While fusion is a nuclear process, the products of the fusion reaction (helium and a neutron) are not radioactive, and with proper design a fusion power plant would be passively safe, and would produce no long-lived radioactive waste.
In the United States and formerly Canada a ton is defined to be 2,000 pounds (907 kg). Where confusion is possible, the 2240 lb ton is called  long ton  and the 2000 lb ton  short ton ; the tonne is distinguished by its spelling, but usually pronounced the same as ton, hence the US term metric ton.here confusion is possible, the 2240 lb ton is called  long ton  and the 2000 lb ton  short ton ; the tonne is distinguished by its spelling, but usually pronounced the same as ton, hence the US term metric ton.
See tonnage. short ton (usually called simply ton, in the USA or sometimes called a net ton) = 2,000 lb (about 907.18474 kg). Harbour ton used in South Africa in the 20th century, equal to 2000 pounds or one short ton. metric ton, usually referred to as a tonne, is 1,000 kg (or 1 Mg) or approximately 2,204.6 pounds. Both the long ton and the short ton are composed of twenty hundredweights, each having different values for the hundredweight (112 and 100 pounds respectively).