Radwaste Solutions

The Department of Energy’s Office of Environmental Management (EM) has made great progress in accomplishing its cleanup of legacy radioactive waste but has yet to tackle its most challenging tasks, including the treatment of liquid tank waste at the Hanford, Idaho, and Savannah River sites. That was the consensus of the DOE-EM officials who took part in a panel session of the 2023 Waste Management Symposia, held February 26–March 2 in Phoenix, Ariz.

The rapid changes in the nuclear energy industry over the last decade, driven in part by fluctuating energy market prices and an aging fleet of reactors, have led to the closure of multiple reactors in the United States and other countries. These closures have increased the need for larger and more efficient ways to manage low-level radioactive waste processing and transport capacities. The safe transport of radioactive material is a key component of the overall nuclear industry reliability. Though sometimes perceived as a bottleneck and costly, it is necessary to send waste material to disposal.

The Nuclear Regulatory Commission has delayed issuing a decision on the licensing of Holtec International’s proposed consolidated interim storage facility (CISF) in New Mexico for at least two more months. In a letter sent to Holtec on March 20, the NRC said the delay was “due to unforeseen resource constraints.”

Progress continues on a new utility shaft at the Department of Energy’s Waste Isolation Pilot Plant in New Mexico as shaft-sinking crews recently surpassed the midway point at a depth of 1,076 feet. When complete, the full shaft depth will be 2,275 feet, with the team now halfway to the WIPP repository depth of 2,150 feet.

New Mexico has passed legislation aimed at preventing Holtec International from constructing and operating a consolidated interim storage facility (CISF) for spent nuclear fuel in the state. On March 17, hours after being passed by the New Mexico House on a 35-28 vote, Democratic Gov. Michelle Lujan Grisham signed SB 53, which prohibits the storage and disposal of radioactive waste in New Mexico without the state’s consent.

Attracting more than 2,000 attendees, the 2023 Waste Management Symposia was held February 26–March 2 in Phoenix, Ariz. For many, this year’s conference was a return to business as usual, with a packed exhibit hall and well-attended technical session, as the upheaval brought about by the pandemic that began three years earlier seemed a thing of the pasts. Not that those who gathered in Phoenix threw any caution to the unseasonably cold and rainy winds that descended across Arizona this year.

Workers change out spent 27,000-pound TSCR filter columns and place them on a nearby storage pad during a planned outage. (Photo: DOE)

Following a second planned maintenance outage, the Tank-Side Cesium Removal (TSCR) system at the Hanford Site in Washington state has resumed processing liquid tank waste, the Department of Energy’s Office of Environmental Management (EM) announced on March 14.

According to EM, its Office of River Protection (ORP) and contractor Washington River Protection Solutions processed more than 25,000 gallons of waste during the previous week and has treated a total of 406,000 gallons of radioactive liquid waste since TSCR began operations early last year.

A key component in Hanford’s Direct-Feed Low-Activity Waste program for treating tank waste, TSCR removes radioactive cesium and solids from tank waste and delivers low-activity waste to a nearby million-gallon tank, where it is staged until it can be fed to the Waste Treatment and Immobilization Plant for vitrification.

Outage improvements: During outages, workers change out filter columns that remove radioactive solids during waste processing, perform maintenance, and apply lessons learned from operations. According to EM, many improvements to the treatment system during outages over the past year came from recommendations made by workers and contractor and federal staff on the project team.

Hosted by Waste Management Symposia, the annual Waste Management Conference is widely regarded as the premier international conference on the management of radioactive material and related topics. The theme of this year’s conference, being held February 26-March 3 at the Phoenix Convention Center in Arizona, is “Planning for the Future: Innovation, Transformation, Sustainability.” The featured country for 2023 is France, which will be represented by numerous panels, papers, posters, and exhibits demonstrating the country’s continuous innovation and pragmatism in the management of the nuclear fuel cycle. The featured Department of Energy Office of Environmental Management topic is “EM’s Transformation in Radioactive Liquid Tank Waste Management.”

Each year, the two best oral presentations/papers from the previous year’s conference are recognized. Honoring the highest-quality presentations, the American Nuclear Society and the American Society of Mechanical Engineers each present an award for best presentation/paper. The following are the abstracts for the best ANS and ASME papers of 2022. The full papers are available to 2023 WM Conference participants through the WM Symposia website, at wmsym.org.

