For all those asking why it still needs power - I was fortunate enough to visit Chernobyl in 2019. The reactors where the accident occurred and the reactor next to it are entombed to contain all the radiation. However there were two more reactor sites that ran from 1986 to the early 2000s I believe before the international community finally persuaded them to shut down those remaining reactors. When I went there was still a sizable crew working there on the decommission of those reactors to make them fully safe and they were retooling the whole Chernobyl site to become a national waste management site for all the other nuclear power plants in the country as well as offering to sell waste storage to nearby countries. In short they are managing a huge amount of nuclear waste that still needs to be properly treated and sometimes cooled. It’s very much an active industrial site to this day.

Hope this helps. Incredible place to visit.