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South China Supervision Station Escorts the Safe and Smooth Transition of Changjiang Nuclear Power Plant Unit 3 to Commercial Operation

Recently, the Changjiang Nuclear Power Plant Unit 3, the first Hualong One nuclear power project constructed by Huaneng Group in the Hainan Free Trade Port, successfully completed a 168-hour full-power trial operation. The achievement of this important milestone marks that the unit has officially met the conditions for commercial operation, and also means that as an important supplement to the clean energy structure of the Hainan Free Trade Port, the project is steadily advancing toward the goal of full commissioning, injecting new vitality into local economic and social development. Looking back at the commissioning process of Unit 3, on April 30 of this year, the unit officially completed its first fuel loading and immediately entered the most critical nuclear commissioning phase. During the commissioning period that lasted for months, every...

2026-09-21

Hainan Free Trade Port's first "Hualong One", Huaneng Changjiang Nuclear Power Phase II Unit 3 is about to be officially put into operation

The first Hualong One nuclear power unit in the Hainan Free Trade Port, Huaneng Changjiang Nuclear Power Phase II Unit 3, is about to officially enter commercial operation. Huaneng Changjiang Nuclear Power Phase II is equipped with China's independently developed third-generation Hualong One nuclear power technology and adopts the country's first fully independently controllable group-level nuclear power production management system. It can deliver more than 9 billion kWh of clean electricity to the Hainan power grid each year. The Huaneng Changjiang Nuclear Power Phase II project plans to build Unit 3 and Unit 4, two units with a single-unit capacity of 1.2 million kilowatts. After the two units are fully completed, the annual power generation can reach 18 billion kWh, enough to meet the electricity demand of one-third of Hainan Province's population. Huaneng Changjiang Nuclear Power Phase II Unit 3 is about to be officially put...

2026-09-17

Huaneng Hainan Changjiang Nuclear Power Unit 4 Completes Cold Functional Test

At 12:50 on September 6, the cold functional test of Unit 4 at Huaneng Hainan Changjiang Nuclear Power was successfully completed, marking the unit's official full entry into the commissioning phase and laying the foundation for subsequent high-quality power generation and grid connection. This project is the first large-scale pressurized water reactor nuclear power project constructed under majority ownership by China Huaneng Group Co., Ltd., and also the first Hualong One nuclear power project in Hainan Province. The cold functional test, also known as the cold hydrostatic test of the primary circuit in a nuclear power plant, is an important milestone in nuclear power engineering construction. It is primarily used to comprehensively verify the integrity and leak-tightness of pressure boundaries, including primary circuit pipeline welds, equipment, and high-pressure sections of connected systems, ensuring the safety and stability of the primary circuit during subsequent operation...

2026-09-08

Danzhou in Hainan Advances "Nuclear Power to Yangpu" and "Nuclear Steam to Yangpu" to Support Zero-Carbon Industrial Park Development

On September 2, the series of themed press conferences for the "15th Five-Year Plan" kickoff (fifth session at the city and county level) — the Danzhou special session was held. A relevant official from Danzhou stated that during the "15th Five-Year Plan" period, Danzhou will focus on building a new-type power system, a new-type energy system, and zero-carbon industrial parks and low-carbon city development, promoting deep integration of clean energy with port-adjacent industries, and striving to become a national demonstration area for new-type power systems. According to the released content, during the "15th Five-Year Plan" period, Hainan Power Grid plans to invest 5 billion yuan in Danzhou to build a coordinated "transmission-distribution-microgrid" three-tier power grid. By 2030, Danzhou will fully establish a layered, zoned, and independently operated grid framework, promote "nuclear power to Yangpu" to achieve local consumption of green electricity with full-chain traceability and verifiability, reducing the regional power carbon emission factor across the entire area to below 0.05 kgCO₂/kWh.

2026-09-04

Hainan Danzhou Plans to Integrate Nuclear Power into Yangpu 220kV Power Grid

On August 21, the "New Advantages of the Free Trade Port 'Showcase' — Danzhou New Energy System Industrial Chain Cooperation Matchmaking Conference" was held in Shanghai. Representatives from nearly a hundred enterprises, investment and financing institutions, industry associations, and professional service organizations attended the event to exchange views on topics such as new energy system development and green, low-carbon industrial transformation, and signed a batch of cooperation agreements on site. Regarding nuclear power-related planning, Hainan Power Grid Co., Ltd. stated that it is accelerating the construction of a new-type power system featuring zoned power supply and tiered operation in Danzhou. According to the plan, by 2030, a relatively independent new-type power grid will take shape across Danzhou, with nuclear power directly connected to the 220kV power grid in the Danzhou-Yangpu area. By then...

