Cold Functional Test of Tianwan Nuclear Power Plant Unit 8 Successfully Completed

On August 3, the cold functional test (hereinafter referred to as the "cold test") of Tianwan Nuclear Power Plant Unit 8, constructed by CNI23, was successfully completed, marking the official transition of the unit from the engineering installation phase to the system commissioning and testing phase, laying a solid foundation for subsequent hot functional test, reactor fuel loading, and grid connection.

The cold test is the first comprehensive commissioning test after a nuclear power unit enters the system commissioning phase and is one of the important milestone nodes in nuclear power plant engineering construction. Its main purpose is to verify the integrity and leak-tightness of the pressure boundary, including primary loop pipeline welds, equipment, and high-pressure sections of connected systems, comprehensively inspect on-site installation quality, and precisely identify potential hazards. It serves as the first comprehensive and systematic "physical examination" of the reactor before its operation.

The Lianyungang Project Department of CNI23 made advance plans and arrangements, establishing a cold test leak detection team and an emergency duty team. After the cold test commenced, team members were stationed in designated zones, fully prepared. During the test, Party members played an exemplary vanguard role, maintaining round-the-clock duty throughout the pressure escalation process, monitoring equipment operating status and sealing performance in real time, and promptly addressing any anomalies to ensure the smooth progress of the cold test in all aspects.

In the next steps, CNI23 will strictly uphold the nuclear safety bottom line, and with a rigorous, prudent, meticulous, and pragmatic work style, complete the hot functional test and fuel loading milestones of Tianwan Nuclear Power Plant Unit 8 to a high standard, fully demonstrating the "Iron Army Spirit".