One must be careful here. it is true that this gives us something to do with the waste during some time. However, most of the waste will still be waste after the experiments. The reason is that dark matter interacts very weekly, so that it will interact only very little with the excited isomers. But at least, this may buy some time to further think about what to do with those pieces of waste...
It was nice to read from you! It was a long time ^^