ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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.
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!
Latest Magazine Issues
Jul 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
J. Manuel Perlado, Lorenzo Malerba, Tomás Díaz de la Rubia
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 840-847
Inertial Fusion Technology | doi.org/10.13182/FST98-A11963717
Articles are hosted by Taylor and Francis Online.
An extreme condition in Inertial Fusion Energy (IFE) reactors will be the very high neutron dose rate from each burst of high gain targets. The effect of pulsed damage on the structural materials of the reactor chamber needs to be examined and its actual importance carefully assessed.
A first calculation of neutron spectra and intensities in one burst of directly driven target (pR ≈ 4 g.cm−2, 3 Hz) yields, for a ≈ 500 MJ shot of neutrons, a rate of ≈ 7 × 1020 n.s−1, the total time of deposition on the chamber walls being of ≈ 1 μs. This corresponds to a collisional parameter of 0.1 dpa/burst (in Fe), which gives an average damage rate of ≈ 3.8 dpa/year. The evolution in time of collisional damage is also presented.
Our work focuses on cubic silicon carbide (β-SiC) as a base for the next generation of low-activation materials. The Molecular Dynamics (MD) code MDCASK allows the description of the interaction of high energy recoils with the SiC lattice, by using a modification of the many-body semi-empirical inter-atomic Tersoff potential, merged with a repulsive binary potential obtained from ab initio calculations. A new assessment of previous works is presented. Preliminary values of threshold displacement energies are given and the observation of recombination barriers is reported. As a first step for a future intra- and inter-pulse damage study, by means of Kinetic Monte-Carlo (KMC) diffusion calculations, 3 and 5 keV Si-recoil-induced cascade simulations are analysed, discussing excitation and defects' characteristics in both sub-lattices: differences with respect to earlier works are found. Finally, the simulations of accumulations of up to 25 recoils of 500 eV and 1 keV are examined, in order to get a deeper insight into the damage state produced inside the material by intensive and prolonged irradiation in the absence of self-annealing.