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South Korean research team reveals that water storage capacity of cold subducting slabs has been underestimated using synchrotron radiation sources

A research team led by Professor Yongjae Lee of the Department of Earth System Sciences at Yonsei University in South Korea has recently found that in cold, rapidly descending tectonic subduction zones, crustal rocks may transport up to 1 trillion kilograms of water to the mantle each year—approximately twice the previous estimate. The findings have been published in Nature Communications. Subduction zones are regions where Earth's tectonic plates converge and one plate descends beneath another, often accompanied by volcanic and seismic activity. For a long time, the academic community has generally believed that serpentinite, a water-bearing rock, gradually dehydrates as it descends with the plate due to increasing pressure and temperature, and the released water further promotes melting of the overlying plate and is associated with the formation of volcanic arc chains.

2026-09-07

South Korea Develops 3D Non-Contact Inspection System for High-Temperature Superconducting Wire

The Korea Electrotechnology Research Institute (KERI) recently announced that a research team led by Ha Hong-su and Park In-sung at its Low-Temperature Device Research Center has developed a three-dimensional non-contact ultra-precision inspection system capable of continuously measuring the thickness and width of high-temperature superconducting (HTS) wire. The institute stated that this is the world's first such inspection system for HTS wire. KERI researchers Ha Hong-su and Park In-sung pose with a high-temperature superconducting wire beside the 3D non-contact ultra-precision inspection system. [Korea Electrotechnology Research Institute] HTS wire exhibits near-zero electrical resistance below a specific temperature, enabling high-current, low-loss transmission,...

2026-09-07

South Korea's KNR System Develops Heavy-Duty Bipedal Robot for Nuclear Facility Decommissioning Applications

South Korean robotics company KNR System recently announced the completion of the lower-body development and basic locomotion verification for its large-scale industrial "super-humanoid" robot. The robot's leg structure can support loads of up to 3 tons and move at a speed of 3 to 4 kilometers per hour. The company plans to release the full model by the end of 2026 and has already initiated whole-body system integration work. KNR System is developing a super-humanoid robot design. Image source: KNR System According to reports, the newly developed robot legs stand approximately 2.9 meters tall, with a maximum load capacity of 3 tons and a dual-arm payload of 600 kilograms. Each side is equipped with 12 joints, utilizing 10,000 Nm-class high-output hydraulic rotary actuators...

2026-09-07

South Korean President's Visit to France to Discuss Korea-France Nuclear Energy Cooperation and Joint Nuclear Power Plant Exports

South Korean President Lee Jae-myung arrived in Nice, France, on September 6 local time, beginning a five-day, four-night state visit to France. The visit was arranged at the invitation of French President Emmanuel Macron and coincides with the 140th anniversary of the establishment of diplomatic relations between South Korea and France. According to the visit schedule, Lee Jae-myung will travel to Paris on the 8th for talks with Macron at the Élysée Palace. The two sides are expected to discuss cooperation in areas such as artificial intelligence, aerospace, nuclear energy, and biotechnology, with nuclear energy cooperation listed as one of the key agenda items. In the nuclear energy sector, the two sides are expected to explore cooperation plans, including combining France's capabilities in nuclear design and reprocessing technology with South Korea's experience in nuclear power plant construction and equipment manufacturing, to study the feasibility of joint exports of nuclear power plants to third-country markets.

2026-09-07

Unit 3 at Saeul Nuclear Power Plant in South Korea Shut Down Again During Trial Operation

Unit 3 at the Saeul Nuclear Power Plant, operated by Korea Hydro & Nuclear Power (KHNP), was shut down again during trial operation. The unit, located in Ulju County, Ulsan, South Korea, has a generating capacity of 1,400 MW. According to the plant operator, operators manually shut down the reactor at approximately 3:01 p.m. on the 6th. The shutdown was initiated after a leak was confirmed in a pipe related to turbine steam condensate. The plant stated that the manual shutdown was carried out to ensure facility stability and facilitate maintenance. The plant also stated that the shutdown caused no radiological impact and that the unit is currently in a stable condition. Personnel are analyzing the cause of the pipe leak. This...

