FIELD: atomic power engineering. SUBSTANCE: getter produced from refractory material in the form of thin-walled screen is placed inside heat-emitting fuel elements with gas discharge tube. It is located between fuel material and gas discharge tube. Mass of getter is chosen from relationship 
, where 
is mass of fuel material; 
are masses falling at one molecule (atom) of getter and uranium dioxide accordingly; x is oxygen factor k is relation of atoms of getter and oxygen in oxide; Q is thermal capacity of fuel element, W; τ is operation time, s. EFFECT: operational efficiency. 6 cl, 1 dwg
