On 30 September 2018, 14:27 (Beijing time) the reactor plant of Tianwan NPP unit No 4 that is under construction in China with the technical assistance of ROSATOM Engineering Division, has been brought to minimum controllable level of power. This is the final stage of the first criticality procedures. 

The first criticality procedures of power unit No.4 commenced on 25 August 2018 when upon completion of all preparatory works the first fuel assembly (FA) was installed into the reactor. Totally 163 fuel assemblies were loaded into the reactor. All the works were performed in automatic mode in compliance with the safety rules and ahead of schedule.