Cover model of national radioactive waste repository at Mochovce site

National low and intermediate level radioactive waste repository is operating from 2001 and it is appointed for disposal of solid and solidified low and intermediate level radioactive waste resulting from the operation and decommissioning of nuclear facilities NPP Jaslovske Bohunice and NPP Mochovce, from decommissioning of NPP A1 in Jaslovske Bohunice, waste form research institutes, laboratories, hospitals and other institutions involved in activities during which radioactive waste are produced. The near-surface disposal site at Mochovce is designed a vault-type concrete structure housing of 7200 concrete fibre reinforced containers as the final waste packages with accumulated volume of 22 320 m3. After operational period repository will be covered by structure of final covering, which must warrant repository safety at least during the institutional control period (300 year). To prove long-term stability of final repository covering the methodology with activities described in this paper was proposed. (author)