2026-09-07

Changwon National University and Wrocław University of Science and Technology Partner to Cultivate Nuclear Power Manufacturing Talent

The Artificial Intelligence Innovation Research Center for Next-Generation Nuclear Energy Equipment and Component Manufacturing (AI-NMIC) at Changwon National University recently signed a cooperation agreement with Wrocław University of Science and Technology (WUST) in Poland, under which the two institutions will collaborate on talent development in the fields of next-generation nuclear power and nuclear energy equipment manufacturing. This marks AI-NMIC's first formal partnership with an overseas university. Wrocław University of Science and Technology is one of Poland's key technical universities, with strong foundations in engineering fields such as mechanical, electrical, and materials science. As Poland advances...

2026-09-06

South Korean President to Visit France for Nuclear Energy Cooperation Talks

At the invitation of French President Emmanuel Macron, South Korean President Lee Jae-myung will pay a state visit to France from September 6 to 9. The South Korean side stated that during the visit, the two sides will hold discussions on cooperation in high-tech fields such as artificial intelligence, aerospace, nuclear energy, and biotechnology, with nuclear energy cooperation listed as one of the key agenda items. South Korean National Security Advisor Wi Sung-lac said at a press conference on the 4th that this visit will serve as an opportunity to consolidate the Korea-France global strategic partnership. The South Korean side hopes to expand bilateral cooperation in areas such as nuclear energy through joint research and development, corporate collaboration, and market access...

2026-09-05

South Korean civic groups oppose construction of spent fuel storage facility at Hanbit Nuclear Power Plant site

On September 4, the Joint Action Organization Against Hanbit Nuclear Power Plant in the Honam region of South Korea held a press conference in front of the high-level radioactive waste forum venue in Gochang County, North Jeolla Province, demanding the cancellation of plans to build a storage facility at the Hanbit Nuclear Power Plant site and proposing fundamental measures to address nuclear waste issues. The organization stated that Korea Hydro & Nuclear Power (KHNP) is pushing forward with the construction of temporary storage facilities at the plant site on the grounds that the spent fuel pools at Hanbit Nuclear Power Plant may reach saturation by 2030. The organization argued that this move fails to adequately respond to the opinions of residents near the plant and amounts to unilaterally shifting the burden of nuclear waste onto the local community. The organization stated that the current plan involves building storage facilities at the existing nuclear power plant site...

2026-09-06

Seoul National University of Science and Technology and Doosan Enerbility Deepen Nuclear Design Cooperation

Seoul National University of Science and Technology (SeoulTech) and Doosan Enerbility recently signed a memorandum of understanding (MOU) to conduct industry-academia cooperation in next-generation nuclear power plants, small modular reactors (SMRs), and core nuclear equipment technologies, aiming to enhance competitiveness in nuclear design technology and jointly cultivate specialized research talent. The signing ceremony was held on September 2 at SeoulTech. Attendees included Seo Young-bin, Senior Vice President of Nuclear Design at Doosan Enerbility, Kim Jong-in, Department Head, along with relevant university officials. Under the MOU, the two parties will integrate the university's research capabilities with the company's expertise in nuclear power...

2026-09-04

South Korea Exports Molten Salt Reactor R&D Technology to Denmark

The Korea Atomic Energy Research Institute (KAERI) announced on September 4 that it has signed a two-year contract worth USD 2.26 million (approximately KRW 3 billion) with Danish nuclear energy company Saltforce to provide molten salt reactor-related R&D services, covering areas such as nuclear fuel manufacturing, molten salt testing, and material corrosion assessment. Molten salt reactors are a class of next-generation reactors that typically use high-temperature molten salt as a fuel carrier or coolant medium. Based on the molten salt chemical system, this type of technology is mainly divided into fluoride-based and chloride-based systems. Under the contract arrangement, KAERI will provide support for the fluoride-based...

