The relevance of the article is due to the fact that in the context of countering largescale aggression, Ukraine's actions to de-occupy the captured territories and implementing its strategic course to join the European community and NATO, there are potential threats from the russian federation. Continuing its hostile rhetoric, terrorising Ukraine with missile strikes, the russian leadership threatens to use nuclear weapons, which poses the highest level of danger and can lead tolarge-scale radiation contamination (Lessons of the russian-Ukrainian war 2022: military aspects, 2022). Taking into consideration this state of the security environment, it is necessary to respond effectively to nuclear threats and ensure reliable protection of troops, which, in their turn, should be ready to act in radiation contamination conditions. This requires the Armed Forces of Ukraine to effectively train military units of chemical, biological, radiological and nuclear defence capable of performing their assigned tasks and, in the further future, to be ready to detect and assess nuclear threats in joint actions (operations) with the units of NATO member states. All this requires solving problematic issues related to the nomenclature of chemical, biological, radiological and nuclear defence equipment of the Armed Forces of Ukraine to ensure the required level of protection of troops. Especially challenging tasks in the current environment are the detection and assessment of the chemical, biological and radiological situation of the movement routes and areas of troops' concentration, the covering of troops and facilities of the Armed Forces of Ukraine from reconnaissance and destruction by modern precision weapons, and the liquidation of the chemical, biological and radiological contamination consequences. To a large extent, the maximum reduction of troop losses during actions in conditions of chemical, biological and radiological contamination is ensured by the application of existing and prospective assets of chemical, biological, radiological and nuclear defence However, it is impossible to make reasonable decisions on the nomenclature of mobile chemical, biological, radiological and nuclear defence equipment without determining the amount of losses of chemical, biological, radiological and nuclear defence equipment during the conduct of tasks in the operations of the Armed Forces of Ukraine in accordance with the trends in the development of the Armed Forces of Ukraine, forms and methods of warfare, and assets of combat actions. To solve this problematic issue, we propose a methodological approach to determining the nomenclature on the example of mobile assets to fulfil the scope of tasks for detecting and assessing nuclear threats. The methodological approach will allow to formulate substantiated practical recommendations regarding the procedure for determining the nomenclature of chemical, biological, radiological and nuclear protection assets. The article presents the nomenclature of nuclear threat detection and assessment, which depends on the scope of detection and assessment tasks and the capabilities of assets used to accomplish these tasks. The materials of the article may be useful for officials of military command and control bodies involved in planning chemical, biological, radiological and nuclear (CBRN) defence during combat actions.