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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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Risk-informed, performance-based design in INL’s MARVEL reactor
The American Nuclear Society’s Risk-informed, Performance-based Principles and Policy Committee (RP3C) has held another presentation in its monthly Community of Practice (CoP) series. Former RP3C chair N. Prasad Kadambi opened the meeting with brief introductory remarks about the RP3C and the need for new approaches to nuclear design that go beyond conventional and deterministic methods. He then welcomed this month’s speaker: Doug Gerstner, a nuclear safety engineer at Idaho National Laboratory, who presented “Application of a Qualitative RIPB Approach for the MARVEL Microreactor at INL.”
Watch the full webinar here.
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.
