Chubu Electric Power Company withdraws regulatory review application for Hamaoka Nuclear Power Plant reactors

Chubu Electric Power Company said on Monday that it will withdraw its regulatory review application to restart reactors at the Hamaoka Nuclear Power Plant in Shizuoka Prefecture in central Japan. The company also announced the resignation of President Kingo Hayashi and Chairman Satoru Katsuno, who will take responsibility for the company's tampering with seismic data during the restart screening of the plant's Units 3 and 4 reactors.

2026-09-14

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

Japan's GX investment expands nuclear power supply chain demand, 17 Korean nuclear power-related material and equipment suppliers visit Tokyo for business talks

On September 10, 2026, the Korea Trade-Investment Promotion Agency (KOTRA) announced that, together with Korea Hydro & Nuclear Power and the Korea Nuclear Industry Association, it had dispatched the 2026 Smart Energy Week Climate Technology Market Exploration Delegation to Tokyo, Japan. The delegation consisted of 17 Korean suppliers of materials, parts, and equipment in the new energy and nuclear power sectors. KOTRA stated that the move aims to align with Japan's energy transition and growing electricity demand, and to support Korean suppliers in entering the local Japanese supply chain. The Korean delegation, together with the Japan Electrical Manufacturers' Association (JEMA) and RX Japan, jointly held a Japanese power equipment industry...

2026-09-10

Hitachiota City, Ibaraki Prefecture, Japan to Reconsider Literature Survey for Final Disposal Site of High-Level Radioactive Waste

The Hitachiota City Council in Ibaraki Prefecture, Japan, held a closed-door meeting on September 9 to hear council members' opinions on the Ministry of Economy, Trade and Industry's request for the city to conduct a literature survey for selecting a final disposal site for high-level radioactive waste. After the meeting, sources said that two council members expressed support and two expressed opposition, and the city council failed to reach a consensus, deciding to hold another meeting on September 16 for discussion. The closed-door meeting was initiated by Hitachiota Mayor Sadayuki Suzuki, with the aim of providing reference for the city government to judge whether to accept the literature survey. The Ministry of Economy, Trade and Industry made the request to the city on August 31. Suzuki previously said he would "actively consider" conducting the literature survey and hoped...

2026-09-10

NRA Commissioner Inspects Radiation Management at Shimane Nuclear Power Station

Reiko Kanda, a Commissioner of the Nuclear Regulation Authority (NRA) of Japan, visited Matsue City, Shimane Prefecture, from September 7 to 8 to inspect radiation level management and on-site inspection work at the Shimane Nuclear Power Station. The NRA has a dedicated inspection team stationed at the Shimane Nuclear Power Station and conducts a related inspection once a year to confirm that resident inspectors can properly manage and monitor radiation levels. On September 8, the NRA inspected the emergency response center used by the nuclear power station in the event of a severe accident, focusing on confirming the inspectors' emergency response procedures. Reiko Kanda observed the inspection process on site. Reiko Kanda stated that the inspection work was carried out properly and that this inspection will serve as a reference for the NRA's future work.

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

Toshiba Energy Systems Selected for Next-Generation Innovative Reactor Core Structure R&D and Demonstration Project

On September 9, 2026, Toshiba Energy Systems & Solutions Corporation (Toshiba ESS) announced that it has been selected for the second round of public solicitation under the Japanese Ministry of Economy, Trade and Industry's FY2025 supplementary budget project "Support Program for Technology Development and Supply Chain Construction for Next-Generation Innovative Reactor Development and Construction," undertaking the "Next-Generation Innovative Reactor Core Structure R&D and Manufacturing Demonstration Project (Phase 2)." Figure: Image of iBR internal structure Following this selection, Toshiba Energy Systems will further expand its R&D efforts in reactor internal structures, building on the six projects previously selected in the first round. The company plans to collaborate with suppliers to...

2026-09-09

Hitachioomiya City Assembly in Ibaraki Prefecture, Japan, discusses literature survey request for nuclear waste disposal site

Hitachioomiya City in Ibaraki Prefecture, Japan, received a request from Japan's Ministry of Economy, Trade and Industry (METI) asking the city to accept a literature survey for the siting of a final disposal facility for high-level radioactive waste. On September 8, the Hitachioomiya City Assembly held a general question-and-answer session, during which multiple city assembly members expressed their views on whether to accept the survey. Of the five assembly members who filed questions that day, two expressed opposition to accepting the request and one expressed support. The assembly plans to hold a closed-door meeting on September 9, at which each assembly member will state their position, and the relevant content will subsequently be conveyed to Mayor Sadayuki Suzuki for his consideration in formulating the city government's response. Assembly member Toshiyuki Kurata stated that if the literature survey proceeds, it would impact the policies and projects currently being implemented by the city...

