From both economic and nuclear perspectives, the most viable fuel choice for a thermonuclear fusion reactor is____________________?
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Answer: C. deuterium
Explanation
Deuterium offers a highly favorable fusion cross-section and is abundantly available in natural ocean water resources. Its widespread oceanic abundance makes deuterium economically viable for fueling future commercial fusion power plants. Nuclear fusion reactions involving deuterium release enormous amounts of energy relative to the fuel mass consumed. Deuterium is a stable, naturally occurring heavy isotope of hydrogen containing one proton and one neutron. Thermonuclear fusion requires extreme temperatures and pressures to overcome electrostatic repulsion between atomic nuclei. Seawater contains vast quantities of deuterium molecules, ensuring virtually limitless fuel supplies for humanity.
Fusion energy research heavily prioritizes deuterium-based fuel cycles to solve long-term global energy supply challenges. Commercializing deuterium fusion will provide clean baseload electricity without producing long-lived radioactive waste products. Extraction of deuterium from water is a well-established industrial chemical engineering process. Plutonium is a heavy man-made actinide utilized in fission reactors rather than thermonuclear fusion systems. Uranium is the primary heavy element utilized in conventional nuclear fission rather than fusion power reactors. Lithium is used to breed tritium for deuterium-tritium fusion, but deuterium remains the primary foundational fuel.
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