Final answer:
High-level radioactive waste from commercial nuclear power plants is currently managed through a combination of storage methods, including pools of water and dry storage facilities. However, there is no permanent disposal facility for this waste in the United States.
Step-by-step explanation:
High-level radioactive waste from commercial nuclear power plants is currently managed through a combination of storage methods. After the fuel is used in a nuclear reactor, it becomes spent fuel and needs to be stored and handled with multiple containment measures. Initially, the spent fuel is stored in specially designed pools of water, where it is cooled and acts as a radiation shield. As an alternative, spent fuel can also be stored in dry storage facilities using special outdoor concrete or steel containers with air cooling. However, there is currently no permanent disposal facility in the United States for high-level nuclear waste.