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2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
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Groundwater data pave the way for Environmental Management Disposal Facility at Oak Ridge
Results of a two-year study of groundwater levels at the site of the planned Environmental Management Disposal Facility (EMDF) in Oak Ridge, Tenn., have been released, revealing that the levels fell at a slower-than-expected rate. The collection of data on groundwater levels during two wet seasons, conducted by the Oak Ridge Office of Environmental Management and the contractor United Cleanup Oak Ridge, formed the core of a groundwater field demonstration study which will help inform the final design of the EMDF landfill.
Heather D. Medema, Kateryna Savchenko, Ronald L. Boring, Thomas A. Ulrich (INL)
Proceedings | Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technolgies (NPIC&HMIT 2019) | Orlando, FL, February 9-14, 2019 | Pages 132-141
Nuclear power plants are gradually digitizing their control rooms. This transition has been slow to come in the United States due to the reliability of existing equipment relative to the age of the plants; the stockpiled availability of analog spare parts; and the conservative, change-aversive nature of the nuclear industry. Meanwhile, plants saw the birth of human reliability analysis (HRA), which was largely developed to meet safety and regulatory requirements specifically in the nuclear industry. HRA reflected the as-built analog control nature of the plants, with little call to catalog and quantify emerging digital technologies that were not yet deployed. Other safety critical industries have been slower to embrace HRA, and a stumbling block remains their inability to generalize the methods to address the now ubiquitous digital control systems in these industries. New plant builds and control room modernization now present the need to ensure that HRA adequately covers digital control technologies being deployed in nuclear power plants. Digital systems present different human error opportunities, and the methods have not been adapted to this change. In this paper, we review considerations in operator performance that accompany the transition from analog to digital controls. These considerations drive new directions in HRA that will address both nuclear and non-nuclear digital controls. Finally, the technology shift from analog to digital control room creates new vulnerability for cyber threats.