February 17，Fujian Zhangzhou Nuclear Power，China's independent third-generation nuclear power“Hualong One”Mass construction of the first unit to complete the hoisting of the outer dome。The 3200-ton super-large Crawler Crane independently developed by Zoomlion undertakes the hoisting task.——ZCC3200NP。
6:38 a.m，As the wind speed measurement meets the standard，The commander in chief at the scene gave the order，ZCC3200NPStart slowly。With the rising sun.，Two hours and 52 minutes.，Through luffing、Lifting Hook、Walk and translate、A series of high-precision actions such as adjustment，The hook of the outer dome falls smoothly and is positioned on the outer containment shell of the reactor building.。
The steel lining of the outer dome is the main steel structure.，Located at the top of the nuclear island，It's about 55 meters in diameter.、Multi-curved composite shell with a height of about 13 meters，It is composed of 89 prefabricated unit components in five layers.，Its main function is to act as a concrete formwork on the top of the outer dome.。
The outer dome is the heaviest module in the Hualong 1 unit.，The body weight is 420 tons，In addition to the locks, the total hoisting weight reached 582 tons.。The overall shape of the outer dome steel lining is an oblate ellipsoid.，The thickness of the wall is only 8 mm.，The lifting height is high，Hoisting is easy to produce deformation，It is required to control the deformation not to exceed 0 during the hoisting process..1 mm。This is important for the coordination between the field commander and the operation technician, as well as the stability of the crane during the lifting process.、Balance and accuracy are great tests.。
In view of the importance and complexity of the lifting of the outer dome，The project team shall sort out the prerequisites before hoisting in advance.，Repeated simulation of lifting route，Rehearse，And carry out security、Special quality inspection。Large diameter of facing outer dome、Thin wall、Deformation and other problems，Special lifting tools and 16 lifting points are provided.，Ensure that the center of gravity is located approximately at the center vertical of the outer dome，Uarantee smooth hoisting。
Due to the compact construction site，The overall hoisting space is small.，ZCC3200NPCrawler Crane first hook avoidance、And then perform luffing rotation、Way to put the rear drop hook in place。At the same time, simulation hoisting shall be adopted before formal hoisting.、Carry out multiple tests in the way of trial hoisting，Ensure accurate positioning of the outer dome of Unit 1。
ZCC3200NPWith Zhangzhou nuclear power all the way，Participated in the completion of most of the lifting tasks，Witnessed and refreshed one nuclear power hoisting record after another.。On August 24, 2021, the overall hoisting of the ring suspension bridge was completed.，It's openZCC3200NPThe first show of nuclear power in Zhangzhou；Hoisting of steam Generator of Unit 1 was completed on September 30, 2021.，5 days 3 hoists，The last lift took only 7 hours and 48 minutes.，Created the most in the world；October 27 of the same yearZCC3200NPFinished the dome（Inside）Hoisting，For the success of Hualong One“Crowned”；Steam Generator in Unit 2 in 2022、And has made great achievements in the hoisting of the dome.，Breaking the record over and over again.。
“Hualong One”It is the only three-generation nuclear power first reactor project completed and put into operation on schedule in the world.，The first four units were completed and put into operation.，It marks that China's nuclear power technology level has leaped to the forefront of the world.。At present, the batch construction in China is progressing smoothly.，It has become one of the three most competitive nuclear power models in the world nuclear power market.。
It is reported that，“Hualong One”Each nuclear power unit generates more than 10 billion kilowatt-hours of electricity annually.，It can meet the annual production and living electricity demand of 1 million people in moderately developed countries.；At the same time, it is equivalent to reducing the consumption of standard coal by 3.12 million tons annually.、Reduce carbon dioxide emissions by 8.16 million tons，It is equivalent to planting more than 70 million trees.。
It is advancing in an all-round way“Double Carbon”Under the strategic objectives，China's nuclear industry development ushers in a new period of strategic opportunities。In the field of nuclear power construction，Zoomlion's super-large tonnage Crawler Cranes can be seen everywhere.，It highlights the strong strength of Zoomlion as a high-end engineering equipment manufacturer in China.，It explains that Zoomlion rejuvenates the country by industry.，Make every effort to build important national projects.。Future。Zoomlion will continue to lead the industry technology，Give play to the industry“The bellwether”Action，Continue to shoulder the heavy responsibility of building a powerful country。
