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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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Jul 2024
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Nuclear Science and Engineering
August 2024
Nuclear Technology
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 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.”
P. Zuidema, S. Vomvoris (Nagra)
Proceedings | 16th International High-Level Radioactive Waste Management Conference (IHLRWM 2017) | Charlotte, NC, April 9-13, 2017 | Pages 632-638
The Swiss site selection process for geological repositories is a stepwise approach defined by the ‘Sectoral Plan for Deep Geological Repositories’. The narrowing down process begins with the selection of broad geological siting regions (Stage 1). The evaluation of the various potential regions is performed on the basis of safety and engineering feasibility criteria explicitly defined in the Sectoral Plan. Stage 1 was completed in 2011 with the approval by the Federal Government of the three (for the HLW repository) and six (for the L/ILW repository) potential siting regions proposed by Nagra.
The narrowing-down process continued with Stage 2, the focus of which is the selection of at least two potential siting regions for each type of repository. Criteria addressing spatial planning and environmental aspects were also considered in this Stage for the siting of the surface facilities. Nagra's proposals were published in early 2015 and they are currently under review. It is expected that the authorities will conclude their review early 2017 and the Federal Government will issue its decision after broad consultation in 2018.
Stage 3 has as a goal the selection of one site for each type of repository. For each repository a general licence application will be submitted which must be approved by the government, ratified by parliament, and is subject to a facultative national referendum.
An overview of the methodology developed for Stage 2, its implementation and the selection of the proposed sites is presented in this paper.