a false dichotomy. A well-functioning, technologically advanced, and motivated country could easily overcome this. Standardized reactor designs, simplified reactor designs such as the newer molten salt reactor designs, etc. We have the technology to do this safely and cheaper than we're doing it now; we just don't have the will. Also, any talk of cost must include not only the short-term kWh cost, but the long term cost -- ie, the terrible cost of climate change that we'll soon be paying. And figuring out how to build cheap nuclear in the West is actually a pretty complex thing Yeah, no arguments there. The US is no longer capable of tackling long term initiatives like this, because any change will necessarily upset the corporations that effectively own the government. Nothing will change until the ice caps melt and half our coastal cities are flooded, and at that point something might happen but probably not anything good.