Devices and Methods for Impurities Control in Heavy Liquid Metal Heat Carriers

One of the key problems in the operation of fast neutron reactors cooled by a heavy liquid metal coolant is the formation and accumulation of various deposits. These deposits complicate the process of equipment restoring during repair work. This leads to a shorter work life and a lower efficiency of the equipment as a whole. Except of core destruction cases, the processes of formation and movement of impurities in a circuit with a heavy liquid metal coolant proceed rather slowly over time. So that time from request to receiving of complete information about the system status is an important aspect of its work. The purpose of the work was to control the composition, quantity and condition of impurities in all possible states (present as a solution in the heavy liquid metal coolant, passivated conglomerates on the inner surfaces of the contour, as well as on the free surface of the heavy liquid metal coolant). As well as the development of a set of devices that allows controlling of these processes. The paper considers the processes of mass transfer in the circuit, taking into account the influence of the resulting impurities affecting the state of the system. Sectoral control systems are proposed for use, which make it possible to quickly and reliably monitor impurities and their composition