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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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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Nuclear Science and Engineering
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.”
Jinok Lee, Jonghyun Kim (Chosun Univ), Yun Goo Kim (Korea Hydro & Nuclear Power)
Proceedings | Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technolgies (NPIC&HMIT 2019) | Orlando, FL, February 9-14, 2019 | Pages 1189-1194
Required time refers to the duration of time that is essential for operators to perform a task, while time available is the time period within which the operators should perform a task. The estimation of operator’s required time is necessary in several human factors-related activities for nuclear power plants (NPPs). Operator’s required time has often been estimated by experiments or structured interviews with instructors, operators, and other knowledgeable experts [3], while the time available is usually estimated by specific approaches, e.g., thermo-hydraulic analysis. Digital main control rooms (MCRs) have distinguished design features from conventional, analog control rooms, including advanced alarm systems, graphic information display systems, computerized procedure systems, and soft control. This change may influence operator’s required time. However, the estimation of required time for the digital MCR has not been studied sufficiently in spite of its necessity. In this study, an approach to estimating operator’s required time for the emergency operation at the digital MCR was suggested by using experiments and Monte Carlo simulation. This study defines the task unit, and develops an ARENA simulation model to describe steam generator tube rupture (SGTR) for Monte Carlo simulation. In this study, required time of isolating a damaged steam generator (SG) was estimated as a result of the simulation.