Regarding your comment: "Next Gen reactors will be able to...

Regarding your comment: "Next Gen reactors will be able to recycle nuclear waste"

Forget about Next Gen reactors. There are already thousands of nuclear plants around the world that aren't Next Gen & don't recycle nuclear waste. Any one of those only needs to suffer a catastrophic meltdown once: meltdown has happened at least five times that we know of (Windscale, Chernobyl reactor 4, Fukushima reactors 1, 2 & 3). It's the current populations as well as future generations that need to deal with all the horrid contamination inflicted on their health & the broader environment. Waste disposal from various nuclear processes is exponentially problematic, especially in view of historic & current containment efforts that are far from safe.

Regarding your comment: "If a nuclear plant spewed radioactive ash like a coal plant it would have to have collection filters."

The Fukushima & Chernobyl explosions spewed clouds & particles all over the place: radioacitve vomit heaved over thousands of square kilometers. Collection filters would have been totally useless. The UK Windscale reactor (1950's) was fitted with collection filters & they proved to be ineffective for the containment of radioactive particles during a reactor fire.

An interesting article about The Meaning of Sustainability:

https://www.albartlett.org/articles/art_meaning_of_sustainability_2012mar20.pdf