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
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
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
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.
Harold E. Clark, Grover Tuck
Nuclear Technology | Volume 9 | Number 6 | December 1970 | Pages 814-820
Chemical Processing | doi.org/10.13182/NT70-A28713
Articles are hosted by Taylor and Francis Online.
An empirical formula has been developed for determining the individual diameter of essentially unreflected cylinders in a critical planar array. The formula is. The independent variables are N, the number of cylinders in the array; S, the edge-to-edge spacing between adjacent cylinders; H, the solution height in the array; C, the concentration of the solution [U ∼93 wt% 235U]; G, the geometry factor determined by the shape of the array; and ki (i = 1, 2, ... , 8), the constants determined by the type of solution, either uranyl nitrate or uranyl fluoride. These independent variables, the formula ranges, and approximations are discussed. The critical cylinder diameter, calculated by this formula, is within ±8% of the experimentally measured diameter for 112 experimental data points. Therefore, the formula can be used as a guideline for nuclear criticality safety.