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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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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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Fusion Science and Technology
February 2024
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Can hydrogen be the transportation fuel in an otherwise nuclear economy?
Let’s face it: The global economy should be powered primarily by nuclear power. And it probably will by the end of this century, with a still-significant assist from renewables and hydro. Once nuclear systems are dominant, the costs come down to where gas is now; and when carbon emissions are reduced to a small portion of their present state, it will become obvious that most other sources are only good in niche settings. I mean, why use small modular reactors to load-follow when they can just produce that power instead of buffering it?
Stephan A. Letts, Jared F. Hund, Justin Sin, Jonathan Monterrosa, Brian Motta, Rod Cahayag, Nicole Petta
Fusion Science and Technology | Volume 73 | Number 2 | March 2018 | Pages 265-272
Technical Paper | doi.org/10.1080/15361055.2017.1387457
Articles are hosted by Taylor and Francis Online.
Four different variations of doped, planar targets were fabricated using multilayer glow discharge polymerization for the foil thickness campaign at the Extended Performance Facility at the University of Rochester. The planar film targets consisted of from one to four layers of CH, CHGe, and CHSi. The composition of Ge and Si was controlled by the flow of dopant gas (either tetramethyl germane or tetramethyl silane) and measured with X-ray florescence. After laser cutting the 200 × 900 × 80-µm film targets out of the larger film, the targets were released from the substrate.
Coating nonuniformity when using an inductively coupled discharge device can be a challenge. We improved the uniformity by rotating the substrate. Film thickness was measured with a chromatic confocal sensor system. Thickness measurements were fit to a Gaussian function, which smoothed the thickness data set and allowed accurate interpolation of thickness measurements.
A challenge for freestanding, planar glow discharge polymer films is intrinsic stress in the coating. Prior to coating the final targets, the coating stress for various deposition parameters was measured. A series of runs with CH, CHGe, and CHSi were coated on thin silicon wafers. The wafers were characterized for bending before and after coating with a stylus profilometer to determine the coating stress using the Stony equation. In general, higher chamber operating pressures resulted in lower stress coatings.