Question

describing potential problems
which statements accurately describe the waste generated by nuclear reactions? check all that apply.
it is hazardous for hundreds to thousands of years.
some waste can be recycled and used again.
it is hazardous to living organisms forever.
some waste can be completely transformed into energy.
it is not hazardous after a couple of years.

Explanation:

• Nuclear waste is radioactive. Radioactive materials have a half - life (the time it takes for half of the radioactive atoms to decay). Some nuclear waste has very long half - lives, on the order of hundreds to thousands of years, so it remains hazardous for a long time.
• Some nuclear waste can be recycled. For example, spent nuclear fuel from nuclear reactors can be reprocessed. In reprocessing, useful radioactive isotopes can be separated and used again in reactors.
• Nuclear waste is hazardous to living organisms. Radioactive emissions (alpha, beta, gamma) can damage DNA, cells, and tissues of living organisms.
• Nuclear waste cannot be completely transformed into energy. The laws of thermodynamics (especially the second law) and the nature of nuclear reactions mean that there will always be some residual radioactive waste.
• Nuclear waste is not safe after a couple of years. As mentioned, due to long half - lives, it remains hazardous for much longer periods.

Answer:

It is hazardous for hundreds to thousands of years.
Some waste can be recycled and used again.
It is hazardous to living organisms forever.