Аннотация:
An original thermal-hydraulic method for optimizing the thermal resistance of thermal conductivity of fuel rod matrix
upgrades has been developed to achieve the maximum burnup depth of nuclear fuel while ensuring safety conditions in
operating and emergency modes of nuclear power plants. Based on the developed method, the boundaries of the
optimization area for upgrades of the thermal resistance of the fuel rod matrix thermal conductivity are determined in
accordance with the accepted optimization criteria and safety conditions. It is established that when optimizing upgrades
to the thermal resistance of nuclear fuel, it is necessary to take into account both normal operating conditions and
emergency conditions with impaired heat removal from the reactor core. It is established that the optimal values of thermal
resistance of nuclear fuel thermal conductivity depend on the design and technical parameters of reactor installations,
composition, and condition of nuclear fuel, accident management systems, and other factors.
