A concept of tritium-breeding monitoring in the DEMO reactor is discussed. A system for experimental estimation of the tritium-breeding ratio and the tritium-breeding dynamics in a helium-cooled experimental breeding submodule (EBSM) of the International Thermonuclear Expeimental Reactor is proposed. A schematic diagram of the EBSM system and the design of its units are considered. Operation of the system in different modes is discussed. A pneumatic method is proposed to deliver the detectors to the tritium-breeding zone of the EBSM and to extract the detectors by using tritiumbreeding channels. The channels are connected to the EBSM and to an operating zone. The results of the channel-cooling calculation carried out under nominal operating conditions of the EBSM (a plasma pulse) and the calculation of parameters of tritium detector transportation are presented in the paper.
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