I have heard several Left-leaning people here in the Open come out in favor of nuclear power.
But, interestingly, my non-Board (physical world) ND Left-leaning friends still lean fairly strongly against nuclear power. They are all solar and wind power.
On the substantive point: All of the waste generated by the entire industry is pretty small, and it is mostly solid material (e.g., spent fuel rods). Seems like it is easily more easily stored than any other waste material, and it does not pollute the environment.