That's from building nuclear weapons though, not power

Both Jimmy O. Yang and Sheng Wang are hilarious, but you should recognize that they are two different people.

Given that the first commercial nuclear power plants in the US were coming online in the late 1950s, that's entirely possible. Steam trains were well on their way out by then, but there were still a few hauling freight around.

Fun adjacent fact: even when the British Empire had moved off of wind sails and into coal, those coal ships didn't have the range to possibly cover the entire Empire. Coal stations were setup around the world, and the coal had to be transported by sail. The previous technology helps get the next generation technology going.