You're either uneducated or a bad faith debater, or German.

https://www.reuters.com/world/unsealed-soviet-archives-reveal-cover-ups-chernobyl-plant-before-disaster-2021-04-26/

Chernobyl was a major disaster because it was Soviet crap that wasn't well regulated or maintained.

https://carnegieendowment.org/2012/03/06/why-fukushima-was-preventable-pub-47361

Same with Fukushima. Wasn't kept up to international standards for nuclear prevention. The tsunami wall was also considered inadequate at the time it was made.

Nuclear power is incredibly safe when done right, and incredibly powerful. The efficiency of nuclear power is unmatched. If the Jimmy Carter era policy of not reusing nuclear power (which is also safe but less efficient) you have effectively reduced nuclear waste that needs to be removed to an insubstantial amount. We even have an entire MOUNTAIN hollowed out to store nuclear waste.

Overall, when done right, nuclear power is safe and efficient, more efficient than any other renewable out there, and don't fret, I know nuclear power isn't technically renewable, just recyclable, but we have do much nuclear energy it's insane not to use it.