Nothing is indefinitely renewable. In the end, the second law of thermodynamics is an immovable barrier. When we talk about renewable, it's never endless, it's

Nothing is indefinitely renewable. In the end, the second law of thermodynamics is an immovable barrier. When we talk about renewable, it's never endless, it's renewable within reason. When it comes to nuclear though, the people claiming it's renewable usually refer to the presence of uranium in seewater, which is leeched from the ocean floor. That fits within the "renewable within reason" frame I talked about before. The issue with making that case is that collecting uraium from seawater is experimental reearch at this point ; it's definitely not an industrial process. Other examples of people conflating research with established industrial standards include people claiming we can get rid of nuclear waste with new reactors, or people claiming that we can recycle wind turbine blades. A reasonable case to be made is that, while nuclear is not renewable, the reserves we have is enough to let us buy another century of research and a reasonable chance to find more long-lasting solutions, whether it would be a great storage technology, fusion, new fission technology, a smart grid or whatever.