The No. 2 Unit of Zhangzhou nuclear power plant, located at the world's largest Hualong-1 base, completed hot functional test on Tuesday, paving the way for fuel loading and connection to the state grid.
The Hualong-1 reactor is a domestically developed third-generation nuclear reactor design, representing a major milestone in China's homegrown nuclear technology.
The hot functional test is a crucial step in the commissioning process.
The test simulates the actual operating conditions of a nuclear power plant as closely as possible and comprehensively verifies the performance of equipment and systems in both the nuclear and conventional islands under thermal conditions.
"Hot functional test of the No. 2 Unit of Zhangzhou nuclear power plant has been completed. Subsequently, we will proceed with fuel loading and grid connection as planned. According to the schedule, the No. 2 Unit will enter commercial operation in the fourth quarter of this year," said Mei Bingyun, chief engineer of China National Nuclear Corporation Zhangzhou Energy Co., Ltd.
According to plan, the Zhangzhou nuclear power plant will eventually comprise six million-kilowatt-grade nuclear power units.
The No. 1 Unit has been put into commercial operation. Units No. 3 and 4, planned for the second phase of the project, have seen their construction started in 2024 and been undergoing a critical stage.
After full production, the six units will have a total installed capacity of approximately 7.2 million kilowatts. Each unit is expected to generate over 10 billion kilowatt-hours of clean electricity annually, making a significant contribution to China's low-carbon energy goals. "Hualong-1 has become the world's most widely deployed third-generation nuclear technology, both in operation and under construction. This marks that China's nuclear technology and overall competitiveness have reached the front ranks globally," Mei said.
No. 2 Unit of world's largest Hualong-1 reactor base completes hot functional test
The hardcore technology of drones and de-icing robots has elevated the efficiency of clearing ice from power lines to a new level in east China's Anhui Province.
Deep in the Dabie Mountains of Anhui, four significant power transmission corridors are located. Their stable operation is vital for ensuring the electricity security of the entire Yangtze River Delta area.
A sudden cold wave hit the Dabie Mountains area before the this year's Spring Festival. To ensure smooth electricity supply during the holiday, more than 20 inspection teams assembled immediately and set out for power inspection.
Despite being only about 600 meters above sea level, the combination of rain, snow, humidity, and low temperatures in the deep mountains can easily lead to ice accumulation on the power lines.
The challenging terrain made it impossible for vehicles to navigate. The inspection workers had to carry their equipment, carefully advancing along the slippery mountain paths. Eventually, they reached a high-voltage tower. Standing over 60 meters tall, the tower nearly disappeared into the swirling mist.
A staff member skillfully operated a drone to begin their inspection of the tower. In less than five minutes, the drone captured over 20 close-up photos of the tower, demonstrating remarkable efficiency despite the low visibility conditions.
"What do we do if the fog is too thick and we can't see the tower? In such cases, we rely on our autonomous inspection method, allowing the drone to fly close to the tower on its own. This approach enables us to clearly capture images of many components, such as checking for ice or snow accumulation on the tower. The photos are then instantly transmitted back to our system, where the large model can annotate each image and identify any potential defects on the tower," said Lei Jiajie, a staff member from Unmanned Aerial Vehicle (UAV) Inspection Center, State Grid Anhui Electric Power Co., Ltd.
Airlifted by drone, a de-icing robot can clear ice from power lines efficiently while crews operate safely from the ground, keeping maintenance personnel safe in icy weather.
"This is our de-icing robot. It is placed on the ground wire and autonomously chips away at the ice. It is operated using a remote control," said Lei.
By using the robot, the entire 20-meter-long wire, covered in ice, was completely cleared in about one minute.
"In the past, we used to climb the tower and use a rod to strike the wire directly from above, causing it to vibrate down, and that was the traditional method. Today, these young people are incredible. They can operate everything with ease," said Bao Yuanchun, a high-voltage line maintenance technician from State Grid Lu'an Power Supply Company.
In the evening, the staff returned to the lab with over 400 photos captured by the drone. Within just five minutes, all potential line hazards were identified by artificial intelligence.
At this inspection center, young faces like Lei's are everywhere. This group of new power workers, with an average age of under 30, not only traverses mountains to assemble towers and lay power lines, but also operates drones and AI models to collect data and manage intelligent power dispatch.
These young power workers said that their next step is to refine their skills further, stay in step with the times, and advance alongside technological innovations.
Drone, robot take powerline de-icing efficiency to new level in China