Nuclear dismantling and decommissioning company APTIM said it is on schedule to wrap up field activities decommissioning the U.S. Navy’s Surface Ship Support Barge (SSSB) by April, with project closure slated for June. The company announced yesterday that its team has completed the demolition of the barge’s former spent fuel water pool, also referred to as the “wet pit,” or the heart of the vessel.

When it comes to managing nuclear waste, technology is transforming the way some of the most problematic waste is handled. The idea to transform nuclear waste into glass was developed back in the 1970s as a way to lock away the waste’s radioactive elements and prevent them from escaping. For more than 40 years, vitrification has been used for the immobilization of high-level radioactive waste in many countries around the world, including the United States.

Two Department of Energy sites recently announced training partnerships with local technical and community colleges designed to offer students hands-on work experience while building a workforce pipeline to waste management jobs.

The second of three machines that will be used to safely remove waste from the Magnox Swarf Storage Silo at the Sellafield nuclear site in the United Kingdom has successfully been assembled, it was announced by Sellafield Ltd., a subsidiary of the U.K. government’s Nuclear Decommissioning Authority.

A video showing how waste is removed and the Magnox Swarf Storage Silo prepared for decommissioning has been posted to YouTube and can be found here.

Hanford manager Brian Vance discusses the DFLAW program during a panel session at the 2023 Waste Management Symposia. (Photo: DOE)

Hanford’s waste vitrification operations are unlikely to start by the Department of Energy’s year-end goal, said Brian Vance, manager of the DOE’s Office of River Protection and Richland Operations Office for the Hanford Site in Washington state. The DOE is working to meet its obligations to begin processing Hanford’s low-level radioactive tank waste as part of its Direct-Feed Low-Activity Waste (DFLAW) program.

“The probability for 2023 is very low,” Vance said, regarding the department’s plan to begin vitrifying the tank waste. Vance made his remarks during a panel session of the 2023 Waste Management Symposia in Phoenix, Ariz., on February 28.

On December 1, 2021, the Department of Energy issued a request for information (RFI) asking for public feedback on using consent-based siting to identify sites for the interim storage of spent nuclear fuel. The department received more than 220 comments in response, and on September 15, 2022, the DOE released a report summarizing and analyzing those responses. That 57-page report, Consent-Based Siting: Request for Information Comment Summary and Analysis, will be followed by an updated consent-based siting process document.

The DOE’s consent-based siting initiative is being led through the DOE’s Office of Nuclear Energy. To learn more about that initiative and the consent-based siting process, Radwaste Solutions spoke with the DOE’s Kim Petry, acting associate deputy assistant secretary, Spent Fuel and Waste Disposition; Erica Bickford, acting office director, Integrated Waste Management; and Natalia Saraeva, team lead, Consent-Based Siting.

The Department of Energy has announced that tank operations contractor Washington River Protection Solutions (WRPS) and subcontractor Atkins are making progress at the Hanford Site in Washington state in their preparations to provide replacement melters to treat radioactive and chemical tank waste for the site’s Direct-Feed Low-Activity Waste program.

New legislation that would require the cleanup of Jana Elementary School in suburban St. Louis was introduced in the Senate by Sen. Josh Hawley (R., Mo.). The Justice for Jana Elementary Act would also order the United States Army Corps of Engineers (USACE) to test all properties in the Hazelwood School District, of which Jana Elementary is a part.

Waste management startup Deep Isolation announced that it has entered into a mentor-protégé agreement with Salado Isolation Mining Contractors (SIMCO), the new Bechtel National–led management and operations contractor for the Department of Energy’s Waste Isolation Pilot Plant in New Mexico.

The Nuclear Regulatory Commission announced that it has released the site of the La Crosse boiling water reactor in Wisconsin for unrestricted public use. The action comes after the NRC found that EnergySolutions subsidiary LaCrosseSolutions had met the agency’s radiation protection standards in decommissioning the nuclear power plant.

The Energy Communities Alliance (ECA), an organization of local communities near Department of Energy national defense sites, has released a new report urging the DOE to prioritize finding disposal pathways for the radioactive waste it is obligated to clean up.

According to the ECA, the DOE could potentially save hundreds of billions of dollars in cleanup costs by using its available tools and implementing the recommendations contained in the report, Disposal Drives Cleanup: Re-Energizing Momentum for Disposal Solutions for Radioactive Waste.

Orano Group subsidiary Orano NPS announced that Swiss electrical utility Axpo has selected the company to provide its TN Eagle used nuclear fuel casks over the entire operating period of the Leibstadt nuclear power plant in Switzerland.