<prompt> Setsi sa nyutlelie ke eng?nan  <response>: Instruction in English: What is a nuclear reactor? . Response in English: A nuclear reactor is a device used to initiate, control and sustain a nuclear chain reaction, which generates heat energy that can be converted into electrical power. Nuclear reactors operate on the principle of nuclear fission, in which atomic nuclei are split into smaller fragments, releasing energy in the process. This heat energy is typically used to produce steam that drives turbine generators to produce electricity. Nuclear reactors are used in many countries as a source of electrical power, and they also have applications in research and for powering ships and submarines. . Response in Sesotho: Sesebediswa sa nyutlelie ke sesebediswa se sebedisetswang ho qala, ho laola le ho tshehetsa karabelo ya ketane ya nyutlelie, e hlahisang matla a mocheso a ka fetolelwang ho matla a motlakase. Li-reactors tsa nyutlelie li sebetsa ho latela molao-motheo oa fission ea nyutlelie, moo li-nuclei tsa athomo li aroloang likotoana tse nyenyane, li lokolla matla tsebetsong. Matla ana a mocheso hangata a sebelisoa ho hlahisa mouoane o tsamaisang lijenereithara tsa turbine ho hlahisa motlakase. Li-reactors tsa nyutlelie li sebelisoa linaheng tse ngata e le mohloli oa matla a motlakase, hape li na le tsebeliso ea lipatlisiso le ho matlafatsa likepe le likepe tse tsamaeang ka tlasa metsi. 