The reactor pressure vessel is made of stainless steel with a thickness of 30 millimetres (1.2 in) and a diameter of 2.4 to 6.0 m.[6]: 20  The first circuit of the cooling system consists of five active and one reserve loop.

[7] Some 3,000 cubic metres (110,000 cu ft) of liquid radioactive waste, mainly sodium and caesium-137 with a half-life of 30 years, are stored at MAEK-Kazatomprom.

By order of Techsnabexport, the Scientific and Technical Center for the Safety of Nuclear Technologies of Kazakhstan will have to collect and analyze the documents of the regulatory framework of Kazakhstan in the field of decommissioning of nuclear facilities and radioactive waste management and assess the sufficiency of this base for carrying out direct work on decommissioning out of service BN-350.

Then it will be necessary to select technologies for solving priority work on transferring the BN-350 to a safe state, develop initial requirements for the structure and composition of technological complexes and infrastructure, develop requirements for space-planning solutions and perform an indicative (aggregated) economic assessment of the decisions made.

First, it is planned to transfer the reactor facility to a state of safe storage within 10 years, then ensure long-term safe storage within 50 years, and then perform partial or complete dismantling of equipment, buildings and structures, and ensure the management of radioactive waste.