I don't think this is the solution everywhere. In my country there is no safe space to put the waste.
And then don't forget France had real trouble keeping them going during summer heat waves because the rivers were so warm, they didn't cool down their nuclear power plants enough.
France had one (1) winter where they had some very slight trouble due to a confluence of Covid delayed maintenance, worse than expected refurbishment needed and a warmer than expected winter. That is to be offset against 40 years of selling carbon free energy over winter to all its neighbours.
We can literally bury the pellets in the ground where we got the uranium in the first place, and all nuclear waste ever produced would fit inside one football stadium with space to spare.