On April 15, Zoomlion's ZCC32000 crawler crane helped Tianwan Nuclear Power Unit 8 to successfully lift the dome crown of Tianwan Nuclear Power Unit 8, marking the safe completion of the lifting of the thin-shell steel lining dome of the heaviest nuclear power unit in China.
At 7:39 on the same day, the ZCC32000 crawler crane slowly lifted the dome ball crown weighing 208.84 tons to a height of 63 meters, and then smoothly controlled the upper mouth of the 56.869-meter steel-lined ball belt. According to the construction plan, the dome installation of Unit 8 of Tianwan Nuclear Power Plant is divided into two hoistings, of which the dome belt part has been successfully hoisted in place on March 13 of the same year. The dome crown of Unit 8 was successfully hoisted into place, and the ball crown and ball belt were integrated into one, becoming an important barrier to protect the nuclear reactor.
The containment steel lining dome of the reactor building of Unit 8 of Tianwan Nuclear Power Plant is a hemispherical structure with a diameter of 44 meters, which is divided into two parts, the ball belt and the ball crown, with a total weight of 601.37 tons. The steel lining dome of Tianwan unit 7 and 8 belongs to the heaviest thin-shell steel lining dome in China, and the installation accuracy needs to be controlled at the millimeter level, and the difficulty of hoisting is self-evident, which is also a double test of crane stability and operator operability.
The site adopts the assembly method of assembly construction (the outer side is the ball belt, the inner side is the ball crown), and the main body of the hoisting is the dome ball crown part. The hoisting of the steel dome of the reactor building is an important milestone node in the construction of nuclear power projects. The dome steel lining is the main component of the reactor plant containment, located at the top of the reactor plant, and its main role is to ensure the integrity and tightness of the reactor plant steel lining containment, which plays a key role in radioactive containment.
As a "benchmark project" and "high-quality project", Tianwan Nuclear Power Units 7 and 8 shoulder the important task of optimizing the national energy structure. The two units are expected to be put into operation in 2026 and 2027 respectively, when the total installed capacity of the Tianwan nuclear power base will exceed 9 million kilowatts, providing more than 70 billion kilowatt hours of clean electricity per year, equivalent to reducing carbon dioxide emissions by 57.4 million tons per year.
In the field of nuclear power, Zoomlion's super-large tonnage crawler crane can be seen everywhere, demonstrating the outstanding strength of Zoomlion as a high-end equipment in mainland China, and interpreting Zoomlion's sincere responsibility to build a major national heavy equipment to help build an important national project. In the future, Zoomlion will continue to shoulder the important task of building a strong country and provide more powerful support for the construction of a nuclear power country.