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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

Shimane Nuclear Power Station Unit 2 Resumes Power Generation

Chugoku Electric Power Co. reported on August 19 that Unit 2 of the Shimane Nuclear Power Station resumed power generation at 2:00 p.m. that day through generator synchronization and began supplying electricity to the grid. Unit 2 of the Shimane Nuclear Power Station uses a boiling water reactor with a rated generating capacity of 820,000 kilowatts. Chugoku Electric Power Co. stated that it will prioritize safety, conduct comprehensive inspections of equipment operating conditions, and prepare for the unit to resume commercial operation as scheduled on September 16. ...

2026-08-19

Kansai Electric says Rokkasho reprocessing plant delay does not change target of starting operation in fiscal 2027

On August 18, officials from Japan's Agency for Natural Resources and Energy (ANRE) and Kansai Electric Power Company (KEPCO) visited the Aomori Prefectural Government to explain the construction and operation schedule of the spent fuel reprocessing plant under construction in Rokkasho Village, Aomori Prefecture. The facility is a key project in Japan's nuclear fuel cycle system and is also listed as one of the receiving sites for spent fuel transported from nuclear power plants in Fukui Prefecture. Kansai Electric reiterated that even if the completion of the Rokkasho reprocessing plant is delayed from its original schedule within the current fiscal year, the target of starting operation within fiscal 2027 remains unchanged. The company stated that under the current spent fuel transport roadmap, the transport volume from fiscal 2028 onward is not expected to be significantly affected; if construction...

2026-08-19

Ikata Nuclear Power Station Unit 1 Decommissioning Phase 2 Plan Approved by Experts

An expert organization in Ehime Prefecture, Japan, regarding safety management at the Ikata Nuclear Power Station recently held a meeting to discuss the decommissioning plan for Unit 1 of the station. The report formed at the meeting deemed it appropriate for the unit to enter the second phase of decommissioning in fiscal year 2027. The meeting was convened by the Nuclear Safety Expert Subcommittee under the Ikata Nuclear Power Station Environmental Safety Management Committee. This committee is responsible for providing advice to the Governor of Ehime Prefecture on safety management at the Ikata Nuclear Power Station. At the meeting, eight academic experts reviewed the decommissioning plan for Unit 1. The decommissioning of Unit 1 at the Ikata Nuclear Power Station began in 2017 and is divided into four phases overall, planned to last approximately 40 years. Currently, the decommissioning work...

2026-08-19