The steel dome for the nuclear island of Unit 3 of the Haiyang nuclear power plant in Haiyang City, east China's Shandong Province, was successfully lifted into place on Sunday morning.
This represents that construction of the nuclear unit's main building has been basically completed.
The steel dome is the final module of the containment building for Unit 3, with construction now transitioning to the next phase, which involves the installation of the passive safety water tank and other equipment.
The dome measures about 41 meters in diameter and around 11 meters in height with a weight of nearly 1,000 tons.
"The steel dome is the roof of the nuclear unit's containment building, supporting the passive safety water tank above. It provides protection for the nuclear reactor against tsunamis, aircraft collisions, and other threats. It is a critical structure that ensures the integrity and airtightness of the containment building and its internal components," said Zhao Qingshi, a senior engineer with the Shandong Nuclear Power Co., Ltd., the plant's operator.
To ensure the steel dome was positioned accurately, the construction team conducted a full-process rehearsal and thorough checks.
"The Haiyang nuclear power plant uses third-generation passive safety advanced pressurized water reactor technology for all six of its operational, under-construction, and planned power units. In extreme situations, nearly 3,000 tons of water stored in the passive safety water tank will flow down by gravity to cool the containment building of the nuclear island, ensuring safe operation for up to 72 hours without human intervention, in conjunction with other passive safety measures," said Chen Lianfa, a chief engineer with the company.
As the key national projects, Units 3 and 4 of the Haiyang nuclear power plant are expected to enter full operation in 2027.
Once completed, the four nuclear power units at the plant will generate up to 40 billion kilowatt-hours of electricity annually, meeting the power needs of half of Shandong's population.
Steel dome for Unit 3 of China's Haiyang nuclear power plant lifted into place
