METHOD FOR DETERMINING HEAT CONDUCTIVITY OF OXIDE FUEL MATERIAL FOR VENTILATED FUEL ELEMENT Russian patent published in 1996 - IPC

FIELD: nuclear power engineering. SUBSTANCE: in the course of testing ventilated fuel element in reactor, rate of emission of fuel material from fuel element through ventilation system is determined, heat release is measured in fuel material condensate discharged from fuel element; pressure of steam-gas mixture in ventilation system is also measured, then heat power is maintained constant for desired time interval, and variation in fuel material mass in fuel element is determined; maximum temperature T_o of fuel is evaluated; fuel material heat conductivity in fuel element is found from formula , where q_v is heat release density in fuel material; T_e is temperature of fuel element cladding; r_c is fuel core radius; ε_r is relative volume content of fuel material in fuel element. EFFECT: improved reliability of test results. 1 dwg