Japan to Use Fukushima Decontaminated Soil at Government Office Buildings in Sendai and Saitama

At a Cabinet meeting held at the Prime Minister's Office on August 25, the Japanese government decided to use decontaminated soil generated from the Tokyo Electric Power Company (TEPCO) Fukushima Daiichi Nuclear Power Station accident for flower beds and other areas at joint government office buildings in Sendai City and Saitama City. This will mark the first use of such recycled soil outside Tokyo. According to the plan, the relevant office buildings will use a total of approximately 2 cubic meters of low-radioactivity "reconstruction recycled soil," with the specific construction schedule still being coordinated. The usage site in Saitama City is located at the government joint office building in the Saitama New Urban Center area, and Sendai City will also implement similar arrangements at its joint government office building. Under Japanese law, soil decontaminated after the Fukushima Daiichi Nuclear Power Station accident must be transported outside Fukushima Prefecture for final disposal by March 2045. The Japanese government hopes that by first using such soil in public facilities, it can promote the final disposal work outside Fukushima Prefecture and enhance public understanding of the safety and necessity of such soil.

2026-08-25

Fukui Prefecture in Japan Likely to Approve KEPCO's Dry Storage Facility for Spent Nuclear Fuel

According to multiple officials of Fukui Prefecture, Japan, Governor Takato Ishida of Fukui Prefecture is expected to approve Kansai Electric Power Company's (KEPCO) construction of a dry storage facility for spent nuclear fuel at its nuclear power plants within the prefecture. If completed, this would mark the first adoption of such an on-site interim storage facility at KEPCO's nuclear power plants. A dry storage facility is used to store spent nuclear fuel discharged from reactors. The basic approach involves placing spent fuel into dedicated metal containers and cooling them naturally through air circulation, without relying on electrical systems. Since the containers themselves can be transported by ship or trailer, subsequent off-site transfer is relatively convenient; even in the event of a power outage, the associated accident risk is considered low. Japan Atomic Power Company (JAPC) and Shikoku Electric Power Company operate nuclear power plants that have already adopted this storage method.

2026-08-25

Kansai Electric Power Launches Two Joint Research Projects for Nuclear Power Plant Decommissioning

Kansai Electric Power Co., Inc. announced on August 24 that it has completed the selection of joint research projects related to nuclear power plant decommissioning for fiscal year 2026, choosing two proposals from previously solicited research plans, and signed joint research contracts and commenced research activities on the same day. The projects target research on products and technologies applicable to decommissioning operations at Kansai Electric Power's nuclear power plants. The company solicited research proposals to be implemented from fiscal year 2026 between March 16 and April 30, 2026, with a focus on improving the safety and efficiency of dismantling operations, reducing radioactive waste, and supporting local companies in developing related products and technologies. Selected projects...

2026-08-24

Japan's TEPCO Receives 4.8 Billion Yen in Nuclear Damage Compensation Funds

Tokyo Electric Power Company Holdings (TEPCO Holdings) announced on August 24 that it received a fund disbursement of 4.8 billion yen from the Nuclear Damage Compensation and Decommissioning Facilitation Corporation (NDF) on the same day. The disbursement was made in accordance with the revised Special Business Plan approved on March 31, 2026. TEPCO stated that, to date, it has received 188.9 billion yen in compensation under the Act on Compensation for Nuclear Damage, and a cumulative total of 11.5524 trillion yen in fund disbursements from the NDF. As the total compensation payments expected by the end of September 2026 are projected to exceed the combined amount of the above funds, the company applied for the 172nd fund disbursement. TEPCO said that while receiving institutional financial support, it will continue to advance compensation efforts for nuclear accident victims and meet related compensation demands. Information on claims and payment status, changes in cumulative total payments, and agreement amounts by category is available through the company's public channels.

2026-08-24

Three Years Since Japan Began Discharging Nuclear-Contaminated Water: Over 170,000 Tons Released Across 22 Rounds

Since August 24, 2023, Japan has been discharging nuclear-contaminated water from the Fukushima Daiichi Nuclear Power Station into the Pacific Ocean. As of August 24, 2026, Japan has completed a total of 22 rounds of discharge, with a cumulative volume of approximately 173,000 tons. It is understood that the volume of water stored in on-site tanks has decreased by about 7% compared to before the discharge began. Tokyo Electric Power Company plans to increase the discharge volume of nuclear-contaminated water starting from the current fiscal year and has set a target to complete the decommissioning of the nuclear power plant by 2051. ...

