The paper describes constructions and technologies of production of dispersive types of fuel elements with ceramic fuel for KLT-40 active zone and results of their researches in the period before rector processing studies. The results of testing and researches of pilot fuel elements in mesh of “MIR” reactor, as well as the results of researches in the period after reactor processing studies have been presented. State of development of fuel elements has been analyzed, prospects of usage of cermet fuel have been determined.