A bigger factor to note is that 95% of radiation is contained within 1% of the waste. I think the problem here is that people don't realize how small this number is. Because 11ktons sounds like a lot. But if you compare it to any other waste in the world it is tiny. Perspective is lost.
I also don't understand why not having a geological repository is an issue. Many researchers propose just storing it in place after decommissioning. You have a lot of shielding material (i.e. the other 99% of reactor waste that is mostly concrete) to protect a very small amount of radiation and keep the material distributed, which has some security benefits. Not having a centralized location doesn't seem like an issue. It isn't like humans are going anywhere anytime soon and we're going to lose information about where waste is stored. We have plenty of time to figure out a long term storage system that is still safe if the entirety of human information is lost. It's a great goal, but if that's our concern we should talk about deep geological repositories for a lot of other waste that we have that doesn't degrade overtime.
I also don't understand why not having a geological repository is an issue. Many researchers propose just storing it in place after decommissioning. You have a lot of shielding material (i.e. the other 99% of reactor waste that is mostly concrete) to protect a very small amount of radiation and keep the material distributed, which has some security benefits. Not having a centralized location doesn't seem like an issue. It isn't like humans are going anywhere anytime soon and we're going to lose information about where waste is stored. We have plenty of time to figure out a long term storage system that is still safe if the entirety of human information is lost. It's a great goal, but if that's our concern we should talk about deep geological repositories for a lot of other waste that we have that doesn't degrade overtime.