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Even though plutonium−239 (t1/2 = 2.41 × 104 yr) is one of the main fission fuels, it is still a radiation hazard present in spent uranium fuel from nuclear power plants. How many years does it take for 83% of the plutonium−239 in spent fuel to decay?

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pstnonsonjoku

Answer:6.468*103 years

Explanation:

The half life refers to the time it takes for the radioactive sample to decay to half the initial amount present. The detailed solution is found in the image attached. The formula used here is used to brain the time taken for a given amount of radioactive material to decay if the half life and original amount of radioactive material in the sample is known.

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