Radwaste Solutions

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.

Scientists at Lawrence Livermore National Laboratory, working in collaboration with researchers at Penn State University and Harvard Medical School, have discovered a new mechanism by which radionuclides could spread in the environment.

The research, which has implications for nuclear waste management and environmental chemistry, was published in the Journal of the American Chemical Society on September 20.

For any nuclear power plant that has been permanently shut down, site restoration is the ultimate decommissioning goal when contracting with a utility to demolish a facility. The task, however, is not as simple as mobilizing heavy equipment and waving a wrecking ball or planting explosives to implode the facility, then loading up the debris and sending it to a landfill.

There is a real science and engineering approach necessary to safely restore the land to its original state. That has been the goal for EnergySolutions over the past decade as the company works to safely decommission shuttered nuclear power plants—packaging, transporting, and disposing of the waste, and restoring the sites for whatever reuse the owners and host communities see fit.

The German government has announced that it is closing the Gorleben salt mine in the Wendland region of Lower Saxony, officially removing the site from consideration as a repository for radioactive waste. Gorleben became a target of antinuclear protests after being proposed as a potential repository in the 1970s.

The Department of Energy is preparing to demolish two large, complex facilities at the Nevada Nuclear Security Site with ties to historical nuclear propulsion rocket development and testing programs. The DOE’s Environmental Management (EM) Nevada Program and its environmental program services contractor, Navarro Research and Engineering, have begun characterization and hazard reduction work on the site’s Engine Maintenance, Assembly, and Disassembly (EMAD) and Test Cell C (TCC) complexes.

The Nuclear Regulatory Commission has issued a license to Interim Storage Partners (ISP), a joint venture of Waste Control Specialists and Orano USA, to construct and operate a consolidated interim storage facility for spent nuclear fuel in Andrews, Texas. Issued on September 13, the license comes just four days after Texas governor Greg Abbott signed a bill to block such a facility from being built in the state.

The Savannah River Site is reducing the flow of hazardous and radioactive metal contaminants to South Carolina’s rivers and streams by injecting a mix of clean water and baking soda into the site’s groundwater. The base mix neutralizes groundwater that has become acidic as a result of SRS’s chemical separations work, helping restrict the flow of contaminants.

The Nuclear Regulatory Commission has extended its orders transferring the licenses for the La Crosse and Zion nuclear power plants from EnergySolutions back to the plant owners until late 2022. This is the third time the NRC has extended the effectiveness of the license transfer orders for the decommissioned plants since approving them in 2019.

Pamela Cowen

Having spent more than 25 years in the commercial nuclear power community, Pam Cowan has spent time in both the front- and back-end operations of nuclear power. It is this experience that she draws upon as the senior vice president and chief operating officer of Holtec Decommissioning International (HDI) to help her build a growing fleet of power plants undergoing decommissioning and demolition.

Cowan, who came to HDI from the Nuclear Energy Institute, is also senior vice president of decommissioning and regulatory affairs for HDI parent company Holtec International and president of the Nuclear Asset Management Company, the owner of the plants. Cowan also serves as a member of the board of directors of Comprehensive Decommissioning International, a decommissioning general contractor, jointly owned by Holtec and SNC-Lavalin.

Radwaste Solutions spoke to Cowan about Holtec’s fleet approach to decommissioning and her plans for HDI.

(Editor's note: Soon after this article was published in Radwaste Solutions, Westinghouse Electric Company announced that Pam Cowan had been appointed president of the company's Americas operating plant services unit. Cowan takes over the business on September 21, following the retirement of current president, David Howell.)

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.

NorthStar Group Services is being allowed to intervene in Wisconsin’s regulatory review of the sale of the Kewaunee nuclear power plant by Dominion Energy to EnergySolutions for decommissioning. An administrative law judge granted NorthStar permission on September 7 to participate in the Public Service Commission of Wisconsin’s review of the transaction.

A nearly yearlong effort to de-tension and remove more than 400 steel cables, known as tendons, from the two containment domes of the San Onofre Nuclear Generating Station (SONGS) was recently completed, with only one minor first aid incident recorded, according to Southern California Edison.

Over the past decade, the Department of Energy has been collecting data on nuclear power plants to help plan for the eventual removal of spent nuclear fuel from the sites, performing site evaluations to assess transportation infrastructure and the transportability of spent fuel.

The Berkeley, Calif.-based startup Deep Isolation has contracted with Slovenia’s radioactive waste management organization ARAO to conduct a feasibility study on the use of deep boreholes to dispose of the country’s spent research reactor fuel.

Crews are in the homestretch of completing demolition of Department of Energy–owned buildings at the former Energy Technology Engineering Center (ETEC) site in Ventura County, California, the agency reported on August 24.

Orano has delivered its first TN-LC spent nuclear fuel transport cask to Korea Hydro and Nuclear Power Company. The first use of the cask is planned for an international transport between South Korea and Sweden by the end of 2021.

KHNP received a license in June for the TN-LC transport cask from the Nuclear Safety and Security Commission, South Korea’s regulatory agency, for the transport of high-burnup spent fuel.

Westinghouse will segment and dispose of the reactor internals and pressure vessels at Sweden’s Ringhals-1 and Ringhals-2 under a deal announced last week with plant owner Vattenfall. Unit 2, a pressurized water reactor, and Unit 1, a boiling water reactor, were shut down in 2019 and 2020, respectively, after operating for more than 40 years.

The Department of Energy is celebrating a major milestone in its tank waste mission at the Hanford Site near Richland, Wash. DOE tank operations contractor Washington River Protection Solutions has finished construction of the pipeline that will carry treated waste from an underground tank to the Waste Treatment and Immobilization Plant (WTP) for vitrification.

While it has been known for decades that bacteria known as Geobacter could clean up uranium waste, researchers at Michigan State University recently uncovered the biological mechanism behind the bacteria’s ability to do it.

DGR Grant Construction will construct a safe-storage enclosure over the K East Reactor building at the Department of Energy’s Hanford Site in Washington state. Two construction subcontracts, worth about $9.5 million, were awarded to the Richland, Wash.–based company by Central Plateau Cleanup Company, the DOE’s Richland Operations Office site cleanup contractor.