The article below was originally published in the March 2021 issue of Nuclear News. (Also included in that issue is a great review article from Lake Barrett outlining the current status of the decontamination and decommissioning going on at Fukushima .) That month marked 10 years since the Tōhoku earthquake and tsunami devastated Japan and crippled the Fukushima plant. The words that follow remain timely, since various news outlets continue to report on the dangers of Fukushima's wastewater without providing context to the Japanese plan to discharge it.

Washington, D.C. – The American Nuclear Society (ANS) supports the start of Japan’s controlled release of re-treated, diluted tritium wastewater into the sea from the Fukushima Daiichi Nuclear Power Plant (NPP), which sustained damage in the aftermath of a 2011 earthquake and tsunami.

We’ve all seen the headlines such as “Should Japan Dump Fukushima's Radioactive Water into the Ocean?” along with “Japan Set to Pour Fukushima Waste into Pacific, Irking China” and “Japan Is Slowly but Surely Releasing Wastewater from the Fukushima Nuclear Plant into the Pacific Ocean.” The most recent spate of fearmongering was triggered by the IAEA’s July 4 announcement that the agency had finished its independent assessment of Japan’s plans to release the treated wastewater stored at the Fukushima Daiichi nuclear power station and found the plan “consistent with IAEA Safety Standards.”

The Defense Nuclear Facilities Safety Board (DNFSB) is scheduled to visit the Department of Energy’s Savannah River Site in South Carolina the week of May 8 to discuss ongoing safety concerns and the protection of the public and workforce, as well as the DOE’s effectiveness in addressing those concerns.

A recurring leak of water containing tritium has led to the temporary shutdown of Xcel Energy's Monticello nuclear power plant, in Minnesota.

“While the leak continues to pose no risk to the public or the environment, we determined the best course of action is to power down the plant and perform the permanent repairs immediately,” said Chris Clark, president of Xcel Energy–Minnesota, North Dakota, and South Dakota, in a March 23 news release. “We are continuing to work with and inform our state, federal, city, and county leaders in the process.”

Powering down the reactor to shutdown condition started last Friday.

An Xcel Energy news release issued last week regarding the leak of some 400,000 gallons of tritium-containing water at Minnesota’s Monticello nuclear power plant in 2022 has sparked a flood of news stories over the past few days—in large part because the general public had previously been unaware of the leak. (A low-level beta emitter, tritium is a common byproduct of nuclear reactor operation.)

The trouble with tritium is there is no trouble with tritium.

At any level outside the laboratory, either experimental or manufacturing, tritium is harmless. Every year, we routinely release millions of gallons of slightly tritiated water to the ocean, large lakes, and large rivers from almost every commercial nuclear reactor in the world, and have done so for decades, all in accordance with globally accepted nuclear safety standards. And no adverse effects on the environment or humans have ever been seen.

When the Department of Energy announced Innovation Network for Fusion Energy (INFUSE) awards earlier this month, Savannah River National Laboratory was named a recipient of two of the 18 awards. SRNL released a statement on July 19 explaining how a national lab with a long history of supporting environmental management and national security missions can lend a hand in the development of future commercial fusion power.

The Department of Energy’s Office of Environmental Management (EM) is managing the release of tritiated water using a 62-acre plantation of pine trees and other natural resources to limit radioactively contaminated groundwater from reaching waterways on the Savannah River Site in South Carolina.

Laurentis Energy Partners, a subsidiary of Ontario Power Generation (OPG), has launched a new program to produce helium-3. The He-3 will be obtained from tritium stored at OPG’s Darlington nuclear power plant, a four-unit CANDU station located about 100 kilometers east of Toronto.

Darlington houses one of the world’s largest reserves of tritium, which is a by-product of the heavy water used in CANDU reactors.

Using basic hand tools and remote manipulators, operators at Savannah River Nuclear Solutions (SRNS) were able to reduce radiation exposure to workers performing cutter head maintenance in the Savannah River Site’s Tritium Extraction Facility (TEF).

According to SRNS, the innovative procedure proved to be an excellent example of real-world application of As Low As Reasonably Achievable (ALARA) principles of time, distance, and shielding.

Dickman

Paul Dickman, former senior official with the Nuclear Regulatory Commission who served as the study director for the ANS Special Committee on the Fukushima Daiichi accident, discussed Japan’s plans to dispose of Fukushima wastewater during an appearance on CNBC’s Street Signs Asia with hosts Amanda Drury and Tanvir Gill on April 16.

Appearing on the show as an ANS spokesman, Dickman assured the hosts that there will be no negative environmental impact from releasing the advanced liquid waste processing system (ALPS)-treated water into the Pacific Ocean. “The Japanese government has done an extraordinary effort to mitigate any harm that would be from the release of this water,” Dickman said. “Frankly, they’ve diluted it to such an extent that it would hardly be detectable above background (radiation).”

The Japanese government will soon announce the decision to dispose of stockpiled Fukushima wastewater into the Pacific Ocean, according to an AP News story published last Friday. The decision is years in the making and follows the guidelines from a panel of government-appointed experts named the Subcommittee on Handling of the ALPS-Treated Water (ALPS Subcommittee).

The Fukushima Daiichi site before the accident. All images are provided courtesy of TEPCO unless noted otherwise.

It was a rather normal day back on March 11, 2011, at the Fukushima Daiichi nuclear plant before 2:45 p.m. That was the time when the Great Tohoku Earthquake struck, followed by a massive tsunami that caused three reactor meltdowns and forever changed the nuclear power industry in Japan and worldwide. Now, 10 years later, much has been learned and done to improve nuclear safety, and despite many challenges, significant progress is being made to decontaminate and defuel the extensively damaged Fukushima Daiichi reactor site. This is a summary of what happened, progress to date, current situation, and the outlook for the future there.