At the point in time I think I am really ambivalent about nuclear Energy. Its not just Chernobyl but Fukushima incident that illustrates how minuscule error in our calculation can create a debacle. As more countries starts to enjoy nuclear energy the risk will further increas. And Imo the main problem is we can't even control the nuclear meltdown waste and whole world might have to suffer the consequence which can be problematic (One example I can remember is how China was complaining when Japan decided to release those waste nuclear water).

Is there guarantee way to construct safe nuclear plant? I am asking because I don't know the state of arts regarding nuclear power plant (I have started to hear about Thorium and don't know about safety and google is not the friend here unfortunately). If there are natural disasters etc., is nuclear plant robust against meltdown? Can we calculate the risk before hand?