Yes. You can process the Uranium waste into Plutonium Fuel Rods, which you can sink. It takes a lot of energy though, so you can burn the Plutonium rods to recoup that and then some, but then you get untreatable Plutonium waste instead, which is 20x more radioactive than Uranium waste, but builds up at like 1/20th the rate.Is it possible to treat all the waste and feed it into a sink? I've never used nuclear power because I hate the idea of making something that can't just run forever. I haven't looked at what was added in the more recent nuclear updates.
The power gain is pretty significant though. My setup there is 72 Nuclear plants on Uranium with full recycling, and the Plutonium rods I'm throwing away could provide for 44 additional Nuclear plants which each produce only 1/min Plutonium waste, and would take over 9 hours to fill a single large storage container. But I also want it to just run forever, and 72 Nuclear plants is already such massive overkill that there's no point in going further.