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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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Latest News
Construction begins on Kairos’s fluoride salt–cooled test reactor
Earlier today, on a site in Oak Ridge, Tenn., that was formerly home to the K-33 Gaseous Diffusion Plant, Kairos Power marked the start of construction on its low-power demonstration reactor. Named Hermes, the 35-MWt test reactor claims status as the first Gen IV reactor to be approved for construction by the Nuclear Regulatory Commission and the first non–light water reactor to be permitted in the United States in more than 50 years.
S. Dulla, P. Ravetto
Nuclear Science and Engineering | Volume 155 | Number 3 | March 2007 | Pages 475-488
Technical Paper | Mathematics and Computation, Supercomputing, Reactor Physics and Nuclear and Biological Applications | doi.org/10.13182/NSE07-A2678
Articles are hosted by Taylor and Francis Online.
The paper is devoted to the analysis of the importance of fluid-dynamics phenomena in the neutronic simulation of fluid-fuel multiplying nuclear systems. The motion of the delayed neutron precursors has important effects on both steady-state and transient situations. In this paper the role of the motion is studied by assuming that the coupled neutronic-fluid-dynamics model is simplified, introducing different velocity fields as input data for the delayed neutron precursor balance equations. Significant effects are evidenced for steady-state spatial distributions and integral parameters, such as reactivity and effective delayed neutron fractions. Full time-dependent evaluations are also performed to investigate the response in different system configurations to various transient initiator perturbations.