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 Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
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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Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
The fire that powers the universe: Harnessing inertial fusion energy
It was a laser shot for the ages. By achieving fusion ignition on December 5, 2022, Lawrence Livermore National Laboratory proved that recreating the “fire” that fuels the sun and the stars inside a laboratory on Earth was indeed scientifically possible.
John M. Ryskamp, Robert A. Anderl, B. L. Broadhead, W. E. Ford III, J. L. Lucius, J. H. Marable, J. J. Wagschal
Nuclear Technology | Volume 57 | Number 1 | April 1982 | Pages 20-35
Technical Paper | Fission Reactor | doi.org/10.13182/NT82-A16183
Articles are hosted by Taylor and Francis Online.
The Coupled Fast Reactivity Measurements Facility (CFRMF) is a zoned-core critical assembly with a fast neutron spectrum zone in the center of an enriched 235U, water-moderated thermal driver. The central neutron field is a Cross-Section Evaluation Working Group benchmark for data testing of fission product, actinide, and dosimetry cross sections important to fast reactor technology. The AMPX and FORSS code systems were used to determine a covariance matrix for the CFRMF central neutron spectrum. The covariance matrix accounts for neutron cross-section and fission spectrum uncertainties and correlations. Uncertainties in the 238U inelastic-scattering cross sections and in the 235U fission spectrum were found to contribute most to the standard deviations in the central flux spectrum. The flux-spectrum covariance matrix contains strong correlations. This strongly motivates including the off-diagonal elements in data testing and cross-section adjustment applications. The flux spectrum covariance matrix was applied in this work for integral data testing for dosimeter cross sections.