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This photo released by Tokyo Electric Power Company Holdings (TEPCO), shows a robot, top right, clips a tiny gravel of what it believed to be melted fuel debris at the No. 2 reactor of the Fukushima Daiichi nuclear power plant in Okuma, Fukushima, northern Japan, on Oct. 30, 3024. (Tokyo Electric Power Company Holdings via AP)

A tiny grain of nuclear fuel is pulled from ruined Japanese nuclear plant, in a step toward cleanup

By Mari Yamaguchi - Associated Press

FILE - Former Tokyo Electric Power Co. (TEPCO) chairman Tsunehisa Katsumata arrives at Tokyo District Court in Tokyo Thursday, Sept. 19, 2019. (Satoru Yonemaru/Kyodo News via AP, File)

TEPCO ex-chair at time of Fukushima nuclear disaster dies at 84 while on trial over responsibility

By Mari Yamaguchi - Associated Press

This aerial view shows the wrecked Fukushima Daiichi nuclear power plant in Okuma town, northeastern Japan, on Aug. 24, 2023. A drone small enough to fit in one's hand flew inside one of the damaged reactors at the wrecked nuclear power plant Wednesday, Feb. 28, 2024, in hopes it can examine some of the molten fuel debris in areas where earlier robots failed to reach. (Kyodo News via AP, File)

A small drone flies into a damaged Fukushima nuclear reactor for the first time to study melted fuel

By Mari Yamaguchi - Associated Press

The Fukushima Daiichi nuclear power plant, damaged by a massive March 11, 2011, earthquake and tsunami, is seen from the nearby Ukedo fishing port in Namie town, northeastern Japan, on Aug. 24, 2023. The operator of the wrecked Fukushima Daiichi nuclear power plant said there are no safety worries or changes to the plant’s decommissioning plans even though the deadly Jan. 1, 2024 earthquake in Japan’s north-central region caused some damages to a local idled nuclear plant, which rekindled safety concerns and prompted a regulatory body to order a close examination. (AP Photo/Eugene Hoshiko, File)

The ruined Fukushima nuclear plant leaked radioactive water, but none escaped the facility

By Mari Yamaguchi - Associated Press

Tokyo Electric Power Company Holdings executive Junichi Matsumoto, center, who is in charge of the treated water release from the Fukushima Daiichi nuclear power plant, announces that the first batch of treated and diluted radioactive wastewater will be released into the Pacific Ocean later Thursday from the plant, in the Okuma town on the northeastern coast of Japan, Thursday, Aug. 24, 2023. The operator of the tsunami-wrecked Fukushima Daiichi nuclear power plant will begin releasing the first batch of treated and diluted radioactive wastewater into the Pacific Ocean later Thursday, the utility executives said. (AP Photo/Mari Yamaguchi)

China bans seafood from Japan after the Fukushima nuclear plant begins its wastewater release

By Mari Yamaguchi - Associated Press

Japanese Prime Minister Fumio Kishida answers questions from journalists upon his arrival at the prime minister's office on Tuesday, Aug. 22, 2023, in Tokyo. (Rodrigo Reyes Marin/Pool Photo via AP)

Japan to start releasing Fukushima plant’s treated radioactive water into sea as early as Thursday

By Mari Yamaguchi - Associated Press

Junichi Matsumoto, an official of Tokyo Electric Power Company Holdings (TEPCO), speaks in an interview with The Associated Press at the TEPCO headquarters in Tokyo, Friday, July 28, 2023. Matsumoto, a top official in charge of the Fukushima Daiichi nuclear power plant said an upcoming release of treated radioactive water into the sea more than 12 years after the meltdown disaster marks “a milestone,” but it's still an initial step of the daunting task of the decades-long decommissioning process that still remain. (AP Photo/Hiro Komae)

Fukushima plant official says the coming release of treated water a milestone for decommissioning

By Mari Yamaguchi - Associated Press

A work ship is seen off shore where Tokyo Electric Power Company Holdings said it installed the last piece of an undersea tunnel dug to be used to release the water offshore, during a media tour to the Fukushima Daiichi nuclear power plant in Fukushima, northern Japan Monday, June 26, 2023. All equipment needed for the release into the sea of treated radioactive wastewater from the wrecked Fukushima nuclear plant has been completed and will be ready for a safety inspection by Japanese regulators this week, the plant operator said Monday, as opposition to the plan continues in and outside Japan over safety concerns. (Kyodo News via AP)

Regulators begin final safety inspection before treated Fukushima wastewater is released into sea

By Mari Yamaguchi - Associated Press

FILE - This photo shows tanks (in gray, beige and blue) storeing water that was treated but is still radioactive after it was used to cool down spent fuel at the Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, northeastern Japan, on Feb. 27, 2021. Japan’s nuclear regulator on Friday, July 22, 2022, approved the release of treated radioactive wastewater from the wrecked Fukushima nuclear power plant into the sea next year. (AP Photo/Hiro Komae, File)

