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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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Fusion Science and Technology
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 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. 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.”
Myoung-Suk Kang, Gyunyoung Heo, Young-Seok Lee, Hyuck Jong Kim
Fusion Science and Technology | Volume 60 | Number 1 | July 2011 | Pages 1-8
doi.org/10.13182/FST11-A12397
Articles are hosted by Taylor and Francis Online.
This paper surveyed the safety issues and the related engineered safety features for designing Korean demonstration fusion power plant. Since the design process was staying at a conceptual stage and regulatory requirements were not fully matured, it was significant to investigate the broad options and select feasible candidates. In order to straddle system's performance and risk, the study followed the principles of Axiomatic Design (AD) and Fault Tree Analysis (FTA). The interplay of AD and FTA facilitates developing the design of fusion power plants for enhancing performance (power generation) and reducing risk (radiation hazard). While AD is a synthesis process in the success domain to compromise functional requirements and design options in terms of a functional hierarchy tree, FTA considers a safety analysis process in the failure domain. The functional hierarchy tree, which is also named as a functional requirement and design parameter tree, showed the entire fusion power plant with multiple design candidates in a hierarchic manner. This tree can be transformed into a fault tree. While developing the fault tree, the list of DBAs which are the failure modes for the leaves of the fault tree could be recognized, and the associated engineered safety features were proposed depending on the consequences of a DBA. As a demonstration for analyzing a DBA, the mass and energy release calculation for in-vessel loss of coolant accident was described.