That's probably true to a certain extent, i'm not an expert on radioactive stuff, but your point about using different fission process has some merit in that it uses some/a lot? of the radioactive products that get created, as fuel. I think back in the day, they called reactors that did that, "breeder" reactors. However the other parts that become radioactive because of neutron bombardment, i.e. the stainless steel support structures, have to be taken into account. Also take issue with your characterization of "returning" the material back into the ground as a bit white washy. I'm not saying that Hanford Nuclear Reservation is a model for storing radioactive materials, but they buried stuff into the ground and it's leaking into the Columbia river. I wish/hope fission produced electric power will be a viable source of electric power, but don't look to my back yard as a place to bury your radioactive material.