2026-09-04

Non-compliant Welding Procedures at Two Units of South Korea's Hanbit Nuclear Power Plant

The Hanbit Nuclear Power Plant headquarters of Korea Hydro & Nuclear Power Co., Ltd. (KHNP) recently confirmed that Units 1 and 2 of the plant had used welding procedure specifications (WPS) that had not undergone impact testing during maintenance of the component cooling water heat exchangers. A retrospective inspection found that among 14 repair activities conducted since the relevant heat exchangers were replaced in 2007, 6 cases involved similar non-compliance. The issue was identified during the 28th planned preventive maintenance outage of Hanbit Unit 1. Inspections revealed that some welding procedure specifications used for repairs to the water chambers of the component cooling water heat exchangers did not meet requirements, involving repair work on worn areas inside the heat exchanger water chambers in the cooling systems of Units 1 and 2. Hanbit Nuclear...

2026-09-04

Gyeongsangbuk-do lawmakers demand stronger nuclear power plant accident notification and oversight

On September 3, Gyeongsangbuk-do lawmaker Kim Jae-jun spoke at the 365th provisional session of the Gyeongsangbuk-do Council, criticizing the delayed notification and inadequate response to the recent boric acid solution leak at Unit 6 of the Hanul Nuclear Power Plant, and calling for stronger resident safety protection mechanisms in areas with concentrated nuclear power plants. Kim stated that on August 3, a boric acid solution containing radioactive materials leaked from Unit 6 of the Hanul Nuclear Power Plant during spent fuel transfer, but local residents were not informed of the incident until approximately three weeks after it occurred. He argued that Korea Hydro & Nuclear Power (KHNP) failed to disclose information about the incident promptly and transparently, undermining residents' trust in nuclear safety management...

2026-09-04

Radiation Emergency Drill Conducted at Unit 6 of South Korea's Hanul Nuclear Power Plant

Korea Hydro & Nuclear Power (KHNP) recently conducted a comprehensive radiation disaster prevention drill at Unit 6 of its Hanul Nuclear Power Plant to test the emergency response system and on-site handling capabilities under radiation emergency conditions. According to the Hanul Nuclear Power Plant, the drill was held on September 3, organized in accordance with the evaluation guidelines established by the Korea Institute of Nuclear Safety (KINS) and based on the National Radiation Emergency Plan. The drill scenario was not disclosed in advance, and the evaluation methods were also adjusted, with a focus on verifying the unit's response capabilities under actual emergency scenarios. During the drill, all emergency personnel of Unit 6 at Hanul Nuclear Power Plant participated in the response. The scenario simulated a casualty incident occurring within the controlled area, with medical rescue operations organized, and a 3.2 MW mobile generator was used to inspect the operational capability of emergency facilities.

2026-09-04

Cause Identified for Automatic Shutdown of Unit 3 at Shin-Kori Nuclear Power Plant in South Korea

The Nuclear Safety and Security Commission (NSSC) of South Korea reported on the 4th that it has completed its investigation into the automatic shutdown of Unit 3 at the Shin-Kori nuclear power plant during commissioning tests on the 11th of last month, and has approved the resumption of commissioning tests for the unit. The investigation confirmed that the direct cause of the incident was an operator error in inputting parameters during the process of restoring reactor power after the tests. According to the investigation findings, at the time of the incident, while setting the parameters for the turbine control valve position limiter, the operator mistakenly entered a value intended to limit the upper opening limit of the valve as a value in the valve closing direction. This limiter is used to prevent a rapid increase in the amount of steam entering the turbine for power generation within a short period. After the parameter error, the unit experienced an interruption in power output at approximately 80% power level, followed by an automatic shutdown.

2026-09-04

Sejong City Requests National Support for Proton Cancer Therapy Center Budget

On September 2, 2026, the Democratic Party of Korea and Sejong City held their first budget policy consultation meeting at the Sejong City Government to discuss key agenda items and budget support for the city. At the meeting, Sejong City Mayor Cho Sang-ho requested the Democratic Party's attention to several issues, including securing national funding for the construction of a cancer proton therapy center, improving the general grant system for Sejong City, and promoting the passage of the Special Act on the Administrative Capital within the year. After the closed-door consultation, a relevant spokesperson stated in a briefing that the meeting proposed allocating 300 million KRW each in the next year's national budget for a feasibility study on the construction of the cancer proton therapy center and for the formulation of the basic plan for the National Central Bioresource Center.

2026-09-02