I need to know how much longer nuclear energy will last. I also need to know how much available of nuclear energy is left. Can you also name some disadvantages and advantages of nuclear energy? Please? Thanks so much!

(may be broke/outdated!)
I need to know how much longer nuclear energy will last. I also need to know how much available of nuclear energy is left. Can you also name some disadvantages and advantages of nuclear energy? Please? Thanks so much!