Wait, so you think nuclear reactors spew out uranium?

Didn't say that. But I also don't think that it magically appears in the plant.

While coal powerplants don't spew out radioactive coal ash??

Please stop this whataboutism.

Nobody cares to recycle concrete.

Not true. Making concrete creates huge amounts of CO2 during production. Sand is becoming a valuable resource. Recycling concrete for aggregate absolutely is a thing, but that's a different topic.

I wont talk about storing waste, because I dont know why it is marketed as prohibitively expensive.

Convenient. Then I will because I'm not finished. You have to ensure containment of the barrels for decades, if not centuries. The mine has to be in geologically inactive area, and you have to be certain that no ground water will seep into the mine in the foreseeable future. We don't want ground water in the mine, its cold and wet and seeps through everywhere.

And you have to figure out how to keep idiots from breaking into the mine in 150 years and using spent rods to heat their homes. If you think that's far fetched I encourage you to read about the Goiânia accident , one of the world's worst nuclear disasters. Some kids found the radioactive source of an abandoned xray machine while playing around.