Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Disposal of Coolant, Equipment and Metal after the End of Service Life of NPP Power Units

9/10/2025 2025 - #03 Decommissioning

Sidorov I.I. Tashlykov O.L. Shcheklein S.E. Mokshin S.A. Filin I.A.

DOI: https://doi.org/10.26583/npe.2025.3.13

UDC: 621.039

The use of liquid metals as a coolant in fast neutron reactors is substantiated. The main properties of liquid metal sodium as a coolant, its advantages and disadvantages are described. Information on the amount of radioactive contamination of sodium and surfaces of equipment and pipelines of sodium circuits is given. The data on the dependence of the composition of deposits on temperature is presented. Information on methods of sodium cleaning from impurities is summarized. The technology of sodium cleaning from cesium using MAVR small-sized adsorbers and cesium accumulating traps is considered in detail. The results of sodium purification before draining the first circuit are presented using the example of the BN-350 reactor plant. The importance of sodium purification from cesium isotopes before decommissioning fast sodium reactors (FSR) to reduce personnel dose loads is shown.

The importance of increasing the efficiency of the radioactive waste management model by returning the maximum possible volume of contaminated metal to the industry is substantiated. The results of the work performed within the framework of preparation of the first stage power units of the Beloyarsk NPP for decommissioning after the final shutdown of the AMB-100 and AMB-200 reactors are summarized, including work on dismantling equipment and systems that are not involved in the decommissioning work.

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liquid metal coolant fast neutron reactor sodium purification from cesium radioactive waste liquid radioactive waste (LRW) processing and conditioning of radioactive waste decommissioning

Link for citing the article: Sidorov I.I., Tashlykov O.L., Shcheklein S.E., Mokshin S.A., Filin I.A. Disposal of Coolant, Equipment and Metal after the End of Service Life of NPP Power Units. Izvestiya vuzov. Yadernaya Energetika. 2025, no. 3, pp. 186-201; DOI: https://doi.org/10.26583/npe.2025.3.13 (in Russian).

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