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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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August 2024
Nuclear Technology
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Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Salvatore Massaiu, Alexandra Fernandes (IFE), invited
Proceedings | Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technolgies (NPIC&HMIT 2019) | Orlando, FL, February 9-14, 2019 | Pages 122-131
The increasing digitalization of nuclear power plants’ main control rooms questions the validity of Human Reliability Analysis (HRA) estimates for tasks that were formerly performed by acquiring information on analog panels. This paper presents a re-analysis of two experiments conducted at the Halden Reactor Project that employed the micro-task method for comparing different types of digital and analogue displays. The experiments were conducted with licensed operators at a U.S. power plant training simulator and at the HAMMLAB research simulator in Norway. In the re-analysis the tasks are classified according to two HRA reference sources for human error probabilities, THERP and KAERIs’ HuREX, in order to assess (a) the operators’ reliability on identification tasks, and (b) the impact of the HSI type (digital displays vs. analogue panels). The results show that error-rates for decontextualized micro-tasks are much higher than HRA estimates for the corresponding tasks in average industrial conditions. The advantage of the analog panels over the digital displays was small and not statistically significant, despite the experimental set-up that benefitted the familiar panels. Error rate differences between task types are larger than the differences attributable to the HSI type. Finally, the observed error rates relative differences across tasks are fairly consistent with THERP reference values but not with KAERIs. The results stress the importance of task modelling above HSI concerns, and the risk of overestimating the reliability of apparently easy tasks.