China and Brazil join pledge to triple global nuclear energy capacity

The Scale of China’s Nuclear Ascovancy

Over the past decade and a half, the landscape of global energy production has shifted toward East Asia. While Western nations have grappled with aging fleets, regulatory hurdles, and massive cost overruns in new builds, China has treated nuclear power as an infrastructure priority akin to its high-speed rail network. According to data from the China Nuclear Energy Association (CNEA) and international monitoring bodies, the country has consistently maintained more than 20 reactors under construction at any given time—a figure that represents roughly one-third of all global nuclear construction activity.

The milestone of adding more capacity than the rest of the world combined since 2011 is particularly striking given the global context. Following the Fukushima Daiichi accident in Japan, many nations initiated "nuclear phase-outs" or imposed stringent moratoriums on new projects. China, after a brief pause for comprehensive safety reviews, doubled down on its program, viewing nuclear energy as an essential baseload companion to its massive but intermittent wind and solar installations. By 2026, China’s operational nuclear capacity is rapidly closing the gap with the United States, which currently holds the world’s largest fleet, though most of the American reactors were built between 1970 and 1990.

A Chronology of Rapid Development

The journey to China’s current dominance began with a period of intense technology absorption, followed by a pivot toward domestic innovation.

2006–2011: The Foundation of Technology Transfer
During this period, China focused on importing foreign designs to learn the complexities of advanced pressurized water reactors. This included the purchase of the AP1000 design from the U.S.-based Westinghouse and the EPR (Evolutionary Power Reactor) from France’s Areva. These projects, such as Sanmen and Taishan, served as the training grounds for Chinese engineers and supply chain managers.

2011–2015: Safety Recalibration and Design Independence
The 2011 Fukushima disaster led to a temporary freeze on new approvals. However, the Chinese government utilized this period to finalize its own "Generation III" design. The result was the Hualong One (HPR1000), a domestic pressurized water reactor designed to meet the highest international safety standards while being more cost-effective and easier to build using local supply chains.

2015–2022: The Hualong One Era
The first Hualong One units began construction at Fuqing and Fangchenggang. During this window, China achieved "serial production" capabilities, meaning it could build multiple units of the same design simultaneously, significantly reducing the "learning curve" costs that plague one-off nuclear projects in the West.

2023–2026: The Expansion to Gen IV and SMRs
By mid-2025, China had moved beyond standard reactors. The Haiyang Nuclear Power Plant in Shandong Province, which recently saw the lifting of major modules for its Unit 3 expansion, exemplifies the shift toward high-efficiency modular construction. Simultaneously, China began operating the world’s first fourth-generation high-temperature gas-cooled reactor (HTGR) at Shidaowan and advanced its Small Modular Reactor (SMR) program, known as the Linglong One.

Supporting Data: By the Numbers

The statistics underpinning China’s nuclear rise highlight a disparity in industrial mobilization compared to the G7 nations.

• Capacity Growth: Between 2010 and 2025, China added approximately 50 gigawatts (GW) of nuclear capacity. In contrast, the rest of the world saw a net capacity stagnation as new builds in countries like the UAE and South Korea were offset by decommissioning in Germany and the United States.
• Construction Timelines: While projects in Europe (such as Flamanville 3) and the U.S. (Vogtle 3 and 4) faced delays of over a decade, China’s average construction time for a Hualong One unit has stabilized at approximately 60 to 70 months.
• Investment: The Chinese government has committed an estimated $440 billion to new nuclear projects over the next 15 years, aiming to have 150 GW of capacity by 2035.
• Energy Mix: Nuclear power currently accounts for roughly 5% of China’s total electricity generation. Government planners intend to double this share by 2030 to help meet the goal of peaking carbon emissions before the end of the decade.

Technological Innovation and the Haiyang Milestone

The recent progress at the Haiyang Nuclear Power Plant in Shandong Province serves as a case study for China’s industrial methodology. On August 4, 2025, a large-scale crane successfully lifted the CB20 module for the nuclear island of Unit 3. This module-based construction technique, which involves pre-assembling large sections of the reactor in a factory setting before transporting them to the site, is a hallmark of modern Chinese nuclear engineering.

Haiyang is also notable for its pioneering work in nuclear heating. The plant provides carbon-free district heating to the surrounding city of Haiyang, replacing coal-fired boilers. This multi-use approach—generating electricity while simultaneously providing industrial steam and residential heat—is a strategy China is scaling across its coastal provinces to maximize the decarbonization impact of every reactor built.

Strategic Motivations and Official Stance

The Chinese government’s push for nuclear power is driven by three primary pillars: decarbonization, energy independence, and economic competition.

The China Nuclear Energy Association has frequently stated that nuclear power is "irreplaceable" for achieving the nation’s "Dual Carbon" goals—peaking emissions by 2030 and reaching carbon neutrality by 2060. Official statements emphasize that while wind and solar are the primary drivers of the transition, nuclear provides the necessary stability to the grid, preventing the type of power shortages that have occasionally hampered Chinese industrial hubs during extreme weather events.

Furthermore, the state-owned China National Nuclear Corporation (CNNC) and China General Nuclear Power Group (CGN) have increasingly focused on the "Belt and Road Initiative." By proving the reliability and cost-competitiveness of the Hualong One at home, Beijing aims to become the world’s preferred exporter of nuclear technology, directly competing with Russia’s Rosatom for contracts in the Middle East, Southeast Asia, and South America.

International Reactions and Global Implications

The rapid expansion has drawn mixed reactions from the international community. On one hand, the International Atomic Energy Agency (IAEA) has praised China’s commitment to nuclear as a climate solution and noted the country’s increasing transparency regarding safety protocols. IAEA Director General Rafael Grossi has previously highlighted that China’s pace of construction is a "lesson for the world" on how to scale clean energy.

On the other hand, Western policymakers view China’s nuclear dominance through the lens of geopolitical competition. The U.S. and UK have moved to limit Chinese involvement in their domestic nuclear projects, citing national security concerns. However, analysts suggest that the "nuclear gap" between China and the West is widening. If Western nations cannot find a way to lower the costs of their own reactors, they may find themselves reliant on Chinese-manufactured components or designs in the future, much like the current global dependency on Chinese solar panels and EV batteries.

Challenges and Future Outlook

Despite the momentum, China’s nuclear sector faces several hurdles. The most significant is the geographical limitation of sites. To date, almost all of China’s reactors are located along its eastern coastline to utilize seawater for cooling. Developing inland nuclear plants remains a sensitive topic due to concerns over water scarcity and the potential impact on the Yangtze and Yellow River systems.

Additionally, the management of spent nuclear fuel remains a long-term challenge. China is currently investing heavily in reprocessing technologies and deep geological repositories, but these projects are in their early stages compared to the rapid pace of reactor construction.

As China continues to add capacity, the next five years will likely see the country surpass France to become the world’s second-largest nuclear power producer. If current trends hold, it will likely overtake the United States for the top spot by the early 2030s. This shift marks a fundamental change in the global energy order, where the center of atomic innovation and industrial might has decisively moved to the East. For the global climate effort, China’s nuclear "assembly line" offers a glimmer of hope for large-scale decarbonization, provided that safety and non-proliferation standards keep pace with the sheer volume of new steel and concrete hitting the ground.