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Innovating the Safety Review Pathway to Strengthen the Safety Foundation of High-Temperature Gas-Cooled Reactors — National Nuclear Safety Administration Approves Safety Design Criteria for High-Temperature Gas-Cooled Reactors

Recently, the National Nuclear Safety Administration approved the Safety Design Criteria for the High-Temperature Gas-Cooled Reactor of the Jiangsu Xuwei Nuclear Heating and Power Plant (hereinafter referred to as the Safety Design Criteria). This document further refines the specific safety requirements for high-temperature gas-cooled reactors, provides a foundational basis for the safety design of high-temperature gas-cooled reactors, and serves as an important basis for subsequent safety review. This is China's first approved safety design criteria for small nuclear power reactors (hereinafter referred to as small nuclear power reactors), marking that the safety review of small nuclear power reactors has explored a new pathway led by safety design criteria. I. Relevant Background: The Rapid Development of Small Nuclear Power Reactors Calls for Innovation in Review Methods. In recent years, global advanced nuclear energy technologies have been accelerating their evolution...

2026-09-30

UK think tank calls for clear nuclear reactor technology roadmap to support nuclear expansion

On September 8, 2026, UK think tank Policy Exchange released a white paper stating that the UK government needs to more clearly articulate which nuclear reactor technologies it will rely on to advance the so-called nuclear golden age, and to strengthen the supply chain and achieve economies of scale through batch construction. Policy Exchange's Nuclear Enterprise Committee is composed of experts from government, industry, and academia. The committee believes that the UK's civil nuclear strategy is at a critical stage, and related decisions will affect the country's energy system for decades to come. The white paper points out that given that new small modular reactor technologies are still in the early stages of development, the UK government should retain the option of building another large-scale nuclear...

2026-09-09

U.S. Think Tank Recommends European Nuclear Power Adjust Cooling Configurations to Address High Temperatures and Drought

The U.S. Boston-based think tank Clean Air Task Force (CATF) recently stated that extreme heat and drought are placing new pressure on Europe's energy infrastructure, with nuclear power plant operations also affected. The organization believes the nuclear industry needs to place greater emphasis on climate resilience in energy planning and assess the impact of different cooling configurations on long-term plant operations. CATF noted that for nuclear power plants, temperature changes, water resource availability, environmental conditions, and related regulatory requirements over the coming decades could all affect unit operations. The selection of cooling schemes for nuclear power plants should be determined based on site-specific conditions, including local water resource availability, environmental regulations, geographical conditions...

2026-09-03

"High-Precision Analysis Technology and Engineering Application of Multi-Physics, Multi-Scale, Strongly Coupled High-Temperature Gas-Cooled Reactor" Passes Scientific and Technological Achievement Appraisal, Reaching Internationally Leading Level

On August 7, the China Nuclear Energy Association organized a scientific and technological achievement appraisal meeting in Beijing for the high-precision analysis technology and engineering application of multi-physics, multi-scale, strongly coupled high-temperature gas-cooled reactors. Ye Qizhen, academician of the Chinese Academy of Engineering, served as the leader of the project review panel. The expert group unanimously agreed to pass the achievement appraisal, recognizing it as reaching an internationally leading level. Xu Weiqiang, General Manager of the Nuclear Energy Research Institute, attended the meeting, and Liu Wei, Director of the Reactor Engineering Institute, delivered a special report. This achievement was completed through five years of joint research by Huaneng Nuclear Energy Technology Research Institute and Xi'an Jiaotong University, targeting world-class challenges such as strong multi-physics coupling in the core of pebble-bed high-temperature gas-cooled reactors, limited in-core temperature measurement points, and complex bypass flow paths. For the first time internationally, it established...

2026-08-12

Europe's High Temperatures and Droughts Impact Nuclear Power Operations, Ukrainian Expert Says Climate Adaptation Tied to Energy Independence

Recent prolonged high temperatures, droughts, and falling river levels across Europe have put pressure on the operation of some nuclear power plants that rely on river water for cooling. Nuclear facilities in France, Hungary, Romania, and Slovenia have successively experienced power reductions or shutdowns, forcing some countries to ease supply pressure through electricity imports and adjusted consumption arrangements. Katie Huff, a professor of nuclear engineering at the University of Wisconsin-Madison, stated that the impact of climate change on nuclear power operations is mainly reflected in two aspects: first, droughts lower river levels, making it difficult for plants to obtain sufficient cooling water; second, when air and water temperatures are high, nuclear plants face stricter restrictions on discharging warm water into rivers to avoid further affecting the aquatic environment.

