Thinking outside the box, the nuclear sector puts a new spin on a pharmaceutical tool.
Large-scale testing is done on the Spinionic rotating bed reactor system.
We live in a world where we are continually driven to increase efficiency while decreasing costs—to do more with less. The nuclear industry is no different. Developing innovative techniques or adapting creative ideas found in other industries can support that pursuit to reduce cost and, in this case, volumes of waste, while providing program certainty. Such actions build confidence in our industry and allow nuclear power to continue to be part of the narrative of our clean-energy future.
The partial collapse of PUREX Tunnel 1 in 2017 prompted a review of Hanford’s maintenance of the site’s unused, contaminated buildings.
A report released to the public on February 20 by the Government Accountability Office concluded that maintenance inspections at several contaminated excess facilities at the Department of Energy’s Hanford Site, near Richland, Wash., have not been comprehensive and that there are areas of some facilities that personnel infrequently or never enter, either physically or by remote means, to conduct inspections. The GAO reviewed surveillance and maintenance (S&M) requirements and activities at 18 of Hanford’s approximately 800 excess facilities that require cleanup and found that improvements to the site’s S&M program are needed.
ASME Best Oral Presentation/Paper Waste Management 2019
March 10, 2020, 9:02AMRadwaste SolutionsThao Do, Jiju Joseph, Giles Whitaker, Barb Noye, Vasile Bostan, Don Jarron, and J. Clara Wren As nuclear power plants age and retire from service, many countries face significant challenges concerning the safe long-term storage and disposal of large volumes of low- and intermediate-level radioactive wastes (L&ILW). In Canada, Ontario Power Generation (OPG) is currently in the process of obtaining regulatory approval for a deep geological repository (L&ILW DGR) for such wastes from decommissioning and refurbishment of its heavy water reactors. OPG is exploring innovative methods and technologies to improve safety and reduce the processing, transportation, and disposal costs of these wastes. The volumes of metallic waste are of particular concern, because when metal corrodes it produces hydrogen that could lead to pressure buildup in the L&ILW DGR.
ANS Best Oral Presentation/Paper Waste Management 2019
March 10, 2020, 8:42AMRadwaste SolutionsLaura Merlo-Sosa, Hugh Boniface, Richard Prokopowicz, and Sam Suppiah Heavy water is used both for moderating nuclear fission and transporting heat in CANDU reactors. As a result of heavy water use in these systems, tritium is produced in small quantities from thermal neutron activation of deuterium. The presence of tritium in the heavy water contributes to the radiation dose of the reactor staff and radioactive emission from the reactor facility. Tritium dose is usually controlled through design and operating procedures that minimize leaks and limit exposure to the tritiated water. Many of the CANDU operators have also reduced the operational tritium concentration through detritiation of the heavy water from the reactor. Detritiation is carried out in a centralized facility, such as the Tritium Removal Facility in Darlington, which provides this service to Ontario’s nuclear reactor fleet. Detritiation reduces both tritium emission and dose to workers and the public from reactor operation.
An updated polymer gel from Argonne National Laboratory proves to be effective in removing radioactive contaminants from a legacy site.
The gel is applied to an area (left), where it is allowed to work for two to three hours before being removed. The final activity of the cleaned area (right) was counted using HPGe and Ludlum alpha/beta radiation detectors. Photos courtesy of ANL.
Current techniques for radiological decontamination often involve debasing or demolishing structures to contain contaminated dust and haul debris away. This is a costly method of decontaminating buildings and structures. If, however, effective nondestructive methods can be found, significant savings are possible. One such method, based on new research from engineers at the Department of Energy’s Argonne National Laboratory in Lemont, Ill., is now available.
The Department of Energy’s Office of Environmental Management (EM) has issued an outline of planned accomplishments over the next decade to capitalize on progress it has made in cleaning up former government weapons and research sites over its first 30 years. The release of the 66-page report, A Time of Transition and Transformation: EM Vision 2020-2030, was announced on March 9 by William “Ike” White, DOE senior advisor for environmental management, during the 2020 Waste Management Conference in Phoenix, Ariz.
Bag-out operations can pose many issues to the TRU waste handling and disposal process. Among these are operator and facility safety, operational time, excess waste volume, and increased shipping costs to a waste repository.