How do nuclear power plants affect cities?

They light them up. They also power countless sections of the infrastructure as well as the businesses and homes of the residents.

They can pose a risk to the populace if there is an accident that releases nuclear material. Additionally, the long term storage of spent fuel is a cost that will eventually have to be borne by the citizens. And, because the radiation hazards of the spent fuel pose a risk for thousands of years, the policies and politics associated with the handling and storage of this dangerous material will not find any kind of easy agreement in the society.

However, they are still far safer than fossil fuel plants. Coal power pollution, for instance, kills as many people as the Chernobyl disaster every few weeks.