The major forms of energy available in amounts of 30% or greater of the total power developed in a controlled thermonuclear reactor (CTR) operating on a Deuterium-tritium fuel cycle are (1) high-temperature thermal energy, (2) electric energy—high and low voltage, and (3) neutron and gamma high-energy radiation. The thermal and electric forms of CTR energy can be applied to supply a significant fraction of the needs of a conventional heavy chemical and material processing industry. The minor forms of CTR energy, based on a Deuterium-tritium fuel cycle, available in amounts less than 10% of the total power developed in CTR reactors, include ultraviolet energy from the plasma, secondary high-energy particle (p, α, β) energy, and ionized particle energy from the blanket. These forms will be useful mainly as a by-product from either thermal or electric CTR power generators. Eventually larger ultraviolet efficiencies may be available from the advanced Deuterium-deuterium fuel cycle.