That depends on what you qualify as waste. As for the actual otherwise unuseful radioactive reaction byproducts this might very well be true. But in the indust

That depends on what you qualify as waste. As for the actual otherwise unuseful radioactive reaction byproducts this might very well be true. But in the industrial meaning nuclear waste also includes various stuff that can not (or could not at the time) be economically separated from the waste althought it is either not dangerous at all or useful as nuclear fuel. And also stuff that is simply radioactive and has nothing to do with nuclear reactors per se.