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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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IAEA report confirms safety of discharged Fukushima water
An International Atomic Energy Agency task force has confirmed that the discharge of treated water from Japan’s Fukushima Daiichi nuclear power plant is proceeding in line with international safety standards. The task force’s findings were published in the agency’s fourth report since Tokyo Electric Power Company began discharging Fukushima’s treated and diluted water in August 2023.
More information can be found on the IAEA’s Fukushima Daiichi ALPS Treated Water Discharge web page.
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.