IN A NUTSHELL
  • 🔧 China’s engineering feat at Haiyang includes the precise installation of a massive containment dome, marking a major milestone in nuclear technology.
  • ⚡ The Haiyang plant, once fully operational, will generate 40 billion kWh annually, powering half of Shandong province’s population.
  • 🔒 The CAP1000 reactors, a blend of American design and Chinese innovation, boast advanced passive safety features for enhanced security.
  • 🌍 China’s nuclear strategy is key to achieving carbon neutrality by 2060, reducing coal reliance, and addressing pollution challenges.

The monumental feat achieved by China with its latest nuclear reactor at Haiyang is a testament to the nation’s ambitious stride in nuclear technology. The recent installation of a massive containment dome, weighing as much as 500 elephants, marks a significant milestone in the development of this high-tech facility. This groundbreaking project not only demonstrates China’s engineering prowess but also underscores its strategic commitment to clean energy and environmental sustainability. As the world watches, this endeavor raises questions about the future of global nuclear energy and China’s role in it.

The Engineering Marvel: A Dome Like No Other

The recent completion of the containment dome installation at Haiyang’s reactor 3 is an engineering marvel. This colossal dome, akin to the size of a building, was placed with unparalleled precision. On March 23, 2025, a mammoth 3,200-ton crawler crane lifted the dome, measuring 135 feet in diameter and 36 feet high, and gently positioned it atop the reactor building. The entire operation, executed in under two hours, showcased surgical precision and engineering excellence.

The dome serves as a critical component, providing a third-level anti-radiation barrier designed to prevent any leaks in case of an accident. This achievement not only highlights China’s engineering capabilities but also signifies a leap forward in its nuclear ambitions. The dome marks the completion of the major construction phase for reactor 3, paving the way for the installation of a pivotal component of third-generation nuclear reactors: the passive cooling reservoir.

On March 23, 2025, a 3,200-ton crawler crane gently placed a 41-meter-wide and 11-meter-high steel dome atop the Haiyang nuclear reactor building.

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Powering Shandong: A Vision for the Future

Once fully operational by 2027, the four units at the Haiyang nuclear plant are projected to generate a staggering 40 billion kWh annually. This output will cater to the energy needs of approximately 50 million people, covering half the population of Shandong province. Currently, only units 1 and 2 are operational, having commenced service in 2018 and 2019, respectively, already meeting a third of the region’s residential electricity demand.

With the addition of units 3 and 4, Haiyang will not only become one of China’s most powerful nuclear facilities but also a cornerstone for clean heat production, gradually replacing coal-fired boilers in the Jiaodong Peninsula. This transition marks a crucial step in China’s journey towards sustainable energy solutions and reinforces its commitment to reducing carbon emissions.

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CAP1000: Bridging American Design and Chinese Innovation

The reactors at Haiyang are of the CAP1000 type, a Chinese adaptation of the American AP1000 model developed by Westinghouse. These third-generation plus reactors incorporate advanced passive safety features, inspired by lessons learned from the Fukushima disaster. Since 2002, China has undertaken several such projects across Haiyang, Sanmen, and Lufeng, leveraging the CAP1000’s compact and safe design.

These reactors are engineered to operate without human intervention for the first 72 hours of an incident, relying on passive safety systems. This feature provides a crucial time buffer before critical decisions need to be made, allowing physics to manage initial emergency responses autonomously. The CAP1000 underscores China’s commitment to enhancing nuclear safety while advancing its energy infrastructure.

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Achieving Carbon Neutrality: China’s Strategic Pivot

Nuclear energy plays a pivotal role in China’s strategic plan to achieve carbon neutrality by 2060. Faced with chronic smog and pollution-related health crises, nuclear power offers a viable solution to reduce reliance on coal and transition to a cleaner, more sustainable energy future. With 2 million annual deaths attributed to pollution, according to the WHO, the stakes are high for China.

Facilities like Haiyang contribute significantly to China’s efforts to decrease carbon emissions while ensuring a stable and massive energy output. Nuclear power also complements renewable energy sources by providing a reliable base load, essential for balancing the inherent variability of renewables. China’s nuclear strategy is not only a national priority but also a critical component of its global climate diplomacy.

China’s ambitious nuclear projects at Haiyang exemplify its commitment to leading in clean energy and environmental stewardship. As these developments unfold, the world looks on with keen interest, pondering the implications for global energy dynamics. How will China’s nuclear advancements influence international energy policies and the future of sustainable power generation?

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Rosemary Potter is a Chicago-based journalist for kore.am, covering global issues through the lens of science, policy, entertainment, and cross-cultural dynamics. A graduate of Northwestern’s Medill School of Journalism, she blends investigative depth with a multicultural perspective. Her reporting amplifies voices shaping the future of media, identity, and resilience. Contact: [email protected]

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