2026-08-24

Japan's GX Promotion Organization Invests in Nuclear Fusion Startups

Japan's Green Transformation Promotion Organization (GX Promotion Organization) has invested in two startups, focusing on nuclear fusion-related technology and plastic recycling businesses respectively. The public funds invested are expected to be approximately 3 billion yen; when private sector funds are included, the total related investment is expected to reach approximately 20 billion yen. The two companies are Kyoto Fusioneering and JEPLAN. Among them, Kyoto Fusioneering is primarily engaged in the development of nuclear fusion engineering technology, while JEPLAN is involved in circular economy businesses such as plastic recycling. Details of the investment are expected to be officially announced by the relevant parties. This investment is seen as part of Japan's push to industrialize its green transformation.

2026-08-24

Collective Radiation Dose of Workers at Japan's Fukushima Daiichi Nuclear Power Station Ranks Highest Nationwide

Japanese nuclear power plant operators are required to submit radiation management reports to the Nuclear Regulation Authority (NRA) annually, detailing the exposure status of plant workers. According to the relevant 2025 reports, the collective radiation dose of workers at Tokyo Electric Power Company (TEPCO)'s Fukushima Daiichi Nuclear Power Station remains significantly higher than at other Japanese nuclear plants, indicating that the radiological impact from post-accident on-site decommissioning and management work is still ongoing. By collective dose per plant, Fukushima Daiichi recorded 20.97 person-sieverts, the highest in Japan. This figure is nine times the 2.22 person-sieverts reported at Kansai Electric Power's Takahama Nuclear Power Station...

2026-08-24

No abnormalities detected at multiple nuclear power plants after earthquake in Ibaraki Prefecture, Japan

At around 2 a.m. on August 23, an earthquake struck the southern part of Ibaraki Prefecture, Japan, with a maximum seismic intensity of 5-lower observed in parts of Ibaraki Prefecture, Tokyo Metropolis, Saitama Prefecture, and Chiba Prefecture. The Japanese government subsequently established a liaison office at the Crisis Management Center of the Prime Minister's Official Residence. Japanese Prime Minister Sanae Takaichi stated that relevant departments have been instructed to verify the damage situation and promptly release accurate information to the public. The earthquake posed no risk of tsunami. Japan Atomic Power Company (JAPC) stated that a seismic intensity of 3 was observed in the area where the Tokai Daini Nuclear Power Plant is located in Tokai Village, Ibaraki Prefecture. The unit is currently shut down, and as of now...

2026-08-24

Restart Plan for Unit 3 of Japan's Tomari Nuclear Power Plant May Face Uncertainty Due to Supplementary Review and Accident

Hokkaido Electric Power Co.'s Unit 3 of the Tomari Nuclear Power Plant was originally scheduled to restart in 2027, but the plan may face uncertainty due to additional review items and a fatal accident at the construction site. The Nuclear Regulation Authority (NRA) announced on August 20 that it will hold a supplementary review meeting on September 3 to deliberate on the approval of construction plans related to the restart of Unit 3 at the Tomari Nuclear Power Plant. This review requires new confirmation of fire safety measures. Hokkaido Electric Power stated that it will explain the construction plans at the September meeting and continue to work toward the 2027 restart target. Additionally, during the seawall construction at the Tomari Nuclear Power Plant, a...

2026-08-23

Japan Explains Plan for Spent Fuel Interim Storage Facility in Kaminoseki Town

Japan's Agency for Natural Resources and Energy recently held an explanatory meeting with the Kaminoseki Town Assembly regarding the Chugoku Electric Power Company's plan to construct a spent fuel interim storage facility in Kaminoseki Town, Yamaguchi Prefecture. The briefing covered the Japanese government's nuclear fuel cycle policy, facility safety, and related subsidy systems. The meeting was held on the 19th at the Kaminoseki Town Assembly. Previously, the Japanese government had decided to revise guidelines related to nuclear energy policy and included the Kaminoseki Town spent fuel interim storage facility plan within them. At the meeting, the Agency for Natural Resources and Energy stated that interim storage facilities are essential to supporting...

2026-08-23

JAEA Plans to Adjust Decommissioning Plan for Monju Fast Breeder Reactor

The Japan Atomic Energy Agency (JAEA) announced on August 21 that it plans to adjust the decommissioning plan for the Monju fast breeder reactor in Tsuruga City, Fukui Prefecture. Under the revised plan, the remaining neutron shielding layers and other components inside the reactor, along with 227 dummy fuel assemblies, will no longer be removed separately in the current phase as originally planned, but will instead be handled together during the subsequent reactor pressure vessel dismantling phase. Monju is currently in the decommissioning process. Previously, JAEA had planned to proceed with the removal of internal reactor components within the current fiscal year, but due to two equipment failures, the related work was temporarily suspended, and the overall schedule is expected to be delayed by approximately one year. As of May 25, 595 shielding layers and related components in the reactor...

