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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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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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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BWXT will scout potential TRISO fuel production sites in Wyoming
BWX Technologies Inc. announced today that its Advanced Technologies subsidiary has signed a cooperation agreement with the state of Wyoming to evaluate locations and requirements for siting a potential new TRISO nuclear fuel fabrication facility in the state.
O. M. Stansfield
Nuclear Technology | Volume 6 | Number 4 | April 1969 | Pages 313-320
Technical Papers and Note | doi.org/10.13182/NT69-A28339
Articles are hosted by Taylor and Francis Online.
Four high-strength, fine-grain commercial-graphite friction couples were rubbed with oscillating motion for a distance of 6250 or 12 000 cm in dry helium (∼ 2 ppm H2O) at 25, 400, and 800°C. Loads of 2 or 8 kg were used to produce nominal contact pressures of between 4.2 and 35.0 kg/cm2. The friction coefficient for all the materials was a complex function of sliding distance, temperature, and degree of outgassing prior to sliding. When the graphites were outgassed at 400°C, the friction during initial sliding (25 to 250 cm) at 25, 400, and 800°C first increased by factors of 1.1 to 4 and then decreased rapidly to values similar to that at the onset of sliding. The maximum friction transients of outgassed graphite were observed at 400°C, and minimums were observed at 800°C. The transient was not produced when outgassing and sliding were conducted at 25°C. The friction coefficient for most of the sliding distance varied between 0.35 and 0.40 at 25 and 400°C, while at 800°C the typical coefficient was 0.30. Wear properties of the graphites appeared similar. During sliding under equal loads, the wear at 25°C was about ten times greater than at 400 or 800°C. The wear rate apparently decreased rapidly with sliding distance. Wear factors ranging from 3 × 10−5 to 5 × 10−4 cm3/kg load were measured at 400 and 800°C for both 6250 and 12 500 cm sliding distance.