Optimization of costs during temporary storage of radioactive waste (RW) packages can be achieved through the use of light hangar-type storage facilities. Novovoronezh NPP, a branch of Rosenergoatom Concern JSC, has developed a technology for conditioning RW materials in the form of a salt monolith of deep evaporation installations in primary packages (steel cylindrical containers) by placing them in an additional package — a non-returnable protective container. When forming packages, an asymmetric loading method is used, which minimizes the gamma background from the two side faces of the container due to the formation of a sharply asymmetric gamma radiation pattern. Empirical dependences have been developed and successfully tested to assess the radiation situation on the ground during temporary storage of RW in hangars. On the basis of the Monte Carlo method specialized software has been developed to predict changes in the radiation situation on the ground when rearranging RW packages and making decisions about the possibility of placing containers in the peripheral rows of the storage.
Keywords: radioactive waste, temporary storage, hangar, non-returnable protective container.
Article language: Russian. Pp. 5–12. DOI: 10.26277/SECNRS.2021.102.4.001.