Implementation of 24 chains for monitoring the activity of a gas heavily loaded with moisture (1 channel per CVI-type unit measures incondensables from the condenser); 16 gamma exposure flow monitoring lines at the pool floors of "BK" fuel buildings and "BR" reactor buildings (2 BK markers and 2 BR markers); 6 ambient gamma equivalent dose rate measurement chains during loading and unloading of new and irradiated assemblies (1 fixed chain per unit and 1 mobile chain on the DMK fuel handling trolley).