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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!
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November 2025
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Latest News
Leading the charge: INL’s role in advancing HALEU production
Idaho National Laboratory is playing a key role in helping the U.S. Department of Energy meet near-term needs by recovering HALEU from federal inventories, providing critical support to help lay the foundation for a future commercial HALEU supply chain. INL also supports coordination of broader DOE efforts, from material recovery at the Savannah River Site in South Carolina to commercial enrichment initiatives.
Sunday, November 9, 2025|1:00–5:00PM EST
Georgetown West
Cost: $49
Attila4MC® - CAD Integrated Calculation Setup, Variance Reduction, and Solution Visualization for MCNP®
Attila4MC provides MCNP users with a GUI based environment to set up, run, and visualize MCNP unstructured mesh solutions from complex CAD geometries.
In this workshop, the new "real-world" CAD workflow in Attila4MC will be demonstrated on a complex shielding model. This workflow enables users to work directly from dirty CAD assemblies with hundreds or thousands of parts, and with "transport insignificant" part interferences, mostly eliminating the need for time consuming CAD cleanup and simplification. An integral part of this workflow is the Cottonwood Variance Reduction module, which performs "single click" CADIS and FW-CADIS variance reduction on complex models through an automatic arbitrary mesh refinement (AMR) deterministic solver.
The new Tamarack module will also be demonstrated. Tamarack provides MCNP constructive surface geometry (CSG) users with an intuitive GUI interface for building, editing, and viewing MCNP input decks. Tamarack can export translated CSG models to CAD using boundary spline surface representations in the STEP (*.stp) format, providing robust and flexible coupling with CAD.
The second half of this workshop is hands-on, where attendees will set up, run, and visualize a deep penetration shielding model starting from CAD. Attendees wishing to run Attila4MC should bring a Windows 10 or 11 laptop with at least 12 GB of RAM. Attendees wishing to also run MCNP must have MCNP 6.2.0 or 6.3.0 installed. Attendees are invited to bring their own CAD models (Parasolid® or ACIS® formats preferable), as the last half hour will include an optional open workshop allowing users to work through their own models with help from Silver Fir Software instructors.
All attendees will receive a 1 month license of Attila4MC following the workshop. For any questions regarding the workshop, contact support@silverfirsoftware.com. For more information on Attila4MC and Tamarack, visit www.silverfirsoftware.com.
