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
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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
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Latest News
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.
Richard A. Wolfe
Nuclear Technology | Volume 9 | Number 2 | August 1970 | Pages 218-228
Reactor Siting | Symposium on Theoretical Models for Predicting In-Reactor Performance of Fuel and Cladding Material | doi.org/10.13182/NT70-A28810
Articles are hosted by Taylor and Francis Online.
Calculations show that a 10% isotopic abundance of 238 Pu in a bare spherical 239 Pu-H2O system increases the minimum critical mass by ∼48%, thereafter the increase continues exponentially. These results, in addition to several subcritical neutron multiplication experiments with 238 Pu in both solution and dioxide form, confirm that 238 Pu behaves as a neutron poison in a well-moderated medium. Neutron multiplication experiments were conducted with four SNAP-19B (IRHS) heat sources with ∼1 kg 238 Pu per source. The results indicated that a neutron multiplication <1.2 existed when the heat sources were assembled in different array configurations. The criticality unit value for 238 Pu in either solution or dioxide form has been conservatively established at 2.0 kg. Thermocouples installed on process vessels have proven to be a new criticality control technique for determining gradual 238 Pu sludge buildup. Heterogeneous water-filled storage vaults provide the safest method for storing large quantities of PuO2 containing at least 76% 238Pu.