2026-08-11

EDF plans to add cooling towers at Golfech nuclear plant to cope with repeated shutdowns due to high temperatures

French utility EDF is planning to adapt the Golfech nuclear power plant in Tarn-et-Garonne to cope with increasingly frequent heatwaves. Since June this year, the plant has been shut down multiple times due to high temperatures, with another outage in early August, highlighting the growing operational pressure on nuclear facilities that rely on river water for cooling in the context of climate change. The direct cause of the Golfech shutdowns is not that the reactors themselves cannot operate, but rather that the Garonne River water temperature is too high. Under regulations dating from 2006, when the daily average water temperature of the Garonne downstream of the plant exceeds 28 degrees Celsius, EDF may reduce unit output or temporarily shut down. This restriction is primarily intended to protect the river ecosystem...

2026-08-11

French nuclear power sets record unavailability rate due to high temperatures and drought, one-sixth of capacity constrained

France's nuclear power system is under exceptional strain. Affected by persistent high temperatures and low river water levels, nuclear reactors operated by French utility EDF have recorded unprecedented unavailability. According to an AFP tally based on data published by EDF since 2015, on the afternoon of Sunday, August 9, 2026, the nuclear capacity shortfall caused by drought and extreme heat reached 15.6% of installed capacity, equivalent to roughly one-sixth of France's nuclear power capacity being temporarily unable to supply electricity normally. The cause of this disruption is not simply equipment failure, but is closely linked to the natural environment on which nuclear plant operations depend. Many nuclear plants draw water from rivers for cooling; when river levels are too low or water temperatures too high, the...

2026-08-11

France's Golfech Nuclear Power Plant Reconnected to Grid After Shutdown Due to High Temperatures

French utility EDF (Électricité de France) announced that the Golfech nuclear power plant, located in the Tarn-et-Garonne department, has been reconnected to the grid. Unit 2 of the plant was restarted around noon on August 7, following a forced shutdown on July 29 due to high-temperature weather. At the time of the shutdown, Unit 1 was in the maintenance and refueling phase, making the interruption of Unit 2 more impactful on plant operations. The direct cause of the shutdown at Golfech was that the water temperature of the Garonne River reached regulatory limits. According to relevant regulations, when the daily average water temperature of the Garonne River exceeds 28 degrees Celsius, the plant must reduce reactor power or temporarily cease operations. Since the nuclear plant needs to draw water from the river for...

2026-08-08

X-Energy and Centrus Sign HALEU Supply Agreement, Accelerating U.S. Advanced Nuclear Fuel Supply Chain

X-Energy and Centrus Energy have signed a low-enriched uranium and high-assay low-enriched uranium supply agreement, marking a more concrete commercialization phase in fuel assurance for U.S. advanced nuclear reactors. Under the agreement, Centrus will provide uranium enrichment services at its American Centrifuge Plant in Pike County, Ohio, with the HALEU to be supplied to X-Energy's fuel subsidiary TRISO-X for the production of TRISO-coated particle fuel at its Oak Ridge, Tennessee fuel fabrication facility, serving the Xe-100 high-temperature gas-cooled small modular reactor. The significance of this agreement lies not only in the supply itself but also in its phased advance payment arrangement. X-Energy will support Centrus through advance payments...

2026-08-07

US Firm Standard Nuclear's Two New TRISO Fuel Plants to Enter Production by 2026, Expanding Independent US Capacity

