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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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Latest News
Why should safeguards by design be a global effort?
Jeremy Whitlock
I can’t think of a more exciting time to be working in nuclear, with the diversity of advanced reactor development and increasing global support for nuclear in sustainable energy planning. But we can’t lose sight of the need to plan for efficient international safeguards at the same time.
Global nuclear deployment has been underpinned since 1970 by the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), making it a key customer requirement for governments to demonstrate unequivocally that the technology is not being misused for weapons development.
The International Atomic Energy Agency (IAEA) has helped verify this commitment for more than 50 years, but it has never safeguarded many of the advanced reactors (and related fuel cycle processes) being developed today.
C. M. Greenfield
Fusion Science and Technology | Volume 48 | Number 2 | October 2005 | Pages 1178-1198
Technical Paper | DIII-D Tokamak - Advanced Tokamak Scenarios | doi.org/10.13182/FST05-A1070
Articles are hosted by Taylor and Francis Online.
Research in DIII-D places a major emphasis on developing a scientific basis for high-performance steady-state operation for use in burning plasma tokamaks. This work has resulted in a long history of studies of high-performance regimes. Several of these regimes are described. H-mode, the first high-performance regime, is characterized by the formation of a transport barrier in the boundary region. The VH- and QH-modes, both variations of the H-mode, were both first identified through pioneering work on DIII-D. Although internal transport barriers (ITBs) had been observed previously, advanced diagnostics implemented on DIII-D and elsewhere allowed the physics of these phenomena to be elucidated. This work led to the combination of a VH-mode edge and an ITB core, which exhibits the highest fusion performance obtained in DIII-D. ITBs can also be combined with the QH-mode edge to produce the quiescent double barrier regime, characterized by nearly stationary high-performance plasmas. Like the ITB, high-li plasmas also exhibit performance improvements deeper in the core, in this case due to increased poloidal magnetic field. Although many of these regimes exhibit high-fusion performance only transiently, they provide important platforms for developing an understanding of the physics of transport and magnetohydrodynamic stability and provide the basis for extending to longer duration and evaluating compatibility with steady state.