THE USE OF EMPIRICAL AND COMPUTATIONAL METHODS IN ASSESSING POSSIBLE ABNORMAL OPERATION AT LIQUID RADIOACTIVE WASTE DEEP DISPOSAL FACILITIES

The paper evaluates the risk of anticipated operational occurrences at liquid radioactive waste deep disposal facility (LRW DDF) and their possible radiological consequences at the operational and post-closure stage. The evaluations were performed with due account of applicable federal norms and rules and sanitary rules concerning the safe disposal of liquid radioactive waste. The main options describing possible evolution of features, events and processes (including accidents) that can result in abnormal operation of the facility and involving some radiation consequences were considered. At the stage of waste predisposal treatment and injection itself, integrity loss of process pipelines, receiving tanks, pumps and other equipment associated with natural causes (due to corrosion, etc.) was considered as critical events for the deep disposal facility «Severniy», chosen as an example of such a facility. The frequency of such events was estimated using analog method with prototypes being considered as estimated pipeline damage at nuclear power plants and representative statistics of failures at petroleum pipelines and municipal water supply pipelines....

Keywords: radioactive waste; liquid radioactive waste; regulatory requirements; safety case; features, events and processes; external effects of natural and anthropogenic origin; probability safety assessment; potential radioactive exposure; deep disposal facility “Severniy”; analog method; PC “GEOPOLIS”

Suskin V. V., Savkin M. N., Utkin S. S., Konovalov V. Yu., Ponizov A. V. The use of empirical and computational methods in assessing possible abnormal operation at liquid radioactive waste deep disposal facilities. Radioactive Waste, 2020, no. 1 (10), pp. 22—34. (In Russian). DOI: 10.25283/2587-9707-2020-1-22-34.