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

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

News

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

2024-11-07 20:54 Last Updated At:21:00

TOKYO (AP) — A robot that has spent months inside the ruins of a nuclear reactor at the tsunami-hit Fukushima Daiichi plant delivered a tiny sample of melted nuclear fuel on Thursday, in what plant officials said was a step toward beginning the cleanup of hundreds of tons of melted fuel debris.

The sample, the size of a grain of rice, was placed into a secure container, marking the end of the mission, according to Tokyo Electric Power Company Holdings, which manages the plant. It is being transported to a glove box for size and weight measurements before being sent to outside laboratories for detailed analyses over the coming months.

Plant chief Akira Ono has said it will provide key data to plan a decommissioning strategy, develop necessary technology and robots and learn how the accident had developed.

The first sample alone is not enough and additional small-scale sampling missions will be necessary in order to obtain more data, TEPCO spokesperson Kenichi Takahara told reporters Thursday. “It may take time, but we will steadily tackle decommissioning,” Takahara said.

Despite multiple probes in the years since the 2011 disaster that wrecked the. plant and forced thousands of nearby residents to leave their homes, much about the site's highly radioactive interior remains a mystery.

The sample, the first to be retrieved from inside a reactor, was significantly less radioactive than expected. Officials had been concerned that it might be too radioactive to be safely tested even with heavy protective gear, and set an upper limit for removal out of the reactor. The sample came in well under the limit.

That's led some to question whether the robot extracted the nuclear fuel it was looking for from an area in which previous probes have detected much higher levels of radioactive contamination, but TEPCO officials insist they believe the sample is melted fuel.

The extendable robot, nicknamed Telesco, first began its mission August with a plan for a two-week round trip, after previous missions had been delayed since 2021. But progress was suspended twice due to mishaps — the first involving an assembly error that took nearly three weeks to fix, and the second a camera failure.

On Oct. 30, it clipped a sample weighting less than 3 grams (.01 ounces) from the surface of a mound of melted fuel debris sitting on the bottom of the primary containment vessel of the Unit 2 reactor, TEPCO said.

Three days later, the robot returned to an enclosed container, as workers in full hazmat gear slowly pulled it out.

On Thursday, the gravel, whose radioactivity earlier this week recorded far below the upper limit set for its environmental and health safety, was placed into a safe container for removal out of the compartment.

The sample return marks the first time the melted fuel is retrieved out of the containment vessel.

Fukushima Daiichi lost its key cooling systems during a 2011 earthquake and tsunami, causing meltdowns in its three reactors. An estimated 880 tons of fatally radioactive melted fuel remains in them.

The government and TEPCO have set a 30-to-40-year target to finish the cleanup by 2051, which experts say is overly optimistic and should be updated. Some say it would take for a century or longer.

Chief Cabinet Secretary Yoshimasa Hayashi said there have been some delays but “there will be no impact on the entire decommissioning process.”

No specific plans for the full removal of the fuel debris or its final disposal have been decided.

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)

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 device to remove debris from a reactor at the damaged Fukushima Nuclear power plant demonstrates to pinch a stone, as revealed in Kobe, western Japan, May 28, 2024. (Kyodo News via AP, File)

A device to remove debris from a reactor at the damaged Fukushima Nuclear power plant demonstrates to pinch a stone, as revealed in Kobe, western Japan, May 28, 2024. (Kyodo News via AP, File)

FILE - Tokyo Electric Power Company Holdings, also known as TEPCO, the operator of Japan's wrecked Fukushima Daiichi nuclear power plant, reveals a robot to be used to retrieve debris at the power plant in Kobe, western Japan, May 28, 2024. (Kyodo News via AP, File)

FILE - Tokyo Electric Power Company Holdings, also known as TEPCO, the operator of Japan's wrecked Fukushima Daiichi nuclear power plant, reveals a robot to be used to retrieve debris at the power plant in Kobe, western Japan, May 28, 2024. (Kyodo News via AP, File)

LAS VEGAS (AP) — Boise State, which twice boycotted regular-season matches with San Jose State, pulled out of the Mountain West women's volleyball tournament Wednesday night even after securing a spot in the semifinals against the Spartans.

San Jose State, which received six forfeit victories because of boycotts from Mountain West opponents, is seeded second in the conference tournament and received a first-round bye. Now the Spartans will advance all the way to Saturday's championship match rather than take the court Friday.

Boise State released a statement that read: “The decision to not continue to play in the 2024 Mountain West Volleyball Championship tournament was not an easy one. Our team overcame forfeitures to earn a spot in the tournament field and fought for the win over Utah State in the first round on Wednesday. They should not have to forgo this opportunity while waiting for a more thoughtful and better system that serves all athletes.”

The statement came hours after the Broncos defeated Utah State 25-19, 18-25, 25-20, 25-23 in the quarterfinals.

Boise State didn't commit immediately after the match to playing San Jose State. What went into its decision to withdraw from the tournament was unclear, whether it was by a team vote or more of a university decision.

The title match likely will go on as scheduled. San Jose State will play either top-seeded Colorado State or No. 5 San Diego State. Both teams played the Spartans this season rather than sit out.

San Jose State was expected to release a statement after Boise State's announcement.

Mountain West members Boise State, Wyoming, Utah State and Nevada as well as Southern Utah canceled games this season against the Spartans. Nevada’s players stated they “refuse to participate in any match that advances injustice against female athletes,” without providing further details.

A lawsuit was recently filed in Colorado by players from various schools against the conference and San Jose State officials calling for a Spartans player not to be allowed participation in the tournament, citing unspecified reports asserting there was a transgender player on the San Jose State volleyball team, even naming her.

U.S. Magistrate Judge S. Kato Crews in Denver ruled Monday that the player is allowed to play, and a federal appeals court upheld the decision the following day.

While some media have reported those and other details, neither San Jose State nor the forfeiting teams have confirmed the school has a trans women’s volleyball player. The Associated Press is withholding the player’s name because she has not publicly commented on her gender identity and through school officials has declined an interview request.

Wyoming and Nevada did not qualify for the tournament.

Participation of transgender women in women’s sports is apparently why the five teams canceled their games against San Jose State, and the topic became a hot political topic ahead of the recent election.

AP college sports: https://apnews.com/hub/college-sports

FILE - The San Jose State University Spartans line up for the playing of the national anthem and player introductions for their NCAA Mountain West women's volleyball game against the Colorado State University Rams in Fort Collins, Colo., on Oct. 3, 2024. (Santiago Mejia/San Francisco Chronicle via AP, file)

FILE - The San Jose State University Spartans line up for the playing of the national anthem and player introductions for their NCAA Mountain West women's volleyball game against the Colorado State University Rams in Fort Collins, Colo., on Oct. 3, 2024. (Santiago Mejia/San Francisco Chronicle via AP, file)

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