As in other nuclear countries, the operation of the Ignalina NPP (INPP) in Lithuania has led to the accumulation of around 22 thousand of spent nuclear fuel (SNF) assemblies. A country’s responsibility for the safe management of its SNF is acknowledged worldwide. Within the European Union (EU), directive 2011/70/EURATOM contains the provision for every member state (country) to be responsible for the implementation of the safe and sustainable solution for SNF and radioactive waste management and disposal. Currently, it is envisaged that Lithuanian SNF will be stored in dry interim storage facilities (new and existing) for at least 50 y prior to possible deep geological disposal. Some investigations of the possibilities to dispose of the SNF in Lithuania have been initiated.
Researchers of Nuclear Engineering Laboratory have been actively involved in the analysis of problems related to the management of radioactive waste from INPP since 1994. For this purpose, the Laboratory performs assessments of the release of radionuclides from waste repositories, safety assessments of waste treatment technological equipment, storage and disposal facilities, and environmental impact studies. Typically, the safety and performance analysis are supported with the numerical modelling of coupled thermo-hydro-mechanical processes.
Taking this training course increased competence in understanding and modelling complex coupled THM processes in geomaterials. It also expanded the competence in the experimental tests that are used to calibrate numerical models and verify results. The gained knowledge and skills will allow LEI to contribute to the analysis of THM processes in the geological repository within the framework of EURAD and EURAD-2 more effectively.
