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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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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
College students help develop waste-measuring device at Hanford
A partnership between Washington River Protection Solutions (WRPS) and Washington State University has resulted in the development of a device to measure radioactive and chemical tank waste at the Hanford Site. WRPS is the contractor at Hanford for the Department of Energy’s Office of Environmental Management.
Kazuaki Kito, Rui Hu, Mujid S. Kazimi
Nuclear Technology | Volume 171 | Number 1 | July 2010 | Pages 1-13
Technical Paper | Reactor Safety | doi.org/10.13182/NT10-A10768
Articles are hosted by Taylor and Francis Online.
The Large Assembly with Small Pins (LASP) concept is an evolutionary fuel design proposed to enable a higher power density in boiling water reactors while maintaining the same operating conditions, such as power-to-flow ratio, core inlet conditions, and fuel-to-moderator ratio. It is based on replacing four traditional assemblies and the large water gap regions between them with a single large assembly having a 22 × 22 square fuel pin lattice. Twenty-five water rods within the assembly help maintain neutron moderation and accommodate as many finger-type control rods. It was previously shown that the LASP core allows operation with 20% higher power density than the core with traditional 9 × 9 fuel assemblies. However, the void reactivity coefficient of the LASP core is 25% more negative. In this study, the stability performance of the LASP core has been evaluated.The characteristics of density wave oscillations in the LASP core and their sensitivity to the operating parameters have been investigated. Although the perturbation decay ratios for the LASP core were found to be greater than those of the reference core, the stability criteria are sufficiently satisfied. Sensitivity studies were performed on the effects of design and operating parameters. It can be concluded that the LASP and the reference core have similar sensitivity to operating parameters. Furthermore, the calculated decay ratios were much smaller than the stability criterion for all the considered parameter ranges.