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China Xuwu Unit 3 Plans First Concrete Pour for Nuclear Island

Recently, Unit 3 of the Phase I project of the Jiangsu Xuwu Nuclear Heating and Power Plant has finalized the plan for the first concrete pour of the nuclear island, marking an important preparatory milestone for the project construction. The unit is constructed and operated by CNNC Suneng Nuclear Power Co., Ltd., which is controlled and invested by China National Nuclear Power Co., Ltd. The project intends to advance the main construction of the nuclear island through this engineering milestone, while the actual implementation status remains subject to confirmation by subsequent engineering information. Regulatory licensing has provided the prerequisite for the relevant construction. The National Nuclear Safety Administration completed the review of the application documents, issued a construction license to Unit 3, and through on-site readiness supervision and inspection, confirmed that the conditions for the first concrete pour of the nuclear island foundation are met, allowing the relevant work to proceed. The license...

2026-11-06

Two Types of I&C Equipment for China's Zhangzhou Nuclear Power Unit 3 Pass Acceptance Synchronously

Recently, the "Longlin" safety-class and "Longqi" non-safety-class digital control system (DCS) equipment for Zhangzhou Nuclear Power Unit 3 completed factory acceptance synchronously. China Nuclear Power Engineering Co., Ltd., as the purchaser, organized and advanced the acceptance work for the two types of equipment, verifying the compliance of equipment technical specifications with design and engineering application requirements, laying the foundation for subsequent supply and on-site installation and commissioning. DCS performs monitoring, control and protection functions for relevant systems and equipment in nuclear power plants, and is an important component of the unit's instrumentation and control system. Safety-class and non-safety-class systems respectively undertake tasks of different safety levels, with different emphases in technical requirements, quality assurance and verification procedures. This synchronous org...

2026-11-05

Bruce Unit 4 Refurbishment Sets Record, Schedule Significantly Ahead of Unit 3

Recently, Bruce Power of Canada announced that the Major Component Replacement (MCR) project at Bruce Unit 4 has reached a key milestone. The installation efficiency of the unit's 480 calandria tubes set a new record, with overall progress further accelerated compared to the previous Unit 3. As a core life extension project for the CANDU heavy water pressure tube reactor, the MCR project encompasses the systematic removal and replacement of key core components, representing a major infrastructure undertaking spanning multiple years and aimed at extending the reactor's operational life by 30 to 35 years. During this construction phase, a six-axis robotic tooling system jointly developed by Bruce Power...

2026-10-16

Hydraulic pressure test of containment penetration protection sleeves for Haiyang Nuclear Power Unit 3 in China succeeds on first attempt

Recently, the hydraulic pressure test of the containment penetration protection sleeves for the main steam and main feedwater pipelines of Haiyang Nuclear Power Unit 3 of State Power Investment Corporation (SPIC) Shandong Nuclear Power was completed, with all four sleeves passing the test on the first attempt. The protection sleeves are an important part of the containment pressure boundary and can safeguard the bellows expansion joints under abnormal pipeline conditions. It is understood that this test was relatively difficult. The sleeves had long been embedded in the containment, the original pipelines could not be damaged, and the on-site space was narrow, making it impossible to install the tooling. To address these challenges, the production preparation project team innovatively adopted the process of "removing the original guard plate + welding flanges to build a pressure chamber," and joined forces with the design institute and equipment manufacturer to form a special team, conducting multiple simulation verifications and reviewing...

2026-10-12

Beloyarsk NPP BN-600 Unit 3 Reaches Full Power After Maintenance, New Liquid Sodium Electromagnetic Pump Commissioned

Recently, Unit 3 of the Beloyarsk NPP equipped with the BN-600 reactor reached 100% power after scheduled maintenance. More than 1,000 employees participated in the maintenance, from the nuclear power plant's maintenance department, Uralatomenergoremont, and other contracting organizations. It is understood that the main work during the outage included: completing the refueling of 120 fuel assemblies containing nuclear fuel, performing major overhaul of the reactor facility and replacing 9 guide tubes of the control and protection system, as well as performing major overhaul of generator No. 6. One of the most important modernization efforts was the replacement of the electromagnetic pump (EMN, electromagnetic pump) used for transporting liquid metal sodium in the secondary loop.

2026-10-13

3-meter-wide hole found at bottom of Unit 3 reactor pressure vessel at Fukushima Daiichi Nuclear Power Station: molten nuclear fuel burned through the base plate, TEPCO advances evaluation of debris removal project

The latest investigation data released by Tokyo Electric Power Company (TEPCO) shows that an irregular circular hole with a maximum diameter of 3 meters exists at the bottom of the reactor pressure vessel (RPV) of Unit 3 at the Fukushima Daiichi Nuclear Power Station (Fukushima No. 1 NPP). This is the first time since the March 11, 2011 Great East Japan Earthquake triggered a tsunami and caused core meltdown that TEPCO has determined the specific shape and dimensions of the damaged bottom of the pressure vessel among the three reactors that experienced meltdown. The conclusion is based on image data obtained by a technical team in March this year using palm-sized micro-drones to conduct 21 flight surveys inside the containment vessel of Unit 3. Based on the multi-angle...

2026-10-11

Concrete pouring for the turbine pedestal of the conventional island of Guangdong Taipingling Unit 3 completed successfully

From September 25 to 27, 2026, the Taipingling Nuclear Power Project construction team completed the mass concrete pouring for the turbine pedestal of the 3BMX conventional island of Unit 3. This construction involved a cumulative concrete pour of 2,946 cubic meters and the consumption of 550 tons of rebar, with the installation precision of embedded parts reaching the millimeter level, marking a phased breakthrough in the key construction path of the conventional island of Unit 3 and laying an important foundation for the subsequent civil construction handover for the turbine foundation and the advancement of the mainline conventional island works. To ensure the successful completion of the pouring milestone, the Taipingling Nuclear Power Project construction team adhered to the principle of planning ahead and coordinated deployment, quickly establishing a special task force to focus on key...

