System of special water purification of spent fuel pool of Beloyarskaya Nuclear Power Plant unit BN-800

The problem of handling of nuclear power plants radioactive waste has a significant impact on the development of the nuclear industry. An effective strategy for radioactive nuclear waste should include all of the components and processing steps since waste formation to final disposal, taking into account emergence of new technologies, changes in the regulatory authority requirements, the duration of the time intervals separating the initial and the final stage of the treatment process [1]. After unloading from the reactor core spent fuel assemblies are placed in spent fuel pools for removing of residual heat and radioactivity decrease. After one year of conditioning radioactivity is reduced by about 10 times, after 5 years radioactivity is reduced by 35 times. After 3-5 years the spent fuel assemblies can be transported to a centralized storage facility or sent for processing. However, the maintaining of necessary conditions for temporary storage is an important task that is carried out by special water treatment systems of the spent fuel pool [2]. This article considers the water purification system of the spent fuel pool of the Beloyarskaya nuclear power plant, which is the flagship of Russian nuclear power industry. (paper)