2026-08-22

Takahama Town in Fukui Prefecture, Japan, Plans to Give Prior Consent to Kansai Electric Power's Construction of Spent Fuel Dry Storage Facility

On August 19, Hisakatsu Nishijima, mayor of Takahama Town in Fukui Prefecture, Japan, stated that he would give prior consent to Kansai Electric Power Co.'s plan to construct a spent fuel dry storage facility, in accordance with the safety agreement signed with the company. Following Mihama Town, Takahama Town became the second municipality in Fukui Prefecture hosting nuclear power plants to express its intention to give prior consent to the plan. On the same day, Nishijima explained this decision to council members at a meeting of the town assembly held at the town office, noting that he had already obtained the assembly's understanding in advance. He said the town government made its judgment after confirming relevant issues item by item, including the specific arrangements for transporting spent fuel out of the prefecture...

2026-08-21

Kyushu Electric Power explains holding company transition to Kagoshima Prefecture; Sendai Nuclear Power Plant business to continue

On August 20, Kyushu Electric Power President Masaru Nishiyama and two others visited the Kagoshima Prefectural Government to explain to Governor Koichi Shiota the company's plan to transition to a holding company structure in October this year. Under the plan, Kyushu Electric Power will establish a new holding company, Kyuden Holdings, as the group's parent company to improve overall group management efficiency. Following the restructuring, relevant subsidiaries under Kyushu Electric Power will continue to undertake nuclear power operations, including the Sendai Nuclear Power Plant. During the meeting, Governor Shiota specifically highlighted the dry storage facility for spent nuclear fuel that Kyushu Electric Power plans to adopt at the Sendai Nuclear Power Plant...

2026-08-21

Fire alarm triggered for sixth time in August at Japan's Fukushima Daiichi Nuclear Power Station; fire department confirms no fire occurred

At approximately 3:54 a.m. on August 21, a fire alarm was triggered on the first floor of the access control building at the Fukushima Daiichi Nuclear Power Station. Tokyo Electric Power Company (TEPCO) stated that no open flames or smoke were found near the site; shortly after 5:00 a.m., the fire department confirmed that the alarm was not caused by a fire. Readings from radiation monitoring stations around the plant also showed no significant fluctuations. This was the sixth fire alarm at the Fukushima Daiichi Nuclear Power Station since the beginning of August. Previously, the maintenance building for Units 5 and 6 triggered a fire alarm on August 8; the emergency diesel generator room for the high-pressure core spray system of Unit 6 triggered a fire alarm on August 12; the main administration building triggered a fire alarm on August 13...

2026-08-21

Ikata Nuclear Power Station's miscellaneous solid waste incineration facility returns to normal operation

Shikoku Electric Power Co. reported on August 20 that the miscellaneous solid waste incineration facility at Ikata Nuclear Power Station returned to normal operation at 12:15 p.m. that day after inspections and component replacements. Previously, a small amount of ash leakage had occurred beneath the ceramic filter of the facility. According to the report, at approximately 10:25 a.m. on August 13, operating personnel from a partner company discovered ash-like material beneath the ceramic filter of the operating incineration facility in the miscellaneous solid waste incinerator building of Ikata Nuclear Power Station. On-site investigation confirmed that the fallen material was ash, and the leakage had stopped. The leaked ash remained within the building and was fully recovered, amounting to 0.3 grams with a radioactivity of 8...

2026-08-20

Aomori Prefecture in Japan to Apply as Candidate Site for Nuclear Fusion Power Generation Demonstration Facility

On August 19, Soichiro Miyashita, Governor of Aomori Prefecture, stated that the prefecture will apply as a candidate site for a nuclear fusion power generation demonstration facility once relevant preparatory work is completed. Starlight Engine, a Japanese nuclear fusion startup, is currently soliciting candidate sites from prefectures and government-designated cities, with plans to conduct field surveys of promising candidates as early as this autumn. Starlight Engine plans to finalize the construction site by 2028, launch the FAST nuclear fusion power generation demonstration project in 2035, and conduct power generation demonstrations in 2038. The application deadline for site selection is October. Aomori Prefecture stated that it will consult with Rokkasho Village and, after preparing the application documents, formally submit the application.