2026-08-24

Huaneng Hainan Changjiang Nuclear Power Unit 4 Standardized Demonstration Zone Construction Achieves Phased Progress

To thoroughly implement the safety production directives from higher authorities and effectively enhance the visual management level of safe and civilized construction at Changjiang Nuclear Power Unit 4, on August 16, 2026, the special working group for the safe and civilized construction standardization demonstration zone of Huaneng Hainan Changjiang Nuclear Power Unit 4 went deep into the construction site to conduct a comprehensive inspection and guidance on the creation of the standardized demonstration zone for Unit 4. The inspection was led by company leaders, with the participation of relevant responsible persons from the Engineering Management Department, Safety and Quality Assurance Department, as well as major construction participating units including CNNC 22 and CNNC 5. The working group strictly followed the implementation plan, verifying item by item the setting of signage and labels in the demonstration zone, material fixed-position management, safety protection facilities, environmental sanitation...

2026-08-22

Hainan Changjiang Nuclear Power Unit 4 500kV Reverse Power Transmission Successfully Completed

On August 19, 2026, the 500kV reverse power transmission of Unit 4 of the Hainan Changjiang Nuclear Power Phase II Project was successfully completed, marking another major milestone in the engineering construction of the unit. The 500kV reverse power transmission operation lasted approximately 15 hours. Throughout the power receiving process, equipment operated stably, all parameter indicators were excellent, protection devices acted accurately without error, and system live switching proceeded smoothly, fully achieving the established goal of successful power reception on the first attempt. The realization of this milestone fully verified that the design, manufacturing, and installation quality of the 500kV main switchyard, main transformers, high-voltage auxiliary transformers, and related auxiliary systems of Unit 4 all met the required standards. The Hainan Project Department of CNNC Engineering coordinated design, procurement, construction,...

2026-08-21

The Second Working Meeting of 2026 of the Special Review and Supervision Task Force for the Hainan Changjiang Small Modular Reactor Demonstration Project Convened

To further strengthen the regulatory oversight of the Hainan Changjiang Multi-purpose Modular Small Modular Reactor Science and Technology Demonstration Project (hereinafter referred to as the Small Modular Reactor Demonstration Project), the Nuclear Power Safety Regulatory Department of the Ministry of Ecology and Environment recently organized and convened the Second Working Meeting of 2026 of the Special Review and Supervision Task Force for the Small Modular Reactor Demonstration Project. Representatives from the South China Regional Office of Nuclear and Radiation Safety Supervision, the Nuclear and Radiation Safety Center, the China Machinery Productivity Promotion Center, the operating organization, and the design organization attended the meeting. The meeting focused on dialogue and exchanges regarding unresolved review issues of the Small Modular Reactor Demonstration Project, and reviewed the implementation status of action items from the first task force meeting, the overall project review status, on-site supervision status...

2026-08-18

South China Regional Office of Nuclear and Radiation Safety Supervision of the Ministry of Ecology and Environment Conducts Special Typhoon and Flood Prevention Inspection at Changjiang Nuclear Power Plant

Currently, Hainan has entered the peak season for typhoons and heavy rainfall. Changjiang Nuclear Power Plant, having just withstood the test of Typhoon Maysak, has been hit by continuous heavy rainfall, posing叠加 challenges to on-site safety production from extreme weather. Facing the complex and severe situation, the South China Regional Office of Nuclear and Radiation Safety Supervision of the Ministry of Ecology and Environment (hereinafter referred to as the South China Regional Office) took proactive action and rose to the challenge, promptly organizing a "look-back" special inspection on typhoon and flood prevention work for Units 1 and 2 of Changjiang Nuclear Power Plant. Through comprehensive, multi-level rigorous supervision, the systematic and standardized nature of the operator's natural disaster response work was once again verified. Focusing on key links, consolidating responsibilities. To prevent and mitigate flood season safety risks at the source...

