December 27, 16:58，Dome of Unit 4 of Hainan Changjiang Nuclear Power Plant Phase II Project in ZoomlionZCC3200NPPrecise positioning under the lifting of crawler crane，It marks that Unit 4 has been fully transferred from the peak stage of civil construction to the installation stage.。This is also the third time that Zoomlion Crane has successfully completed Changjiang Nuclear Power in half a month.“Hualong One”Unit hoisting task。

▲Hoisting site（The pictures are from the official account“Changjiang release”）

The dome in the nuclear island is located on the top of the reactor building.，Its diameter is 46..8 meters，Height 23.4 meters，Total lifting weight up to 518.113 tons。Dome in nuclear island as the third safety barrier of nuclear power unit，It is an important part to ensure the integrity and tightness of the reactor plant.，Therefore, the hoisting of the inner dome has become an important milestone in the construction of nuclear power projects.。

The hoisting of the inner dome this time is“Hualong One”An important task in the construction of nuclear power units，The dome structure needs to be hoisted to a predetermined position and accurately aligned。This process requires a high degree of precision and coordination.，To ensure the stability and safety of the dome structure.。

ZoomlionZCC3200NPThe crawler crane is used in the hoisting process.，The maximum lifting height is about 72 meters.，The positioning height is about 45m.，Through the hook、Luffing、A series of high-precision actions such as walking and hook dropping，The hoisting accuracy shall be controlled at millimeter level.，The whole hoisting process is controllable.、Safe、Orderly，Finally, the inner dome is smoothly dropped over the containment steel-lined cylinder。

▲Hoisting site（The pictures are from the official account“Huaneng Changjiang Nuclear Power”）

It is understood that，Hainan Changjiang Nuclear Power Phase II Nuclear Power Project adopts China's independent intellectual property rights.“Hualong One”Technical route，It is the latest achievement of China's advanced PWR nuclear power technology.，It is also one of the largest commercial nuclear reactors in the world.。The completion of the project will effectively promote the construction of clean energy power generation system in Hainan Island.，At the same time, to ensure China's energy security.、Insist on accelerating the development of energy transformation，Optimizing China's energy structure has a positive effect.。