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Steel Dome of Unit 1 at Liaoning Xudabao Nuclear Power Plant Hoisted into Place

On August 28, the steel dome of the nuclear island of Unit 1 at Liaoning Xudabao Nuclear Power Plant, invested and controlled by China National Nuclear Corporation (CNNC)'s China National Nuclear Power, was hoisted into place, marking that the large steel structure module construction of the unit has entered its final stage and laying a solid foundation for achieving the milestone of structural completion of the nuclear island buildings. As the core load-bearing structure of the nuclear island, the steel dome sits atop the steel-plate concrete structure, bearing all loads from the passive containment cooling water storage tank and the structures above. It serves as a critical barrier safeguarding the structural integrity and sealing reliability of the reactor building. The dome is conical in shape, composed of radial main beams, ring beams, steel cladding panels, and a bottom steel platform, with a diameter of approximately 41 meters, a height of 11 meters, and a total hoisting weight of nearly 1,000 tons...

2026-08-28

Safety-level DCS Response Time Testing for Unit 3 of Xudabao Nuclear Power Plant Successfully Completed

Recently, with the final test data confirmed to be accurate, the safety-level DCS (Digital Control System) response time testing for Unit 3 of Xudabao Nuclear Power Plant was successfully completed. All test results met the requirements, with no abnormal equipment actions throughout the entire process, providing reliable instrumentation and control assurance for the subsequent fuel loading and stable operation of the unit. The test lasted 14 days and covered 182 test cases, encompassing more than 1,500 functional tests for reactor trip and engineered safety features systems. As a critical step before fuel loading, the safety-level DCS response time test holds significant reference value for verifying the response performance of the unit's safety systems. To ensure the successful completion of the test, the instrumentation and control team adhered to the work philosophy of "comprehensive preparation, strong collaboration, experience feedback, and pragmatic execution," advancing all tasks in an orderly manner.

2026-08-27

Training Launch for First Batch of Operators for Units 1 and 2 of Xudabao Nuclear Power Plant on Full-Scope Simulator

Recently, the first batch of operator training on the full-scope simulator for Units 1 and 2 of Xudabao Nuclear Power Plant was officially launched. The training program lasts 6 months, with 48 candidate Reactor Operators (ROs) and 24 candidate Senior Reactor Operators (SROs) participating. Centering on the five fundamental operator skills, the training conducts systematic hands-on exercises on the simulator platform, building a reserve of operations personnel for subsequent project construction and safe unit operation. The simulator for Units 1 and 2 can highly replicate the real working environment of the main control room and covers various operating conditions, making it an important platform for operations personnel to enhance their practical capabilities. The training is structured around five fundamental skills—close monitoring, precise control, conservative decision-making, teamwork, and knowledge mastery—integrating job conduct standards and team...

2026-08-27

Main Piping and Surge Lines for Unit 2 of Xudabao Nuclear Power Plant Arrived at Site

On August 22, the main piping and surge lines for Unit 2 of Xudabao Nuclear Power Plant were successfully delivered to the site, laying a solid foundation for the commencement of main piping welding, a Level-1 milestone. The main piping serves as the aorta of the reactor coolant system. Together with the reactor pressure vessel, steam generators, and reactor coolant pumps, it forms a closed loop and pressure boundary. It is not only the core pipeline carrying the circulation and transfer of the reactor coolant but also a critical safety barrier for the nuclear island, making it an essential component of the nuclear island's core equipment. To ensure high-quality and on-time delivery of the equipment, Liaoning Nuclear Power took the lead in coordinating with the general contractor, procurement party, and equipment manufacturers, establishing a three-tier coordination mechanism of "daily reports + weekly meetings + monthly executive meetings" to fully streamline the information chain. Through measures such as optimizing production processes, mobilizing superior production capacity, and implementing continuous operations, all tasks were completed on schedule, ensuring the equipment was shipped and delivered to the site as planned.

