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
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
Meeting Spotlight
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!
Latest Magazine Issues
Apr 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
May 2024
Nuclear Technology
Fusion Science and Technology
Latest News
X-energy receives federal tax credit for TRISO fuel facility
Advanced reactor company X-energy has been awarded $148.5 million in tax credits under the Inflation Reduction Act for construction of its TRISO-X fuel fabrication facility in Oak Ridge, Tenn.
E. Loomis, S. R. Greenfield, S. N. Luo, R. Johnson, T. Shimada, J. Cobble, A. Seifter, D. S. Montgomery
Fusion Science and Technology | Volume 55 | Number 2 | February 2009 | Pages 152-162
Technical Paper | doi.org/10.13182/FST09-A4068
Articles are hosted by Taylor and Francis Online.
Single crystals of beryllium were illuminated with nanosecond X-ray pulses generated from laser irradiated (~1.5 × 1014 W/cm2) gold targets. The characteristic gold M-band centered at 2.5 keV was measured by time-integrated transmission grating spectroscopy and a time-resolved (spectrally integrated) X-ray photodiode through beryllium targets of various thickness. Approximately decaying exponential temperature profiles were predicted to be induced in 100- and 160-m-thick single crystal targets producing nearly instant surface motion as measured by free surface velocity interferometry. This temperature profile gave rise to free surface (opposite to drive laser surface) velocity histories in a c-axis single crystal and a (10[overbar]10) single crystal in which large initial acceleration gave way to lower (ramped) acceleration due to the internal temperature gradient. A smooth rise to the peak velocity was then followed by a sharp release originating from the free surface nearest to the laser drive. Differences between the velocities in each of these regions were found between the two single crystals investigated, which were due to the thermal expansion properties as a function of direction (including plasticity). These results can be used to predict the behavior of preheated polycrystalline targets relevant to instability seeding in inertial confinement fusion ablators.