2026-08-20

Japan's regulator says steam leak at Mihama Nuclear Power Plant Unit 3 was "avoidable"

On August 19, Japan's Nuclear Regulation Authority (NRA) released the results of its nuclear regulatory inspections for the first quarter of the current fiscal year, determining that the steam leak incident at Mihama Nuclear Power Plant Unit 3, operated by Kansai Electric Power Co., in May this year was "foreseeable within a reasonable range" and that the associated losses "could have been avoided." The incident occurred in the high-pressure turbine area of Mihama Unit 3. A small hole approximately 8 centimeters long and 1 centimeter wide appeared in the metal cover atop the high-pressure turbine casing, causing a steam leak that forced a manual reactor shutdown. In its assessment, the NRA concluded that the event was foreseeable and could have been prevented through appropriate management or maintenance measures. However, since no pipe rupture or fire occurred between the onset of the steam leak and the reactor shutdown, the NRA rated the significance and severity of the incident at the lowest of four levels.

2026-08-20

Kansai Electric's Dry Cask Storage Project for Spent Fuel at Three Fukui Nuclear Plants Accelerates

Kansai Electric Power Company (KEPCO) plans to construct dry cask storage facilities for spent fuel at the sites of its three nuclear power plants in Takahama, Oi, and Mihama in Fukui Prefecture, Japan, and the local approval process for the project has recently accelerated. According to local arrangements, in addition to regulatory review, the project requires prior consent from the Fukui Prefectural Government and the towns where the nuclear plants are located. The Nuclear Regulation Authority (NRA) of Japan has completed safety reviews of the dry cask storage facility plans for the Takahama and Mihama nuclear power plants, while the plan for the Oi plant remains under review. Takahama Town Mayor Hisakatsu Nishijima...

2026-08-20

Trial lifting of damaged fuel assembly completed at Unit 2 of Japan's Fukushima Daiichi Nuclear Power Station

Tokyo Electric Power Company (TEPCO) announced on August 18 that a trial lifting of a damaged fuel assembly in the spent fuel pool of Unit 2 at the Fukushima Daiichi Nuclear Power Station has been completed. The assembly was damaged in a fall 45 years ago and was subsequently repaired with wire. This trial lifting was conducted to confirm whether it can be safely handled during the subsequent removal operation. A total of 615 fuel assemblies are stored in the Unit 2 fuel pool, including 587 spent fuel assemblies and 28 unused fuel assemblies. The removal work began on June 2, and the fuel assemblies will be transferred to the shared fuel pool within the plant site. As of August 17, 35 fuel assemblies had been removed. Despite interruptions during the operation, Tokyo Electric Power Company...

2026-08-20

Eight economic organizations in Hokkaido urge early restart of Tomari Nuclear Power Plant Unit 3 and electricity price reduction

On August 19, eight economic organizations in Hokkaido, including the Hokkaido Economic Federation, submitted a request to Hokkaido Electric Power Company (HEPCO), urging the company to promote the early restart of Unit 3 at the Tomari Nuclear Power Plant and to reduce electricity prices as soon as possible after restart, while ensuring that safety measures are given priority. On the same day, Hiroshi Fujii, Chairman of the Hokkaido Economic Federation and Chairman of Hokkaido Electric Power Company, and Mitsuharu Yasuda, Chairman of the Hokkaido Chamber of Commerce and Industry and Chairman of Hokuyo Bank, along with other heads of economic organizations, visited HEPCO's headquarters in Sapporo and presented the request to HEPCO President Susumu Saito. The request states that the Tomari Nuclear Power Plant is of great significance for Hokkaido's economic growth and decarbonization efforts...

2026-08-20

Investigation into Automatic Shutdown of Unit 3 at Japan's Ohi Nuclear Power Plant: Damage Found in Exciter Rotating Rectifier

Kansai Electric Power reported on August 19 that Unit 3 of the Ohi Nuclear Power Plant experienced an automatic generator trip triggered by a generator loss-of-field alarm at 23:56 on August 8, followed by an automatic reactor shutdown. At the time of the event, the unit was operating stably at rated thermal power. The company stated that the event caused no radiological impact on the environment. The loss-of-field alarm is used to indicate an abnormal state in the magnetic field generated inside the generator. Following the incident, Kansai Electric conducted on-site inspections of equipment related to generator magnetic field establishment, including the generator, exciter, and automatic voltage regulator (AVR). Among these, the exciter is used to establish the magnetic field for the generator...

2026-08-19