Nuclear chain reactions within power plants do not produce bomb-like explosions primarily because the
a. isotope of uranium used in power plants never undergoes fission
b. isotope of uranium used in power plants decays too quickly to be used for bombs
c. isotope of uranium used in power plants has a slower decay rate than the one used for bombs
d. density of uranium within nuclear fuel rods is insufficient to become explosive

D. Density of uranium within nuclear fuel rods is insufficient to become explosive

Explanation: Nuclear power plants use the same fuel as nuclear bombs, i.e. radioactive Uranium-235 isotope. However, in a nuclear power plant, the energy is released more slowly unlike in a nuclear bomb. The energy released is through nuclear fission, and radioactive decay occurs at the same rate as in nuclear bombs. therefore, option A, B and C are incorrect.

The primary reason why nuclear chain reactions within power plants do NOT produce bomb-like explosions is because the uranium fuel rods used in electricity generation is not sufficiently enriched in Uranium-235 to produce a nuclear detonation. This is the same idea in option D which is the correct option.

the answer would be a