2026-09-09

Restart of Unit 3 at Japan's Tomari Nuclear Power Plant May Be Delayed to After End of 2027

The restart of Unit 3 at the Tomari Nuclear Power Plant, operated by Hokkaido Electric Power in Tomari Village, Hokkaido, Japan, may be delayed to after the end of 2027. The company currently maintains its stated target of a restart in early 2027, but has not yet provided a specific date. Key factors affecting the restart schedule include delays in the construction of the tsunami protection embankment, a fatal accident during construction that occurred during the review process by the Nuclear Regulation Authority (NRA) of Japan, and certain technical matters that remain under confirmation and consultation. Hokkaido Electric Power has stated that the embankment is expected to be completed by mid-August 2027. The project was originally scheduled for completion around March 2027, but has been extended due to blizzard conditions and additional...

2026-09-08

Japan Selects Four Companies for Fusion Power Program

Japan's Ministry of Economy, Trade and Industry (METI) has conditionally selected EX-Fusion, Helical Fusion, Linea Innovation, and Starlight Engine to participate in a fusion program targeting reactor operation in the 2030s. The program will provide approximately $370 million, equivalent to around €318 million, in subsidies to selected projects by the end of February 2029. Specific funding allocations are still subject to formal grant decisions. The support corresponds to commitments in Japan's 2023 fusion strategy, which sets out the goal of achieving fusion power in the 2030s...

2026-09-07

Tottori Prefecture nuclear safety advisory council approves safety of MOX fuel plan for Shimane Unit 2

The Tottori Prefecture Nuclear Safety Advisory Council held a meeting in Yonago City on September 6 and submitted an opinion on the MOX fuel power generation project planned by Chugoku Electric Power Co. for Unit 2 of the Shimane Nuclear Power Station. The opinion stated that, based on explanations provided by Chugoku Electric Power Co. and the Japanese government, the safety of the project can be ensured. The Shimane Nuclear Power Station is located in Matsue City, Shimane Prefecture. Chugoku Electric Power Co. plans to use mixed oxide fuel, or MOX fuel, consisting of uranium and plutonium, in Unit 2. This type of power generation is also referred to as plutonium thermal power generation in Japan. The opinion also...

2026-09-07

Hitachiomiya City Assembly in Japan Hears Briefing on Literature Survey for High-Level Radioactive Waste Disposal Site

On September 4, the Hitachiomiya City Assembly in Ibaraki Prefecture, Japan, held a closed-door briefing session regarding the central government's request for the city to initiate a literature survey for the final disposal site selection of high-level radioactive waste. Representatives from the Ministry of Economy, Trade and Industry (METI) and the Nuclear Waste Management Organization of Japan (NUMO) attended the meeting to explain the national energy policy, an overview of the geological disposal project, and the background behind the survey request. All 16 members of the Hitachiomiya City Assembly participated in the briefing, with Mayor Suzuki Sadayuki attending as an observer. The meeting was originally scheduled for approximately two hours but actually lasted about three and a half hours due to the large number of questions from assembly members. After the meeting, Yokote Hiroki, Director of the Radioactive Waste Policy Division at METI's Agency for Natural Resources and Energy, stated that assembly members raised questions covering multiple aspects, including technical details of geological disposal and the site selection procedure for disposal facilities, and that the government side would continue its outreach efforts. Should the City Assembly make a request, METI would provide further explanations.

2026-09-06

Takahama Nuclear Power Plant in Japan to Transport 1,600 Drums of Low-Level Radioactive Waste

Kansai Electric Power announced on September 4 that it will transport low-level radioactive waste generated at the Takahama Nuclear Power Plant to the Low-Level Radioactive Waste Disposal Center of Japan Nuclear Fuel Limited (JNFL) in Rokkasho Village, Aomori Prefecture. According to the plan, the dedicated low-level radioactive waste transport vessel Seiei Maru will berth at the Takahama Nuclear Power Plant on September 5 and depart on September 12 after loading is completed. If the transport schedule is adjusted due to factors such as weather conditions, Kansai Electric Power will announce the actual situation separately. This shipment consists of 200 dedicated containers holding 1,600 waste drums, all of which are cement-solidified waste, excluding homogeneously solidified waste.

