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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.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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Glass strategy: Hanford’s enhanced waste glass program
The mission of the Department of Energy’s Office of River Protection (ORP) is to complete the safe cleanup of waste resulting from decades of nuclear weapons development. One of the most technologically challenging responsibilities is the safe disposition of approximately 56 million gallons of radioactive waste historically stored in 177 tanks at the Hanford Site in Washington state.
ORP has a clear incentive to reduce the overall mission duration and cost. One pathway is to develop and deploy innovative technical solutions that can advance baseline flow sheets toward higher efficiency operations while reducing identified risks without compromising safety. Vitrification is the baseline process that will convert both high-level and low-level radioactive waste at Hanford into a stable glass waste form for long-term storage and disposal.
Although vitrification is a mature technology, there are key areas where technology can further reduce operational risks, advance baseline processes to maximize waste throughput, and provide the underpinning to enhance operational flexibility; all steps in reducing mission duration and cost.
A. D. Caldeira, A. F. Dias, R. D. M. Garcia
Nuclear Science and Engineering | Volume 130 | Number 1 | September 1998 | Pages 60-69
Technical Paper | doi.org/10.13182/NSE98-A1989
Articles are hosted by Taylor and Francis Online.
The PN method is used to solve the multigroup slowing-down problem in plane geometry. A scalar (group-by-group) PN solution that is less limited by computational resources than previously reported vector solutions is developed. The solution is expressed, for a given group, as a combination of homogeneous and particular solutions that satisfies the first N + 1 moments of the corresponding transport equation. An interesting feature of the proposed approach is that the particular PN solution can be written in a form analogous to that of the homogeneous solution, except that a newly introduced class of generalized Chandrasekhar polynomials takes the place of the usual Chandrasekhar polynomials. Numerical results are given for two test problems and compared, for various orders of the approximation, with reference results available in the literature.