My guess is that Pope Francis knows nothing about nuclear power other than Chernobyl and Fukushima. He probably doesn’t know the difference between how a nuclear power plant works and how a nuclear bomb works. He probably doesn’t know that nuclear power generates electricity carbon-free. He probably doesn’t know how regulated nuclear power is, or how trained and dedicated the workers at the plants are.
So am I surprised that the Pope takes a position on nuclear power that is in line with many left-leaning politicians and talking heads in the world? Not really.
When we’re talking about providing electricity to improve the quality of life and standard of living for the entire world, any method of generating that electricity will have pros and cons, risks, advantages and disadvantages. In some areas, hydroelectric power makes the most sense; in others, solar; for others, nuclear, or wind, or coal, or gas, or so on. The Pope is so black and white on political issues when it comes to choosing the “liberal” stance on many things, but for some reason when it comes to Church teaching everything is in a messy grey area.