2026-08-12

Huaneng Changjiang Nuclear Power Company Signs Medical Cooperation Agreement with Hainan Western Central Hospital

Recently, Huaneng Hainan Changjiang Nuclear Power Co., Ltd. signed a medical cooperation agreement with Hainan Western Central Hospital, comprehensively strengthening the health and safety defense line for enterprise employees and safeguarding nuclear power production safety. The two parties agreed to leverage the hospital's high-quality medical resources to open a green channel for employees' emergency medical treatment, carry out routine occupational health examinations and health science education, establish a rapid transport and treatment linkage mechanism for sudden injuries or illnesses at the plant site, and efficiently handle various on-site emergency medical situations. After the signing ceremony, relevant personnel from Huaneng Changjiang Nuclear Power Company visited the Emergency Department and Outpatient Building at the Baimajing Binhai Campus, gaining detailed insights into emergency treatment procedures, rescue equipment configuration, and emergency rescue operation models, and engaging in discussions with medical staff on topics such as on-site industrial injury handling and emergency medical response to sudden health events.

2026-08-11

Huaneng Hainan Changjiang Nuclear Power Plant Unit 4 Secondary Loop Combined Hydrostatic Test Successfully Completed

At 04:29 on August 6, 2026, witnessed jointly by Huaneng Changjiang Nuclear Power Company and all participating construction units, the secondary loop combined hydrostatic test of Unit 4 was completed, laying a solid critical prerequisite foundation for the comprehensive implementation of subsequent cold functional tests of the unit. Hydrostatic test curve diagram The secondary loop hydrostatic test is the core critical test following the blasting purging process in the unit's secondary loop system, and constitutes a mandatory acceptance procedure during the construction and installation phase of the Hualong One nuclear power unit. The test primarily targets the steam generator secondary side system, main steam pipelines, feedwater system, auxiliary valves, supports and hangers, and all associated piping, comprehensively verifying the overall structural pressure resistance, weld and flange sealing performance, and...

2026-08-07

Unit 3 of the Huaneng Changjiang Nuclear Power Phase II project—Hainan Province's first "Hualong One" nuclear power project—has been connected to the grid and is generating electricity

On August 1, Unit 3 of the Huaneng Changjiang Nuclear Power Phase II Project, the first large-scale pressurized water reactor nuclear power project under controlling construction by China Huaneng Group Co., Ltd. and the first "Hualong One" nuclear power project in Hainan Province, was connected to the grid, generating Huaneng's first kilowatt-hour of pressurized water reactor nuclear power. This marks that the unit has officially gained the capability to transmit power to the grid, taking a key step toward the goal of commercial operation. The project plans to build two 1.2-million-kilowatt nuclear power units, equipped with China's independently developed third-generation pressurized water reactor nuclear power technology, the "Hualong One." It vigorously promotes the independent design of nuclear power and the localization of equipment manufacturing, and adopts a safety design concept combining active and passive systems, which can significantly improve the reliability and safety of the nuclear power plant. ...

2026-08-03

South China Regional Office of the National Nuclear Safety Administration Conducts Special Supervision and Inspection of Changjiang Units Under Construction

As the South China region enters the main flood season with concentrated typhoons and heavy rainfall, nuclear facilities face significant pressure in resisting meteorological disasters, and safety control responsibilities are critical. To rigorously prevent nuclear safety risks triggered by natural disasters during the flood season and to reinforce the primary responsibility of operating entities for safety production, the South China Regional Office of the National Nuclear Safety Administration (hereinafter referred to as the South China Regional Office) made advance deployments and carried out a special supervision and inspection of typhoon and flood prevention for the Changjiang units under construction in an unannounced manner. This inspection comprehensively verified the effectiveness of control measures, tightened the primary responsibility of the operating entity, and effectively built a safety barrier for nuclear facilities during the flood season. Inspectors went deep into the construction sites of Units 3 and 4 of the Changjiang Nuclear Power Plant and the small modular reactor demonstration project, focusing on checking nuclear...

2026-07-31

The steam-blowing operation for the secondary-circuit main steam piping of Hainan Changjiang Nuclear Power Unit 4 has been successfully completed.

On July 23, the "shock blow" cleaning operation for the secondary-circuit main steam piping of Unit 4 at the Hainan Changjiang Nuclear Power Plant—undertaken by China Nuclear Industry Fifth Construction Co., Ltd.—was successfully completed. The

2026-07-27

The first nuclear steam turbine roll test for Unit 3 of the Huaneng Changjiang Nuclear Power Project (Phase II) was successfully completed.

At 07:56 on July 24, Unit 3 of the Huaneng Hainan Changjiang Nuclear Power Plant—the first large-scale pressurized water reactor (PWR) nuclear power project controlled and constructed by China Huaneng Group Co., Ltd., and the first "Hualong One"

2026-07-27