2026-08-26

Northeast Regional Office of the Ministry of Ecology and Environment Conducts Construction Quality Dialogue for Xudabao Nuclear Power Plant

Recently, the Northeast Regional Office of Nuclear and Radiation Safety Supervision of the Ministry of Ecology and Environment (hereinafter referred to as the Northeast Office) held a construction quality dialogue with CNNC Liaoning Nuclear Power Co., Ltd. (hereinafter referred to as the Operating Unit) for the Xudabao Nuclear Power Plant, aiming to promote the implementation of nuclear safety responsibilities and ensure the effective operation of the quality assurance system. China National Nuclear Power Co., Ltd. and relevant construction participating units attended the event. The dialogue reviewed the Operating Unit's presentation on quality issues related to nuclear safety-related structures, systems, equipment, and design, systematically identified management shortcomings, analyzed root causes, and developed improvement measures. The Northeast Office pointed out that construction quality issues reflect that various units still have inadequacies in fulfilling nuclear safety responsibilities and quality assurance responsibilities, with insufficiently effective transmission of responsibility pressure. All units must deeply recognize that the Xudabao Nuclear Power Plant is at a critical stage with two reactor types and four units under simultaneous construction, where civil construction, installation, and commissioning tasks overlap, marking a high-risk period for construction quality. The primary nuclear safety responsibility of the Operating Unit must be firmly consolidated, and the corresponding nuclear safety responsibilities of all units must be reinforced.

2026-08-24

Xu Dabao Nuclear Power Plant Completes On-Site Comprehensive Emergency Exercise Before First Fuel Loading of Unit 3

On August 20, Liaoning Nuclear Power conducted an on-site comprehensive emergency exercise before the first fuel loading of Unit 3, honing nuclear emergency response capabilities through practical drills. The exercise was carried out under the full guidance and supervision of the Northeast Regional Office of Nuclear and Radiation Safety Supervision under the Ministry of Ecology and Environment, with a total of over 300 participants from Liaoning Nuclear Power, the supervision company, the general contractor, and various construction units. The exercise successively completed responses across all emergency preparedness levels, including emergency standby, building emergency, site area emergency, and off-site emergency, with plant recovery efforts initiated during the emergency termination phase. The exercise activated key emergency facilities such as the emergency command center, mobile power garage, and fire station, comprehensively testing the organizational command, comprehensive response, and multi-party coordination capabilities of Liaoning Nuclear Power's nuclear emergency system, as well as the reliability and availability of various emergency facilities and equipment.

2026-08-22

CNNC Xiyi Waste Barrel Storage Well Grinding Robot Completes On-Site Testing

Recently, the waste barrel storage well grinding robot developed by CNNC Xiyi officially completed on-site testing in the grinding project of the process BOP (three wastes) storage wells of Units 3 and 4 at Xudabao, marking a substantial breakthrough in the field of automated construction in confined deep-well spaces within the nuclear industry. Waste barrel storage wells feature great depth, small openings, high verticality requirements, and high dust concentrations. Traditional manual grinding requires multiple workers to take turns entering the confined space, resulting in long construction cycles and high risks. The grinding robot developed by CNNC Xiyi is equipped with an XYZ three-axis movement mechanism and a multi-degree-of-freedom motion system with R rotation and W width adjustment, covering a working width of 12 meters with a maximum grinding depth of 5 meters, applicable to the construction of standard waste barrel storage wells across various reactor types...

2026-08-20

Full-Scope Simulator for Units 1 & 2 of Xudabao Nuclear Power Plant Officially Put into Operation

On August 19, the commissioning ceremony for the full-scope simulator of Units 1 & 2 of Xudabao Nuclear Power Plant was held in the simulator main control room. Chen Jin, Secretary of the Party Committee and Chairman of Liaoning Nuclear Power, and Zhang Xiong, General Manager and Deputy Secretary of the Party Committee, attended the ceremony. Gao Shunlong, Secretary of the Party Committee and Chairman of CNNC Wuhan, was invited to attend. The ceremony was presided over by Li Zhusan, Deputy General Manager of Liaoning Nuclear Power. At the ceremony site, attendees jointly watched a video reviewing the simulator construction process, and leaders from both sides jointly unveiled the plaque for the "CAP Simulator Training Center." Gao Shunlong stated that the commissioning of the simulator is an important milestone in project construction and also a brand-new starting point. CNNC Wuhan will make every effort to ensure simulator operation and maintenance support as well as optimization and upgrades, and will take this opportunity to expand the breadth and depth of cooperation with Liaoning Nuclear Power, jointly promoting high-quality project construction.

