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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.
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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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Fusion Science and Technology
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.
J. S. Jaquez, E. L. Alfonso, A. Nikroo
Fusion Science and Technology | Volume 49 | Number 4 | May 2006 | Pages 768-772
Technical Paper | Target Fabrication | doi.org/10.13182/FST06-A1199
Articles are hosted by Taylor and Francis Online.
We have successfully sputter deposited 2 m thick layers of SiO2 on CH mandrels ~ 2 mm in diameter to act as a permeation barrier for deuterium. Such targets can be used for experiments at Sandia's Z facility as well as at the National Ignition Facility (NIF). This permeation barrier has been shown to have a half-life (1/2) of ~2-4 weeks for a thickness of ~ 1.5 m. The sputter coating conditions have been successfully optimized to produce smooth uniform SiO2 coatings with enough integrity to allow routine handling as well as filling to the required pressures (20 atm). The key coating conditions investigated were the agitation mechanism and the coating pressure. We found that an agitation mechanism using gentle rolling produced coatings with a half-life of greater than three weeks, whereas a more vigorous bouncing agitation yielded half-lives of only a few days. Coating pressures of 2, 5, and 10 mTorr were studied and it was found that coatings at 5 mTorr produced coatings free of cracking. Since the sputtering is performed in a background atmosphere of argon, the sputtered SiO2 layer was found to contain trace amounts of argon as measured by x-ray fluorescence (XRF) measurements. Our work has yielded a controllable uniform alternative permeation barrier to the traditionally used poly(vinylalcohol) (PVA).