LONG-TERM SAFETY ASSESSMENT OF “RADON” TYPE FACILITY

摘要

Up till now multi-barrier systems are accepted as a basic approach for long-term radioactive waste isolation innear-surface and deep repositories. Performance assessment of the natural and hand-made (engineered) barrierson time is one of the main difficulties to evaluate reliability of the waste insulation due to the large number ofpossible scenarios and uncertainties to be considered. The International Atomic Energy Agency (IAEA) hadlaunched the Coordinated Research Program on Improvement of Safety Assessment Methodologies for Near-Surface Radioactive Waste Disposal Facilities (ISAM) at the end of 1997 with the purpose to provide a criticalevaluation of the approaches and tools that are currently used in the long-term safety assessment of near-surfaceradioactive waste disposal facilities. This paper describes an application of the ISAM methodology to safetyassessment of Russian near-surface disposal facilities of low - and intermediate-level radioactive waste (“Radon”facilities)