"Tritium is the basic fuel of hydrogen bombs and is used to increase the power for fission bombs $...$ In a basic atom bomb $($or reactor$),$ plutonium atoms are split, or fissioned, to release energy, but the fission can be promoted with a small amount of tritium because it has two extra atom$-$splitting neutrons. Plutonium is a relatively stable material, and its natural decay is not a major factor in bomb maintenance. Tritium, however, decays at a rate of $5\mathrm{.}5$ percent a year."

What is the half life of tritium?

Why is this an issue?

Please solve this using Mathematica. $($the calculations must work when I evaluate the notebook$)$