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.
Explore membership for yourself or for your organization.
Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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
Sep 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
October 2025
Nuclear Technology
September 2025
Fusion Science and Technology
Latest News
PR: American Nuclear Society welcomes Senate confirmation of Ted Garrish as the DOE’s nuclear energy secretary
Washington, D.C. — The American Nuclear Society (ANS) applauds the U.S. Senate's confirmation of Theodore “Ted” Garrish as Assistant Secretary for Nuclear Energy at the U.S. Department of Energy (DOE).
“On behalf of over 11,000 professionals in the fields of nuclear science and technology, the American Nuclear Society congratulates Mr. Garrish on being confirmed by the Senate to once again lead the DOE Office of Nuclear Energy,” said ANS President H.M. "Hash" Hashemian.
Sunday, June 12, 2022|8:00AM–12:00PM PDT
Avila A
Requirements for Attendees: General knowledge of MCNP6
Summary Paragraph: This tutorial focuses on using MCNP6.3 to perform criticality calculations for criticality safety and reactor physics applications and promoting use of MCNP version 6.3 at DOE sites. Lectures provide an overview of Monte Carlo simulation methods and highlight state-of-the-art in criticality simulations, eigenvalue calculations, convergence analysis and bias in k-effective. New features and physics improvements in MCNP6.3 will be covered including adaptive meshing, fission-matrix, accelerated fission convergence of neutron distribution, and new statistical tests for convergence. Sensitivity and uncertainty analysis using Whisper-1.1 will be discussed and calculation examples demonstrated.