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Investigation to Be Conducted into Emergency Diesel Generator Failure at Unit 6 of Japan's Kashiwazaki-Kariwa Nuclear Power Plant

Tokyo Electric Power Company announced that it will investigate the failure of the emergency diesel generator at Unit 6 of the Kashiwazaki-Kariwa Nuclear Power Plant in Niigata Prefecture, Japan. The unit was restarted after 14 years of shutdown and resumed commercial operation in April this year. According to Tokyo Electric Power Company, in July this year, workers discovered that water had mixed into the lubricating oil of the emergency diesel generator at Unit 6. Subsequent inspections confirmed that there was a water leak in the cylinder head, a component of the generator engine. The company therefore determined that the unit currently does not meet the operational safety specification requirements. Tokyo Electric Power Company stated that it plans to complete the relevant repair work by September 19. If the repair cannot be completed by then, the cause of the failure will be further investigated, and measures may include shutting down the reactor for inspection.

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

Decommissioning of Unit 1 at Japan's Ikata Nuclear Power Plant Proposed to Move to Phase 2

On the 11th, Ichiro Ogi, Mayor of Yawatahama City in Ehime Prefecture, Japan, reported to the prefectural government that he has agreed to the decommissioning work of Unit 1 at the Ikata Nuclear Power Plant of Shikoku Electric Power Company entering Phase 2. Ichiro Ogi requested that Shikoku Electric Power thoroughly implement relevant measures during the subsequent decommissioning process to prevent the spread of radioactive materials, control the radiation exposure dose of workers, and protect the surrounding environment of the nuclear power plant. Unit 1 at the Ikata Nuclear Power Plant ceased operation in 2016, and since 2017, decommissioning work has been carried out in four phases, with a planned duration of more than 40 years. Currently, the decommissioning work of this unit is still in Phase 1. According to the safety agreement arrangements, Shikoku Electric Power has submitted a prior consultation application to the Ehime Prefectural Government...

2026-09-11

Chubu Electric Power considers withdrawing Hamaoka nuclear plant restart review application

Chubu Electric Power Company (CEPCO) is considering withdrawing its restart review application for Units 3 and 4 of the Hamaoka Nuclear Power Plant. The plant is located in Omaezaki City, Shizuoka Prefecture, Japan, and it was previously revealed that seismic design data related to the restart review was suspected of falsifying "design basis ground motion" data, making the ground motion amplitude in the submitted materials lower than originally expected. On the morning of the 11th, Chubu Electric Power announced that it had received a report submitted by an investigation committee composed of external lawyers. The committee was commissioned by Chubu Electric Power to investigate the causes and process of the seismic design data issue at the Hamaoka Nuclear Power Plant. Chubu Electric Power President Shingo Hayashi and others plan to hold a press...

2026-09-11

CGN's 33 in-operation nuclear power units achieve RMB-denominated pricing and settlement for operational period insurance

On September 10, the "CGN In-Service Nuclear Power Plant Operational Period Insurance Project Co-Insurance Agreement" was signed in Shenzhen. The agreement achieves RMB-denominated pricing and settlement for major types of nuclear power plant operational period insurance, changing the convention of China's nuclear insurance market's over thirty years of primarily relying on foreign currency transactions. Nuclear insurance is an important type of insurance for ensuring the safe and stable operation of nuclear power units. Due to the enormous insured amount of a single policy, it typically requires joint underwriting by hundreds of insurance companies both domestically and internationally, and is regarded by the insurance industry as one of the most special and complex types of insurance. Since China's first nuclear power plant operational insurance policy——the Daya Bay Nuclear Power Plant operational insurance policy——was issued in 1993, China's nuclear power industry has long followed mature foreign models...

2026-09-11

NASA's Chandra Telescope Discovers 84 Mysterious Supersoft X-ray Sources

NASA's Chandra X-ray Observatory recently announced that researchers using the observatory's publicly available observation data discovered 84 mysterious celestial objects known as supersoft X-ray sources in 6 galaxies. The related research was published in Nature Astronomy. Image credit: X-ray: NASA. These objects emit X-rays with unusually low energy and may be accompanied by strong high-energy ultraviolet radiation. The research team stated that the behavior of these objects is clearly different from previously observed known celestial bodies and may provide new clues for explaining the origin of Type Ia supernovae and the electron-stripping mechanism in the intergalactic medium. The 6 galaxies covered by this search include two spiral...

