Atomstroyexport is building the Tianwan plant in eastern China's port city of Lianyungang under a 1992 agreement. The plant features improved VVER-1000 reactors and K-100-6/3000 turbo generators.
Russia had planned to commission the second reactor in September. The unit, which was tested at 100% capacity last week, will undergo planned maintenance and then be re-tested. Commercial operation of the reactor may begin on schedule in September, Atomstroyexport said.
The second reactor has produced 567,979 MW/h of power since early May.
The first unit was completely commissioned in early June, and experts are preparing a feasibility study for the third and fourth units.