Abstract
The paper presents the scientific and technical basis for the long-term storage of spent nuclear fuel (SNF) from the BN- 350 reactor in a dedicated silo-type storage facility. The key conceptual provisions and engineering solutions aimed at ensuring nuclear safety and corrosion resistance of the storage system are described. Safety analyses were performed to substantiate the safety of SNF storage. Thermal analysis of an individual storage cell demonstrated that, even in the absence of forced cooling, the maximum temperatures of the fuel and structural components remain within established safety limits. The adopted layout and design solutions ensure subcriticality of the system under all considered conditions, including off-normal scenarios. The results of this study may be used to support the evaluation of further options for the management of SNF from the BN-350 reactor.