2026-09-10

HD Hyundai Heavy Industries to Invest KRW 238.6 Billion in Dedicated Plant for Manufacturing Major SMR Equipment

HD Hyundai Heavy Industries announced on September 10 that it will invest KRW 238.6 billion to build a dedicated plant for manufacturing major equipment for small modular reactors (SMRs). The plant will be built on the site of HD Hyundai Heavy Industries' Ulsan Shipyard, with the goal of commencing operations in 2029. SMRs are regarded as one of the next-generation nuclear power technologies. Compared with conventional nuclear power units, SMRs have lower output power, and their major equipment can be configured in a modular manner, combining features such as stable power supply and reduced carbon emissions. As AI data centers requiring round-the-clock, large-scale power supply increase rapidly, SMRs are attracting more attention. According to projections by the Organisation for Economic Co-operation and Development (OECD), by 2050, the global SMR market is expected to grow to 150G...

2026-09-10

US Study Says Third Course of Radiation Therapy May Improve Survival and Symptoms in Children with Recurrent DIPG

According to news from the Icahn School of Medicine at Mount Sinai in the United States on September 2, researchers at the institution released a new study on re-irradiation for recurrent diffuse intrinsic pontine glioma (DIPG). The study shows that carefully selected pediatric patients who receive a third course of radiation therapy after disease recurrence may achieve symptom relief, improved quality of life, and potentially prolonged survival. The related study has been published in Practical Radiation Oncology. DIPG is a highly aggressive pediatric brain tumor that occurs in the brainstem region. The brainstem controls critical life functions such as breathing and movement, so the tumor usually cannot be removed surgically. Data show that DIPG mainly affects children aged 5 to 10, and even...

2026-09-10

First concrete poured for turbine building foundation of Unit 3 VVER-1200 at Leningrad NPP Phase II

On September 9, 2026, concrete pouring began for the foundation of the turbine building of Unit 3 VVER-1200 at Leningrad NPP Phase II in Russia. Construction workers have completed the pouring of the central section of the future foundation, with concrete consumption approaching 5,000 cubic meters. This pour is the first stage of construction of the foundation structure for this building. According to the plan, the contractor will use nearly 5,000 tonnes of rebar and more than 20,000 cubic meters of high-strength concrete to build a monolithic foundation slab 2.5 meters high and more than 8,000 square meters in area. The related operations are currently being carried out simultaneously in 7 construction zones. Konstantin Khudyakov, head of the Leningrad NPP project at TITAN-2 Holding (TITAN-2), said that the foundation construction of the turbine building places high demands on concrete quality, pouring technology and curing conditions, especially in the first few days after pouring, when it is necessary to focus on controlling on-site temperature and humidity and preventing mechanical damage. After the concrete reaches design strength, the contractor will, together with the owner, use non-destructive testing methods to inspect the structure, including ultrasonic testing; at the same time, specimens made from the same batch of concrete will also be subjected to compressive tests on a hydraulic press to confirm that the foundation is capable of bearing the loads of walls, floors, piping and large operating equipment.

2026-09-10

American Society of Nuclear Cardiology Releases New 2026 Guidelines for Stress Testing in SPECT and PET Myocardial Perfusion Imaging

The American Society of Nuclear Cardiology (ASNC) has recently developed and released the "2026 ASNC Guidelines for Stress Testing in SPECT and PET Myocardial Perfusion Imaging." The guidelines have been published online in the Journal of Nuclear Cardiology and will replace the 2016 version to reflect changes in the field of nuclear cardiology over the past decade in terms of technology application, examination workflows, and clinical assessment. The new guidelines focus on stress testing in single-photon emission computed tomography (SPECT) and positron emission tomography (PET) myocardial perfusion imaging, updating recommendations on patient preparation, selection of stress testing modalities, safety management, protocols for different imaging modalities, image interpretation, and report writing. The guideline chair and lead...

