Liquid lead has been chosen as the coolant for nuclear power plants with inherent safety in Russian Federation. Its physical and chemical properties offer distinct advantages over other types of coolants in FR with inherent safety, but this coolant also possesses certain technological challenges in the course of reactor operation. Heavy liquid metal technology management system for BREST-OD-300 reactor consists of a number of high-end technological devices designed to operate and maintain crucial parameters of lead coolant for decades. Development of these devices required innovative and creative approach as well as strong verification procedures. This presentation will give recent updates on the development of oxygen sensors, mass-exchange devices, hydrogen purification system, coolant filter, hydrogen sensors, which combined present Coolant quality control and management system.