The comment said that solar powered trains would only be able to run at night if wind generation is sufficient to power them in the absence of solar power - at least not without massive amounts of storage to account for this intermittency.
Regardless, I'm not sure why the inability to detoxify waste is such a concern. First of all, we do have the ability to reclaim >95% of it through reprocessing. This isn't detoxification per-se, but does represent a sizeable reduction in the amount of waste. And the remaining waste is stored underground. The danger of uranium entering the water supply already exists from naturally occurring uranium. The additional risk presented by waste buried in a known location, with no groundwater contamination risk is zero. Sure, if you want to be pedantic, it's not exactly zero: some nefarious group could dig it up and use it as a weapon. But any group with that level of capability could easily deal more damage through conventional means - so for all intents and purposes the risk is zero.
Regardless, I'm not sure why the inability to detoxify waste is such a concern. First of all, we do have the ability to reclaim >95% of it through reprocessing. This isn't detoxification per-se, but does represent a sizeable reduction in the amount of waste. And the remaining waste is stored underground. The danger of uranium entering the water supply already exists from naturally occurring uranium. The additional risk presented by waste buried in a known location, with no groundwater contamination risk is zero. Sure, if you want to be pedantic, it's not exactly zero: some nefarious group could dig it up and use it as a weapon. But any group with that level of capability could easily deal more damage through conventional means - so for all intents and purposes the risk is zero.