2026-09-10

US Oak Ridge National Laboratory Advances 3D-Printed Nuclear Components Manufacturing and Certification

The US Oak Ridge National Laboratory (ORNL) is working with industry partners to advance the application of advanced manufacturing technologies, with a focus on heavy-duty 3D printing, AI-driven automated manufacturing, and digital qualification methods, to address issues such as unstable US industrial supply chains, shortages of skilled workers, and long lead times for large custom components. At an advanced manufacturing facility in Tennessee, ORNL demonstrated two large-scale 3D printing manufacturing cases for the nuclear energy sector. Among them, a three-arm robotic system called MedUSA printed a steel nuclear pressure vessel approximately 3 feet by 5 feet with complex dome geometry by guiding molten steel. Researchers said...

2026-09-10

Construction Site Leveling and Excavation Kicks Off for Hualong One Version 2.0 Demonstration Project of Zhejiang Jinqimen Nuclear Power Phase II

On the morning of September 9, Zhejiang Jinqimen Nuclear Power held a mobilization meeting for high-quality construction of the Hualong One Version 2.0 demonstration project of Phase II, marking the full launch of site leveling and excavation work for Phase II. At the event, Yao Zhaohong, General Manager of Jinqimen Nuclear Power, presented the flag to the Party Member Commando Team for High-Quality Commencement of the Demonstration Project. Zhong Hua, Party Secretary and Chairman of Jinqimen Nuclear Power, delivered a mobilization speech and announced the start of site leveling and excavation work. At 11:11, the first blast for the main excavation of Phase II was successfully detonated, marking that the project construction has entered a stage of accelerated advancement. The mobilization meeting stated that Jinqimen Nuclear Power undertakes the task of constructing the Hualong One Version 2.0 demonstration project, and all participating units and builders must fulfill safety and quality responsibilities, adhere to safety first and quality first, steadily advance project construction, and build a high-standard "New Quality Hualong Demonstration Project."

2026-09-10

Kansai Electric Revises Site Survey Plan for Additional Units at Mihama Nuclear Power Station

On September 9, 2026, Kansai Electric Power Company (KEPCO) announced a revision to its voluntary site survey plan for additional units at the Mihama Nuclear Power Station, extending the completion of the preliminary survey from March 2027 to March 2028, while the detailed survey remains scheduled for completion in 2030. Kansai Electric stated that it resumed the voluntary site survey, which had been suspended since March 12, 2011, on November 5, 2025, for the potential additional units at the Mihama site. Under the original plan announced on September 17, 2025, Kansai Electric first conducted a broad preliminary survey both inside and outside the plant site, then selected a more advantageous area based on geological conditions, and carried out a detailed survey in that area...

2026-09-09

United States and Colombia Sign Strategic Civil Nuclear Cooperation Memorandum of Understanding

On September 8, 2026, U.S. Secretary of State Marco Rubio, Colombian President Abelardo de la Espriella, and Colombian Foreign Minister Omar Blas Escobar attended the signing ceremony of two memoranda of understanding in Barranquilla, Colombia. The related report was published and updated on September 9, 2026. Under the signing arrangement, the first document is a framework memorandum of understanding between the U.S. government and the Colombian government on securing the mining and processing supply of critical minerals and rare earth elements; the second document is a memorandum of understanding between the U.S. government and the Government of the Republic of Colombia on strategic civil nuclear cooperation. Following the signing ceremony, Rubio stated that the United States and Colombia...

2026-09-09

Planned outage at Sweden's Ringhals Unit 4 extended to November 30

The planned maintenance outage at Unit 4 of Sweden's Ringhals nuclear power plant will be extended to November 30 due to the need for additional cleaning work on site. During the planned maintenance outage at Ringhals Unit 3, inspectors discovered rubber residue in parts of the component cooling system. The rubber residue originated from leaking valves within the system. The cleaning work is a preventive measure aimed at avoiding reduced cooling performance or component damage. Sven-Anders Andersson stated that the valve replacement work had originally been scheduled for the coming years, but the rubber degradation exceeded expectations. He said: "We deeply regret the extended outage, but safety and equipment condition remain our top priorities."

2026-09-09