2026-09-04

Japan's Tomari Nuclear Power Plant Unit 3 Restart Review Still Requires Additional Fire Safety Documentation

On September 3, a review meeting was held for the restart plan of Unit 3 at Japan's Tomari Nuclear Power Plant. The Nuclear Regulation Authority (NRA) pointed out that the explanations submitted by Hokkaido Electric Power regarding fire safety measures still contain issues requiring further confirmation, and requested the company to provide more detailed assessment materials. The equipment design and construction plan required for the restart of Tomari Unit 3 has been under review since last year. One of the current review priorities is whether relevant workers have adequate and feasible evacuation measures in the event of a fire on site. At the meeting that day, representatives of Hokkaido Electric Power explained the revised fire safety...

2026-09-04

Fire alarms triggered nine times in four weeks at Japan's Fukushima Daiichi Nuclear Power Station

At 21:44 on September 3, a fire alarm was triggered in the water treatment control room building of Japan's Fukushima Daiichi Nuclear Power Station. Tokyo Electric Power Company (TEPCO) stated that no open flames or smoke were found at the scene. After firefighters arrived and conducted inspections, it was confirmed shortly after 22:30 that evening that this was not a fire. TEPCO said it would subsequently inspect the relevant detectors. Including this incident, the Fukushima Daiichi Nuclear Power Station has triggered a total of nine fire alarms in the past four weeks. Previously, on August 8, a fire alarm was triggered in the maintenance building for Units 5 and 6; on August 12, an alarm sounded in the emergency diesel generator room for the high-pressure core spray system of Unit 6; on August 13, an alarm sounded in the main office building; on August 15, an alarm sounded in the southwest stairwell area of the turbine building for Unit 5...

2026-09-04

New Fuel Delivery Completed at Japan's Sendai Nuclear Power Plant

Kyushu Electric Power Co. announced on September 2 that new fuel required for Units 1 and 2 of Japan's Sendai Nuclear Power Plant has been delivered. The transport operation began on August 30, 2026, and concluded on September 2. According to information released by Kyushu Electric Power, the new fuel delivered this time was manufactured by Nuclear Fuel Industries, Ltd. Specifically, Unit 1 of the Sendai Nuclear Power Plant received 24 new fuel assemblies transported in 12 shipping containers, while Unit 2 received 28 new fuel assemblies transported in 14 shipping containers. The new fuel transport was carried out using a combination of land and sea routes. Kyushu Electric Power stated...

2026-09-03

Second Phase of Decommissioning for Unit 1 of Japan's Ikata Nuclear Power Plant Approved by Prefectural Committee

The Environmental Safety Management Committee for the Ikata Nuclear Power Plant in Ehime Prefecture, Japan, held a meeting in Matsuyama City on September 2 to discuss plans by Shikoku Electric Power to proceed with the second phase of decommissioning for Unit 1 of the Ikata Nuclear Power Plant. The unit, located in Ikata-cho, Ehime Prefecture, is currently in the process of being decommissioned. The decommissioning of Unit 1 at the Ikata Nuclear Power Plant has been divided into four main phases. Shikoku Electric Power had previously conducted prior consultations with Ehime Prefecture and Ikata-cho regarding the transition to the next phase, obtained local consent, and submitted relevant applications to Japan's Nuclear Regulation Authority (NRA). In July of this year, the NRA approved the application...

2026-09-03

Japanese regulator plans budget for research on next-generation reactor reviews

The Nuclear Regulation Authority (NRA) of Japan has included research costs required for reviewing next-generation nuclear reactors in its budget request for the next fiscal year. The funds will be used to evaluate the effectiveness of new safety measures, providing a review basis for potential future construction or replacement applications. The Japanese government is promoting the development of next-generation nuclear reactors, including innovative light-water reactors that further enhance safety performance based on existing light-water reactor technology. Since November 2025, Kansai Electric Power Company (KEPCO) has been conducting geological surveys at the Mihama Nuclear Power Plant in Fukui Prefecture, in preparation for possible future plans to replace existing units with next-generation reactors. At a meeting held on September 2...

2026-09-03