2026-08-20

First Batch of Non-Safety-Class Main Instrumentation and Control Cabinets for Unit 1 of Xudabao Nuclear Power Plant Successfully Arrived

Recently, the non-safety-class main instrumentation and control (I&C) cabinets for Unit 1 of Xudabao Nuclear Power Plant arrived smoothly and were delivered to the plant site. The main I&C cabinets are core critical equipment for unit control and operation management at nuclear power plants, undertaking full-process functions such as data acquisition, logic calculation, process control, interlock protection, and operation monitoring. They can be regarded as the "central brain" ensuring the safe, controllable, and stable operation of nuclear power units. This equipment features high technical precision, strong integration, and stringent safety classification requirements, offering advantages such as high control accuracy, fast response speed, strong operational stability, and excellent fault tolerance, thereby ensuring safe, stable, and efficient unit operation. To ensure the equipment arrived on schedule, Liaoning Nuclear Power proactively took the lead, coordinated precisely, and efficiently linked the efforts of the general contractor, equipment manufacturer, and design institute, breaking through the collaborative chain across solution optimization, manufacturing, and factory acceptance testing, overcoming difficulties and advancing efficiently. By the end of July, all preparatory work was completed ahead of schedule, and the equipment arrived on time, laying a solid foundation for subsequent project milestones.

2026-08-08

Second Ring of Steel Containment Vessel for Reactor Building of Unit 2 at Xudabao Nuclear Power Plant Successfully Hoisted into Place

At 9:57 on August 4, the second ring of the steel containment vessel (hereinafter referred to as CV Ring 2) for the reactor building of Unit 2 at Xudabao Nuclear Power Plant was successfully hoisted into place. The CV Ring 2 hoisted this time is the third ring segment of the steel containment vessel for Unit 2, with a hoisting weight of nearly 890 tons. During the assembly phase, the installation of multiple discipline items, including annular air ducts, steel structural annular corridors, and U-shaped supports for air turbulence, was completed simultaneously for this module, effectively reducing the risk of cross-operation interference in subsequent internal construction of the nuclear island. This approach fully leveraged the advantages of modular construction and effectively translated the concept of "modularize wherever applicable, prefabricate wherever installable" into tangible engineering outcomes. During the assembly and hoisting of CV Ring 2 for Unit 2, Liaoning Nuclear Power, in collaboration with...

2026-08-04

On-site assembly of the 50MW heat exchange station for Unit 4 of Xudabao Nuclear Power Plant successfully completed

On July 30, the 50MW heat exchange station for Unit 4 of Xudabao Nuclear Power Plant completed on-site assembly, providing solid equipment support for heating in the front plant area this winter. The heat exchange station measures 16 meters in length, 9 meters in width, and 7.4 meters in height, with a total weight of 150 tons. The equipment integrates heat exchangers, circulating water pumps, water treatment devices, and electrical control instruments, forming a complete integrated heating system. The system is arranged on the zero-meter floor of the turbine hall and is responsible for heating the office areas in the front plant area. To ensure the winter heating milestone, the Equipment Procurement Division of Liaoning Nuclear Power, together with the on-site Equipment Department of the engineering company, equipment manufacturers, and installation units, established a special working group, implementing mechanisms such as weekly leadership meetings, daily morning briefings for teams, and daily progress reports, and successively coordinated and resolved issues related to equipment transportation, pipeline hoisting, scaffold erection and dismantling, power supply assurance, and cross-construction coordination, completing all assembly work of the heat exchange station as planned.

2026-07-31

The 30th meeting of the China-Russia Subcommittee on Nuclear Issues was held in Beijing.

On July 24, the 30th meeting of the Subcommittee on Nuclear Issues—held under the mechanism of regular meetings between Chinese and Russian heads of government—took place in Beijing. The meeting was co-chaired by Alexey Likhachev, Director General of Rosa

2026-07-27

The National Nuclear Safety Administration has approved the refueling outline for Units 3 and 4 of the Xudapu Nuclear Power Plant.

The National Nuclear Safety Administration (NNSA) recently issued a notice approving the "Fuel Loading and Refueling Outline (Version B0) for Units 3 and 4 of the Liaoning Xudapu Nuclear Power Plant." The notice bears the reference number Guo He

2026-07-27