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Potchefstroom

(Encyclopedia)Potchefstroom pŏchˈəfstrōm, –stro͞om [key], city, now part and seat of Tlokwe local municipality, North West prov. (in what formerly was part of Transvaal), NE South Africa. Located in a fertil...

chain reaction

(Encyclopedia)CE5 Chain reaction: A neutron (n) strikes the uranium nucleus (U-235), causing it to split into fission products A and B and release two neutrons. These neutrons can in turn cause further fissions....

isotope

(Encyclopedia)CE5 Isotopes of hydrogen isotope īˈsətōp [key], in chemistry and physics, one of two or more atoms having the same atomic number but differing in atomic weight and mass number. The concept of ...

francium

(Encyclopedia)francium frănˈsēəm [key] [from France], radioactive chemical element; symbol Fr; at. no. 87; mass no. of most stable isotope 223; m.p. about 27℃ (estimated); b.p. 677℃ (estimated); sp. gr. unk...

Casper

(Encyclopedia)Casper, city (2020 pop. 59,038), alt. 5,123 ft (1,561 m), seat of Natrona co., E central Wyo., on the North Platte River; inc. 1889. It is a rail, distr...

Three Mile Island

(Encyclopedia)Three Mile Island, site of a nuclear power plant 10 mi (16 km) south of Harrisburg, Pa. On Mar. 28, 1979, failure of the cooling system of the No. 2 nuclear reactor led to overheating and partial melt...

Limoges

(Encyclopedia)Limoges lēmôzhˈ [key], city (1990 pop. 136,407), capital of Haute-Vienne dept., W central France, on the Vienne River. It is famous for its ceramics industry, which uses the abundant kaolin in the ...

Klerksdorp

(Encyclopedia)Klerksdorp klĕrksˈdôrp [key], city, part and seat of the City of Matlosana local municipality, North West prov., NE South Africa, on the Schoonspruit River. The town, which has grain elevators, lum...

thermite

(Encyclopedia)thermite [from Thermit, a trade name], mixture of powdered or granular aluminum metal and powdered iron oxide. When ignited it gives off large amounts of heat. In wartime it has been used in incendiar...

radioactive waste

(Encyclopedia)radioactive waste, material containing the unusable radioactive byproducts of the scientific, military, and industrial applications of nuclear energy. Since its radioactivity presents a serious health...