2026-10-09

Inner Dome Concrete Pouring of Zhangzhou Nuclear Power Unit 3 Completed

On September 30, as the last batch of concrete was successfully poured into the formwork, China Nuclear Industry 24 Construction Co., Ltd. successfully completed the concrete pouring of the inner dome of the reactor building of the Hualong One Zhangzhou Nuclear Power Unit 3. The achievement of this key milestone marks the full completion of the civil construction of the inner containment for this unit, laying a solid foundation for the subsequent prestressing construction of the containment and the installation of core nuclear equipment. As an important safety barrier of the Hualong One independent third-generation nuclear power technology, the inner dome is located at the top of the nuclear island, and its core function is to ensure the integrity and absolute leak-tightness of the reactor building and prevent the leakage of radioactive substances. Faced with nuclear construction technical challenges such as the complex curved surface structure of the dome and the high difficulty of high-altitude operations, the Zhangzhou Nuclear Power Project Department...

2026-10-02

The pressurizer of Unit 3 of the Zhangzhou Nuclear Power Plant has been hoisted into place.

At 19:03 on September 20, the pressurizer of Unit 3 of the Zhangzhou Nuclear Power Plant was hoisted into place. During this pressurizer hoisting operation, the pressurizer was horizontally lifted to the +16.5m platform by a gantry crane, transported and towed by a heavy-duty vehicle into the reactor building, then turned and erected by the polar crane, and finally hoisted into place. The pressurizer is one of the core main equipment items of the nuclear island reactor coolant system, and its main function is to undertake primary loop pressure control and overpressure protection, among other duties. When the temperature and pressure inside the reactor fluctuate, the pressurizer can maintain the temperature and pressure inside the reactor within a safe range by adjusting the flow rate and temperature of the coolant water, thereby ensuring the safe and stable operation of the reactor. At the same time, the pressurizer is crucial for ensuring the power generation efficiency of the unit and maintaining stable operation, and is key equipment for the safe operation of nuclear power units.

2026-09-21

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

Pressurizer of Zhangzhou Nuclear Power Unit 3 Hoisted into Place

At 19:03 on September 20, the pressurizer of Zhangzhou Nuclear Power Unit 3 was hoisted into place. During this pressurizer hoisting operation, the pressurizer was horizontally lifted to the +16.5m platform by a gantry crane, transported by a heavy-duty vehicle into the reactor building, then turned and erected by the polar crane, and finally hoisted into place. The pressurizer is one of the core main equipment items of the nuclear island reactor coolant system, and its main functions include primary loop pressure control and overpressure protection. When the temperature and pressure inside the reactor fluctuate, the pressurizer can maintain the temperature and pressure within the reactor in a safe range by adjusting the flow rate and temperature of the coolant water, ensuring the safe and stable operation of the reactor. At the same time, the pressurizer is...

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

South Korea to Reconsider Accident Management Plans for Four Units at Gori and Hanbit

On September 11, 2026, the Nuclear Safety and Security Commission of South Korea held its 14th meeting of 2026 to review the accident management plans and operating change license applications submitted by Korea Hydro & Nuclear Power (KHNP) for Gori Nuclear Power Plant Units 3 and 4 and Hanbit Nuclear Power Plant Units 1 and 2. The meeting failed to reach a final conclusion and decided to refer the relevant agenda items to the next meeting for continued deliberation. The accident management plan mainly includes the scope of nuclear power plant accident management, management facilities, management strategies, and training programs. For nuclear power units with long operating lives, approval of this plan is generally regarded as an important prerequisite for subsequent discussions on continued operation licenses....

2026-09-12

Unit 3 of Finland's Olkiluoto Nuclear Power Plant automatically disconnected from the grid due to a technical fault

On September 10, several hours before the start of a planned shutdown for maintenance, Unit 3 of Finland's Olkiluoto Nuclear Power Plant automatically disconnected from the grid due to a technical fault detected in the steam generator. The plant operator, Teollisuuden Voima Oyj (TVO), said that at the time of the incident, Unit 3 was gradually reducing power as planned and was already operating at extremely low power. The automatic disconnection occurred earlier than the originally scheduled grid disconnection for maintenance. TVO stated that all plant systems were operating normally and that the event had no impact on nuclear safety. The Olkiluoto Nuclear Power Plant is located on the Olkiluoto Peninsula along the coast of the Gulf of Bothnia in the Baltic Sea in Finland. The plant has three operating units, of which Unit 3...

2026-09-11

Safety review items for Shimane Nuclear Power Plant Unit 3 confirmed, operation planned for 2030

The Nuclear Regulation Authority (NRA) of Japan conducted a safety review of Shimane Nuclear Power Plant Unit 3 on September 10. This review is a necessary procedure before the unit can be put into operation. Chugoku Electric Power Company of Japan has been constructing Shimane Nuclear Power Plant Unit 3 since 2005 and has been undergoing NRA review since 2018. At the review meeting that day, Chugoku Electric Power Company gave explanations regarding earthquake, tsunami, and severe accident response measures for Unit 3. According to the meeting, all review items were confirmed on September 10. Next, Chugoku Electric Power Company will submit a revised document incorporating the relevant content discussed at previous review meetings. The NRA is expected to prepare a draft review report based on this...

2026-09-11