Question

a nuclear power plant is scheduled to undergo a retrofitting. what is the most likely outcome of the change?
the power plant will no longer generate radioactive wastes.
the power plant will recycle the water it uses to cool the reactor.
the power plant will be able to reprocess its used uranium fuel.
the power plant will switch from fission reactions to fusion reactions.

Explanation:

Retrofitting a nuclear power plant often involves improving existing systems. Recycling cooling water is a common and feasible retrofitting measure. Nuclear power plants still generate radioactive waste even after retrofitting. Reprocessing used uranium fuel is complex and not a typical outcome of a general retrofitting. Fusion reactions are not currently used in commercial nuclear power plants and retrofitting won't suddenly switch a plant to fusion.

Answer:

The power plant will recycle the water it uses to cool the reactor.