This is the operation from which we can start a countdown to power unit start-up. Before the cleanout Rostov NPP Plant Manager thanked all the fixers, adjusters, operating personnel who provided the execution of one of the key pre-commissioning events within the target time frame. “In fact, this is the end of assembly works and the start of major pre-commissioning works at power unit No 4”, Andrey Salnikov said. The cleanout process to the open reactor is executed by the personnel of operating power unit of Rostov NPP and the specialists who carried out the assembly of the systems, it will continue for 40 days. It is planned to put Rostov NPP’s power unit No 4 into operation in 2017.