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The problems of reprocessing and long-term storage of spent nuclear fuel ( SNF ) at nuclear power plants with RBMK reactors have not been fully resolved so far. For this reason, nuclear power plants are forced to search for new options for the disposal of spent fuel, which can provide at least temporary  SNF  storage. One of the possible solutions to this problem is to switch to compacted  SNF  storage in reactor spent fuel pools ( SFPs ). As the number of spent fuel assemblies ( SFAs ) in  SFPs  increases, a greater amount of heat is released. In addition, no less important is the fact that a place for emergency FA discharging should be provided in  SFPs . The paper presents the results of a numerical simulation of the temperature conditions in  SFPs  both for compacted  SNF  storage and for emergency FA discharging. Several types of disturbances in normal SFP cooling mode are considered, including partial loss of cooling water and exposure of  SFAs . The simulation was performed using the ANSYS CFX software tool. Estimates were made of the time for heating water to the boiling point, as well as the time for heating the cladding of the fuel elements to a temperature of 650 °С. The most critical conditions are observed in the emergency FA discharging compartment. The results obtained make it possible to estimate the time that the personnel have to restore normal cooling mode of the spent fuel pool until the maximum temperature for water and spent fuel assemblies is reached.

Temperature conditions in the RBMK spent fuel pool in the event of disturbances in its cooling mode