Japan OKs preparation step for Fukushima plant water release

By Mari Yamaguchi - Associated Press

Products are scattered at a convenience store in Fukushima, northern Japan Wednesday, March 16, 2022, following an earthquake. A powerful earthquake shook off the coast of Fukushima in northern Japan on Wednesday, triggering a tsunami advisory. (Kyodo News via AP)

7.3 magnitude quake hits north Japan, tsunami alert issued

By Mari Yamaguchi - Associated Press

FILE - In this April 13, 2021, file photo, environmental activists wearing a mask of Japanese Prime Minister Yoshihide Suga and protective suits perform to denounce the Japanese government's decision to release treated radioactive Fukushima water, near the Japanese Embassy in Seoul, South Korea. Japan’s government adopted an interim plan Tuesday, Aug. 24, 2021 that it hopes will win support from fishermen and other concerned groups for a planned release into the sea of treated but still radioactive water from the wrecked Fukushima nuclear plant. (AP Photo/Lee Jin-man, FIle)

Fukushima nuclear water to be released via undersea tunnel

By Mari Yamaguchi - Associated Press

FILE - This Sept. 30, 2017, aerial file photo shows the reactors of No. 6, right, and No. 7, left, at Kashiwazaki-Kariwa nuclear power plant, on the northern Japanese coast in Niigata prefecture. The operator of the Fukushima nuclear plant that was destroyed in a 2011 disaster said Wednesday it will accept a penalty imposed by regulators over sloppy anti-terrorism measures at another nuclear plant it runs, a step that will prevent its desperately sought restart of the facility for at least a year. (Kyodo News via AP, File)

Japan regulator bans nuke plant restart over lax safeguards

By MARI YAMAGUCHI - Associated Press

FILE - In this Dec. 2, 2019, file photo released by Tokyo Electric Power Co. (TEPCO), shows melted fuel taken by a telescopic robot inside of the primary containment vessel of Unit 2 reactor at the Fukushima Dai-ichi plant in Okuma, northeast Japan. Japan’s government and the operator of a wrecked Fukushima nuclear plant said Thursday, Dec. 24, 2020 a removal of melted fuel will be postponed by about one year until late 2022 due to delayed development of a robotic arm in Britain amid the coronavirus pandemic. (Tokyo Electric Power Co. via AP, File)

Melted fuel removal at Fukushima delayed by pandemic

By MARI YAMAGUCHI - Associated Press

Prosecutors appeal TEPCO acquittal in Fukushima case

By MARI YAMAGUCHI - Associated Press

In this March 16, 2011, file photo released by Tokyo Electric Power Co. via Kyodo News, smoke billows from wrecked unit 3 at Fukushima Dai-ichi nuclear power plant in Okuma town, Fukushima prefecture, northeastern Japan. (Tokyo Electric Power Co./Kyodo News via AP, File)

Japan court: TEPCO execs not guilty in Fukushima disaster

By Mari Yamaguchi - Associated Press

In this Jan. 25, 2018, file photo, a cooling pool where a total of mostly used 566 sets of fuel rods are stored underwater and covered by a protective net, waits to be removed in a step to empty the pool at Unit 3 of the Fukushima Dai-ichi nuclear power plant ahead of a fuel removal from its storage pool in Okuma, Fukushima Prefecture, northeast Japan. (AP Photo/Mari Yamaguchi, File)

Removal of fuel in pool at Fukushima’s melted reactor begins

By Mari Yamaguchi - Associated Press

IAEA urges Japan to take ample time in Fukushima cleanup

By MARI YAMAGUCHI - Associated Press

FILE - In this Feb. 23, 2017, file photo, an employee walks past storage tanks for contaminated water at the tsunami-crippled Fukushima Dai-ichi nuclear power plant of the Tokyo Electric Power Co. (TEPCO) in Okuma town, Fukushima prefecture, Japan. The operator of Japan's wrecked Fukushima nuclear plant said Friday, Sept. 28, 2018, that much of the radioactive water stored at the plant isn't clean enough and needs further treatment if it is to be released into the ocean. (Tomohiro Ohsumi/Pool Photo via AP, File)

Treated water at Fukushima nuclear plant still radioactive

By MARI YAMAGUCHI - Associated Press

Japanese Prime Minister Shinzo Abe (second from right, with a red helmet) is briefed about a chemical dam by Fukushima Dai-ichi nuclear power plant chief Akira Ono (second from left) as the lawmaker inspects an area along the coast between the No. 1 and No. 2 reactors during his tour of the tsunami-crippled plant in Okuma, Fukushima Prefecture, Japan, on Thursday, Sept. 19, 2013. (AP Photo/Japan Pool)

Japanese leader Shinzo Abe wants Fukushima nuke plant completely scrapped

By Mari Yamaguchi - Associated Press