At 8:28 in the morning, the pouring order was issued on time, and concrete was slowly injected into the foundation pit of the nuclear island. The construction of the main project of Unit 4 of San'ao Nuclear Power began. This nuclear power base located in Wenzhou carries the mission of the first Hualong One project in the Yangtze River Delta, and is also a demonstration project that introduced private capital to participate in nuclear power construction earlier in China. With the commencement of Unit 4, the pace of base construction has accelerated, and a series of intelligent construction technologies have been synchronously implemented. While maintaining the safety bottom line, we continue to polish the third-generation nuclear power construction technology, accumulating practical experience for subsequent unit construction.

Project Overview

The San'ao Nuclear Power Unit 4 belongs to the second phase of the project and is the third nuclear power unit started by CGN this year. It was approved by the state on August 19, 2024 and adopts the independent Hualong 1 third-generation nuclear power technology. After the completion of the unit, the annual power generation can reach 9 billion kilowatt hours, which can meet the annual production and living electricity needs of about 1 million people. The total amount of concrete poured in the first tank is about 8820 cubic meters, and the operation is expected to last for 60 hours. The construction team adheres to the goal of getting better one by one, relying on process optimization and intelligent tooling upgrades to ensure construction quality.

intelligent construction

The large-scale application of intelligent equipment is a prominent highlight of this construction project. The project is equipped with an automated production line for steel reinforcement embedded parts, and multiple welding robots and automatic installation platforms are deployed to replace traditional manual operations with automated assembly. The pre embedded parts welding robot horse stool bar welding robot has increased the one-time qualification rate of welding to 90%, and the efficiency has been improved by about 2 times and 4 times respectively. The automatic installation platform of anchor blocks has achieved a one-time qualification rate of 100% for anchor plate installation, and the installation efficiency has been improved by about 11.5 times. This type of practice also provides demonstration samples for the industrialization and intelligence of nuclear power construction. Keywords: San'ao Nuclear Power, Hualong One, Clean Energy

Long-term value

San'ao Nuclear Power plans to build six Hualong One units, which will be implemented in three phases. Four units have been approved, with Unit 1 being put into operation for power generation, Unit 2 completing the first load of nuclear fuel, and Unit 3 carrying out the main structural construction in an orderly manner. After the completion of all units, the annual power generation will exceed 54 billion kilowatt hours, which is close to 80% of the annual electricity consumption of the whole society in Wenzhou. The annual reduction of standard coal consumption will exceed 16.35 million tons, and the reduction of carbon dioxide emissions will be nearly 50 million tons. The base will closely follow the direction of coordinated layout of green electricity and computing power, and continue to provide stable and clean electricity for the low-carbon development and computing power industry development in the Yangtze River Delta.Editor/Li Xiaohua