METHOD FOR MEASURING MAXIMAL TEMPERATURE OF FUEL MATERIAL IN NUCLEAR-REACTOR FUEL ELEMENT

摘要

FIELD: nuclear power engineering. SUBSTANCE: method is used for experimental harnessing of ventilated fuel elements. Pressure P of gaseous fission products in fuel-element ventilation system and amount of fuel material m escaping from fuel element being ventilated are measured at reactor heat power maintained constant; maximal temperature T of fuel material in fuel element is evaluated using expression T = (mPR/(Atexp(-B/T)))²,, where :R is total resistance of ventilation system, l/m; A and B are factors depending on kind of fuel material; t is time, s; P is pressure, Pa; T is temperature, K; m is mass, kg. EFFECT: enhanced measurement accuracy. 1 cl, 5 dwg