Radioactive waste management? Cool if so, but in that case you should know that it doesn’t take 50-75 years cool down to start decommissioning.
BR3 operated from 1962 to 1987. It was chosen as a reactor to learn how to do decommissioning, which began in 1989. Today it’s essential a green field near a lake with a few buildings around. For me, that’s fully decommissioned.
Nuclear waste management in the past used to be laughably bad. At Dounraey they had 70m deep shaft with a tunnel at the bottom going out to sea. Contaminated gloves, overalls (which is what a lot of low level waste is) gloveboxes, maybe even an old Land Rover where unceremoniously chucked in this hole.
It blew it’s concrete top at one point due to hydrogen build up.
Thankfully we know better now.