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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

"Power-Hungry Beast" Reshapes the Logic of Power Asset Revaluation: Can Tech Giants' 20-Year Long-Term Agreements Fundamentally Resolve the Nuclear Power Economics Dilemma?

On October 6, 2026, Constellation Energy (Nasdaq ticker CEG, the largest commercial nuclear reactor operator in the United States) and Google announced the signing of a 20-year strategic clean energy cooperation agreement. Following the announcement, Constellation Energy's stock price rose approximately 12% that day. The capital market's excitement is understandable. But an easily overlooked detail is that the true structure of this deal differs considerably from the "1 billion dollars" in media headlines. Bloomberg's initial report of "at least 1 billion dollars" was the figure at the time the deal first came to light, while the officially announced agreement amount is 4.3 billion dollars. The essence of the 4.3 billion dollars is Constellation Energy's capital investment to upgrade its 11 nuclear power units, with Google providing revenue certainty for this investment through a 20-year power purchase agreement.

2026-10-09

Korea Atomic Energy Environment Corporation Earns Top Grade A in All Categories of Radioactivity Analysis Capability Evaluation for Nine Consecutive Years

The Korea Atomic Energy Environment Corporation announced on August 21 that it received an A-grade rating in all evaluation categories for the ninth consecutive year in the 2026 Radioactivity Analysis Capability Evaluation conducted by the Korea Institute of Nuclear Safety. In this evaluation, the corporation achieved A-grade results across all analysis items covering 7 samples and 12 radionuclides, demonstrating high detection precision and quality control capabilities. The Radioactivity Analysis Capability Evaluation has been conducted annually since 1997, primarily to verify the testing capabilities of domestic radioactivity analysis institutions in Korea, as well as the reliability and quality management level of related analytical data. This year, a total of 58 institutions participated in the evaluation, including regional radiation monitoring...

2026-08-21

China's First Qualification for Radiation Health Testing and Evaluation of BNCT Equipment Approved

Recently, the Beijing Municipal Health Commission, in accordance with the "Administrative Measures for Radiation Health Technical Service Institutions" (Guoweiban ZhiJian Fa [2026] No. 1), organized experts to conduct on-site reviews of two qualification expansion applications submitted by the National Center for Occupational Safety and Health under the National Health Commission. The projects include performance testing and evaluation of Boron Neutron Capture Therapy (BNCT) equipment and thyroid iodine-131 testing. During the review process, the expert panel conducted a comprehensive examination of the center's management system, personnel allocation, instruments and equipment, and technical capabilities related to radiation health testing and evaluation through document review, technical inquiries, on-site practical operations, and simulated demonstrations...

2026-08-12

Fujita Health University in Japan Advances Research on Expanding BNCT Indications for Deep-Seated Cancers, to Conduct 18F-FBPA PET Exploratory Evaluation

On August 10, Stella Pharma Corporation of Japan announced that it is collaborating with Fujita Health University and other institutions to advance research and development aimed at expanding Boron Neutron Capture Therapy (BNCT) to deep-seated cancers. As part of this project, Stella Pharma will participate in an exploratory study on 18F-FBPA uptake capacity in deep-seated cancers conducted by Fujita Health University. The study will use 18F-FBPA PET to evaluate the tumor accumulation of boron drugs used in BNCT in deep-seated cancers, and based on the findings, explore the possibility of expanding BNCT indications in the future. The study plans to collect data from 50 cases, including pancreatic cancer, hepatocellular carcinoma, and biliary tract cancer, to accumulate foundational evidence needed for the development of BNCT for deep-seated cancers. BNC...

2026-08-11

TAF-ID database 22nd edition released, expanding advanced nuclear fuel thermodynamic evaluation data

The International Thermodynamic Database for Advanced Fuels (TAF-ID) project has been running for over a decade. The project employs the CALPHAD (Calculation of Phase Diagrams) method to develop a thermodynamic database that supports computational analysis of advanced nuclear fuel materials, enabling prediction of phase diagrams and thermodynamic properties of relevant systems. According to project documentation, Version 22 of the TAF-ID database has been released. This update adds and revises assessment data for material systems including Na-U, Na-O, Na-UO₂, U-Ru, U-Si, Al-Si-U, Fe-Pu-U, and O-N-U, and updates gas-phase data based on the latest publicly available information. The database assessment scope has been expanded to 44 elements, 272 binary systems, 151 ternary systems, and 3...

2026-08-11

Japan's Nuclear Regulation Authority Begins Revising Seismic Motion Evaluation Guidelines

In response to the data falsification issue at Chubu Electric Power's Hamaoka Nuclear Power Plant, Japan's Nuclear Regulation Authority (NRA) has initiated the revision of seismic motion evaluation guidelines. The falsification involves seismic motion evaluation data that underpins the safety of nuclear power plants, carrying significant implications. The NRA has stated it will treat this matter with utmost seriousness, aiming to establish stricter standards and monitoring systems through the guideline revision. Chubu Electric Power's data tampering is a grave issue that undermines public trust in nuclear power plant safety. Seismic motion evaluation is an extremely critical element in assessing the seismic resistance of nuclear power plants, and data accuracy is fundamental to safety. This incident has called into question the safety of the Hamaoka Nuclear Power Plant, necessitating a thorough investigation and re-evaluation by regulatory authorities. In the revision work...

2026-08-01

Hefei establishes a new joint laboratory for fusion reactor material irradiation and evaluation, driving the coordinated development of the nuclear fusion industry.

Recently, the Joint Laboratory for Fusion Reactor Material Irradiation and Evaluation—co-established by the Institute of Plasma Physics (Hefei Institutes of Physical Science, Chinese Academy of Sciences) and the Institute of High Energy Physics (Chinese A

2026-07-27