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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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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.
Biplab Ghosh, S. B. Degweker
Nuclear Science and Engineering | Volume 147 | Number 2 | June 2004 | Pages 167-175
Technical Paper | doi.org/10.13182/NSE04-A2426
Articles are hosted by Taylor and Francis Online.
Measurements of neutron flux in the laboratory are known to show significant departure from the inverse square law due to reflection of neutrons from the walls, floor, and ceiling of the laboratory. A simple model is developed to describe the flux distribution due to a point isotropic source in such a situation by treating the room as a cavity with reflecting walls. The model is exactly solvable for a spherical cavity and leads to a simple formula for the flux distribution. The formula thus derived shows good agreement with Monte Carlo computations. Small deviations of the formula from the computed results, particularly for thin walls, are explained as being caused by the anisotropy of the incoming angular distribution of the reflected flux.
