According to the National program of Chernobyl NPP decommissioning and Shelter object transformation into ecologically safe system and taking into account world and local experience, normative documents of Ukraine and an actual status of ChNPP site, decommissioning is carried out in few stages:
1. Shut down (preparatory stage for decommissioning) - stage during which nuclear fuel will be removed and transported in the Spent Fuel Storage Facility intended for long-term storage. The current stage - during which the major task, defining stage duration, is carried out – nuclear fuel should be removed from power units. Time for completion is not earlier than 2014.
2. Final shutdown and preservation of reactor installations. During this stage preservation of reactors and most radioactively contaminated equipment (roughly till 2028) will be carried out.
3. Safe enclosure of reactor installations for the period during which natural decreasing of radioactivity up to the acceptable level should occur (roughly till 2045).
4. Dismantling of reactor installations. During this stage the equipment will be dismantled and site will be cleaned with the purpose to release in maximum restrictions and regulatory control (roughly till 2065).