Power supply equipment of nuclear reactor control and protection systems (CPS) is a multifunctional I&C subsystem designed to control reactor power, control and fast shutdown of chain reaction in all operation modes, and support the reactor in a sub-critical state.

Nuclear reactor Control and Protection Systems performs the following functions:

• measure and control of the mean reactor neutron flux;
• measure and control of the period, power, and reactivity doubling time;
• measure and control of neutron flux distribution across the reactor;  
• CPS element remote control;
• CPS element position control;
• automatic regulation of reactor mean power,
• regulation of reactor power distribution;
• automatic reactor removal from sub-critical state;
• reactivity change compensation,
• automatic shutdown of chain reaction in emergencies; 
• automatic reactor power reduction and limitation when process equipment fails;
• estimation of reactor heat power;
• process, preventative, and emergency alarm generation;
• exchange of information with other I&C sub-systems;
• CPS devices operability control, failure alarm, and automatic change-over.

Between 2007 and 2019, 8 CPS power supply equipment sets were designed, manufactured, supplied, and installed for nuclear power plants in the Ukraine and the EU:

• Rivne – 1 system;
• South-Ukraine – 3 systems;
• Zaporizhzhia – 2 systems;