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Division Spotlight
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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
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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.”
J. O. C. Imrie, D. Witow (Hatch), A. Lee, A. Živkovi? (NWMO)
Proceedings | 16th International High-Level Radioactive Waste Management Conference (IHLRWM 2017) | Charlotte, NC, April 9-13, 2017 | Pages 437-445
The management of nuclear waste products in Canada is undertaken by the Nuclear Waste Management Organization (NWMO). The Nuclear Waste Management Organization (NWMO) is implementing Adaptive Phased Management (APM), Canada’s plan for the long-term management of used nuclear fuel. The APM approach encompasses centralized containment and isolation of the used fuel in a Deep Geological Repository (DGR) in a suitable rock formation, such as crystalline rock or sedimentary rock, in an informed and willing host community. A conceptual adaptive layout design that can adapt to the structural anisotropy of the rock mass as expected in a hypothetical crystalline geosphere is being considered. This layout will incorporate significant flexibility in addressing geoscientific, safety and engineering aspects as details become available during progressive site specific study stages and construction.
This paper presents the conceptual design requirements, preliminary engineering analyses, and results for this adaptive layout. The overall layout configuration considers the functionality of the:
• Ventilation strategy.
• Establishment of flow-through ventilation.
• Traffic flow management.
• Underground central services area (CSA).
• Completion of the demonstration rooms during initial construction.
• Completion of the first panel of the placement rooms prior to operations.
• Worker safety and preliminary thoughts on emergency responsiveness.
The results of this study conclude that there is significant flexibility of the layout to adapt to the geosphere as it becomes progressively defined; the ventilation system and traffic flow can be configured for different scenarios through the DGR operations; and, potential worker exposure for defined emergency events is minimized with this adaptive layout.