In the final stage of the nuclear fuel cycle, the spent fuel must be transported, processed, and disposed of properly.

Stored, reprocessed and disposed off properly

Explanation:

Common sense tells you that nuclear energy is released by combination or decomposition of nuclear elements. The reactor for the facilitation of this reaction could contain traces of the nuclear elements which create more harmful substance so this has to be well processed to a less harmful state and recycled in the process and waste are disposed.

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