US nuclear fuel manufacturer Standard Nuclear announced that "major construction is substantially complete" at its two TRISO fuel production facilities, SN-TN in Tennessee and SN-ID in Idaho, and that the US Department of Energy has approved the Preliminary Documented Safety Analysis (PDSA) for both plants. The two facilities share an identical design and are expected to sequentially commence commissioning and licensing before the end of 2026. Authorized under the DOE's "Fuel Line Pilot Program," each plant will initially produce up to 1 metric ton of uranium (MTU) per year of TRISO fuel, with a combined ramp-up target of 5 MTU/year in the long term, forming a tiered supply alongside the company's existing SN-0 facility (0.5 MTU/year) operating in Oak Ridge. Standard Nuclear describes itself as "the only independent TRISO fuel manufacturer in the US," having been restructured from the fuel business of Ultra Safe Nuclear following its bankruptcy in 2024 (with USNC's reactor business acquired by Nano Nuclear). Its operations cover power reactor fuel as well as space and defense radioisotope power sources. The company also participates in the DOE's Fuel Line Pilot and Surplus Plutonium Disposition programs, has been allocated HALEU by the DOE for fuel fabrication, and has established a joint-venture TRISO line at Framatome's NRC-licensed fuel facility in Richland, Washington.

2026-08-06

EDF's Performance Declines as Nuclear Plants Affected by High Temperatures

EDF faced pressure in its first-half results, with net profit down 4.4% year-on-year to €5.2 billion. Despite an increase of approximately 8 TWh in French nuclear output, revenue still fell 3.3% to €57.45 billion. The company's half-year EBIT stood at €14.1 billion, with total electricity generation of 262.1 TWh, of which French nuclear plants contributed 189.9 TWh. Meanwhile, EDF also bore an additional €500 million in taxes, mainly related to the contribution on excess profits. Weak market prices reduced the value of electricity sold by EDF, while the company, fully state-owned, needs to fund capital-intensive industrial projects. As of end-June, EDF's net debt reached €51.5 billion, flat compared to the level at end-2025...

2026-08-01

Hungary's Paks Nuclear Power Plant Faces Full Shutdown Due to Record Low Danube Water Level

Affected by persistent drought and high temperatures, the water level of the Danube River at the Budapest section dropped to 23 cm (fixed datum reading, a record low), restricting cooling water intake at the Paks Nuclear Power Plant. Starting Wednesday, July 29, Unit 3 was the first to be shut down; the operator, MVM Paks Nuclear Power Plant Ltd, subsequently stated on its official website that all four units would inevitably be disconnected within the next 24 to 72 hours, with power generation coming to a complete halt. MVM explained that the existing water volume of the Danube is still sufficient to cool the reactors, but the intake pumps can no longer draw water because the riverbed is exposed and the pump inlets are too far from the water surface—an equipment failure rather than an absolute shortfall in cooling water volume. To this end, the Hungarian side deployed 4 pumping barges and 2 floating cranes near the plant as an emergency measure, but with water levels expected to continue falling, a preventive full shutdown remains unavoidable.

2026-07-31

France's Golfech nuclear power plant shut down for third time this summer due to high temperatures

France's Golfech nuclear power plant has been shut down three times this summer. Located approximately 100 kilometers northwest of Toulouse, the plant is operated by Électricité de France (EDF). On the evening of July 29, one of its reactors was shut down again due to extreme heat. EDF had previously shut down the reactor twice, from June 23 to July 3 and from July 9 to 27, to prevent cooling water discharged into the Garonne River from exceeding the 28-degree Celsius limit set by a 2006 decree. The Golfech nuclear power plant is located in the Tarn-et-Garonne department, and its cooling water is discharged into the Garonne River. Currently, another reactor at the plant is also shut down for maintenance and refueling. France has experienced its fourth heatwave since the start of summer...

2026-07-31

Shidaowan Nuclear Power Company Successfully Completes Member Support Activity for Predictive Maintenance and Equipment Condition Monitoring

On July 24, Shidaowan Nuclear Power Company successfully completed the member support activity for predictive maintenance and equipment condition monitoring, laying the foundation for further optimizing the predictive maintenance and equipment condition monitoring management and technical systems of the High-Temperature Gas-Cooled Reactor (HTGR) Demonstration Project, and promoting the transformation and upgrading of the equipment management model. The member support activity, lasting five days, was organized by the Nuclear Power Branch of the China Nuclear Energy Association, aiming to leverage the expertise of industry experts to drive the transformation of the equipment management model of the HTGR Demonstration Project from breakdown maintenance and periodic maintenance to data-driven predictive management, thereby strengthening the foundation of nuclear safety and operational economy. The expert team for this activity was led by Chen Lunshou, former Deputy Chief Engineer of Sanmen Nuclear Power Co., Ltd...

2026-07-30