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Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
Latest News
NRC engineers share their expertise at the University of Puerto Rico
Robert Roche-Rivera and Marcos Rolón-Acevedo are licensed professional engineers who work at the U.S. Nuclear Regulatory Commission. They are also alumni of the University of Puerto Rico–Mayagüez (UPRM) and have been sharing their knowledge and experience with students at their alma mater since last year, serving as adjunct professors in the university’s Department of Mechanical Engineering. During the 2023–2024 school year, they each taught two courses: Fundamentals of Nuclear Science and Engineering, and Nuclear Power Plant Engineering.
L. M. Manocha, Milan M. Vyas, S. Manocha, P. M. Raole
Fusion Science and Technology | Volume 65 | Number 2 | March-April 2014 | Pages 308-318
Technical Paper | doi.org/10.13182/FST13-674
Articles are hosted by Taylor and Francis Online.
Carbon- and silicon carbide (SiC)-based materials, especially in the form of composites, have attracted more attention from reactor technologists than have other ceramics because they better fulfill the prime requirements of reactor materials, such as high-temperature stability and low susceptibility to irradiation and nonbrittle fracture. These composites are fabricated through different routes and may vary in their properties. Therefore, sufficient data need to be generated on the microstructure and mechanical properties of these composites. In the studies reported here, carbon- and SiC-based fibrous ceramic composites were prepared using a liquid-infiltration sol-gel technique with carbon fibers as reinforcement and hybrid sol and pitch as matrix precursors. To some compositions, SiC nanoparticles were added. The composites were heated to 1000°C and 1500°C. The sol-gel route results in an amorphous mixed oxycarbide, silica, and carbon matrix, which on heat treatment at 1500°C is converted to a semicrystalline SiC matrix composite. Scanning electron microscope examination of carbon fiber/carbon and carbon fiber/SiC composites showed good wetting of fibers by matrix resin, forming good bonding at the interface. The carbon fiber/SiC composites with SiC nanoparticles as additional reinforcement showed higher density as well as a 34% increase in flexural strength compared with those without nanoparticles. The addition of just 1 wt% of SiC nanoparticles decreased oxidation by 4 wt%.