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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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
Virginia utility considers SMRs
Dominion Energy Virginia has issued a request for proposals from leading nuclear companies to study the feasibility of putting a small modular reactor at its North Anna nuclear power plant.
While the utility says it is not a commitment to build an SMR at the site, the RFP is “an important first step in evaluating the technology and the North Anna site to support Dominion Energy customers’ future energy needs consistent with the company’s most recent Integrated Resource Plan.”
Brent J. Lewis, Fernando C. Iglesias, C. E. Laurence Hunt, David S. Cox
Nuclear Technology | Volume 99 | Number 3 | September 1992 | Pages 330-342
Technical Paper | Nuclear Reactor Safety | doi.org/10.13182/NT92-A34717
Articles are hosted by Taylor and Francis Online.
An analytical model has been developed to describe the kinetic release behavior of the volatile fission product species (e.g., cesium) from uranium dioxide fuel. This treatment is based on the analysis of a series of out-of-pile annealing tests with bare fuel specimens, at temperatures of 1200 to 1800°C, performed under a wide range of atmospheric conditions that are characteristic of a severe reactor accident. The physically based model accounts for the changing fuel stoichiometry. A more general framework is therefore provided to detail the release kinetics in reducing and oxidizing environments. Solid-state diffusion in the fuel matrix is shown to be the rate-controlling mechanism of release in atmospheres of either hydrogen or argon. On the other hand, in addition to the slower diffusion component, it is demonstrated that a “burst-release” process also occurs in a steam environment, in accordance with first-order rate theory, where fission products are rapidly released at small values of the stoichiometry deviation.