Аннотация
A test object is a water-cooled technological channel with low-enriched uranium fuel (WCTC-LEU # 24) of the IVG.1M reactor. A porous two-dimensional axisymmetric model of IVG.1M WCTC was designed using the Ansys Fluent computation program, available operating model of a fuel assembly (FA) was optimized, which was simplified to a segment of one fuel element (FE). Computation models have been checked through comparison of stationary computation results with experimental data of the P17-08 start-up. Designed models enable performing thermophysical computations in emergency situations for safety substantiation.