Iadrolyq jandyrǵysh — ıadrolyq energıanyń bosaýymen júretin bóliný nemese sıntez reaksıalaryna ıadrolary qatysatyn zattar. Iadrolyq zarádtardaǵy ıadrolyq jandyrǵysh —  ýran-235-tiń jáne plýtonı- 239-dyń, sýteginiń (aýyr sýtegi — deıterıdiń, asa aýyr sýtegi — trıtıdiń) ızotoptary. Tabıǵatta kezdesetin (mysaly, ýran-235) bastapqy ıadrolyq jandyrǵysh jáne arnaýly reaktorlarda alynatyn (mysaly, ýran-233, plýtonı-239) qaıtalama ıadrolyq jandyrǵysh bolyp bólinedi. Iadrolyq jandyrǵyshtyń energıa bólip shyǵarý úlesi ádettegi otyndar men jarylǵysh zattarǵa qaraǵanda birneshe mıllıon ese joǵary bolady.