14 Oct 2021 // New Release of Attila/Attila4MC 10.2.0
Silver Fir Software is pleased to announce the release of Attila/Attila4MC Version 10.2.0, which licensed users can download from www.attilasupport.com.
Version 10.2.0 contains a number of features to significantly improve user productivity for both Attila and MCNP® calculations, some of which include:
· Integration of the PNNL material database for radiation transport modeling (PNNL-15870r1) into the Attila/Attila4MC graphical user interface;
· New adaptive spatial discretization method (LDAS) for improved weight window variance reduction efficiency using the CADIS and FW-CADIS methods;
· 10-20% faster deterministic calculation efficiency;
· Improved mesh generation robustness, including CAD interference tolerant modular mesh generation for MCNP®;
· New FENDL-3.1d (n-γ) cross section library, with an inclusive list of isotopes, supporting both Attila and MCNP®;
· Expanded command-line mesh generation/translation capabilities;
· Ability to join results from independent calculations for Tecplot® solution visualization;
· New videos training content in support of Version 10.2 including: optimizing of CADIS and FW-CADIS, walking over small CAD features in mesh generation, solution merging, and basic tutorials, etc.
For more information, please contact us at support@silverfirsoftware.com
24 Aug 2021 // Attila4MC High Energy Physics Example – Proton Therapy Center.
This example assessed both neutron and secondary gamma dose from a 250 MeV proton source.
The facility CAD model was imported directly into the Attila4MC GUI, allowing for unstructured mesh generation for both deterministic variance reduction (VR) and radiation transport.
HILO2K cross sections were used for the deterministic VR, allowing for neutron energies up to 2 GeV.
For comparison cases were run in analog MCNP, and with our deterministic VR solver LDAS with FW-CADIS to achieve uniform uncertainty throughout the facility.
All models were run for 1E+08 particles, variance reduction run times were 30 minutes and 13 minutes for neutrons and secondary gammas respectively.
If you would like to hear more about how our products can improve your efficiency with MCNP, please contact us on LinkedIn: https://www.linkedin.com/company/silver-fir-software
or via our website: https://lnkd.in/dAEk9dGw
3 Aug 2021 // Silver Fir Software Inc. and Kinectrics Inc. have signed a cooperation agreement that will establish Kinectrics as a preferred training partner and user of the Attila code suite for the North American nuclear industry.
“Kinectrics is excited to work with Silver Fir Software to advance the use of Attila in the North American nuclear industry”, said David Harris, President and CEO of Kinectrics.
Read more about this exciting new initiative here: https://lnkd.in/eMVGFWw
20 July 2021 // Silver Fir Software are delighted to announce we have been awarded a Phase I Small Business Innovation Research (SBIR) Grant from the U.S. Department of Energy Fusion Energy Sciences Program.
The Grant, titled “Design Focused Product to Streamline Fusion Neutronics Calculation Workflow” will expand the capabilities of Attila4MC in support of Fusion Neutronics applications. As part of this project, Silver Fir Software will further simplify the Attila4MC process to generate an MCNP® computational model from CAD assemblies, with an emphasis on eliminating the need for users to remove insignificant part overlaps, which are common in production CAD assemblies.
A secondary emphasis of the project is to expand Attila4MC features related to activation source generation on the tetrahedral mesh. The Massachusetts Institute of Technology Plasma Science and Fusion Center will be participating as a subcontractor on this grant, and will be testing developed features on relevant SPARC tokamak models. Although the initial emphasis is on MCNP integration, the capabilities developed under this project will later be extended to support the OpenMC Monte Carlo code.
29 June 2021 // Introducing LDAS – Our new deterministic variance reduction solver, which generates energy based weight windows for MCNP. The example below produces a deterministic solution for a 1E+15 reduction in the flux field in under two minutes. Providing a quick solution to your variance reduction needs. If you want to hear more about how LDAS could improve your MCNP productivity, or any of our other products, please get in touch with one of our support team.
11 May 2021 // We at Silver Fir Software are delighted to announce our expansion with the opening of a UK & Europe branch, further strengthening our support and services offerings to our clients. This branch will be headed up by Andrew Cooper, who joins us from Atkins, and will be based in the UK. Andrew brings with him a wealth of experience in the nuclear consulting sector with 15 years specializing in radiation transport analysis and business development for a variety of clients in the UK and abroad. As Director of the UK & Europe branch, Andrew will be responsible for Business Development and Technical Support, where his knowledge of the nuclear sector and experience with industry standard analysis codes such as MCNP and Attila will be a valuable asset to the Silver Fir Software business.
11 Feb 2021 // Check out the recently updated Publications section of our website! We’ve collected an extensive list of third-party technical reports and peer-reviewed publications, including radiation transport on unstructured mesh specific publications. We will be constantly updating this page; let us know if we’ve missed anything!
14 Dec 2020 // We are pleased to announce that we released Attila 10.2.0-beta3 on November 25th, 2020. Attila 10.2.0-beta3 introduces the new Linear Discontinuous Adaptive to Step (LDAS*) spatial discretization, applicable for CADIS and FW-CADIS calculations with Attila4MC. LDAS is a new proprietary adaptive spatial discretization scheme that eliminates the possibility of negative flux solutions, other than those resulting from negative scattering sources, while retaining high accuracy through thick shields. LDAS can produce an accurate and smooth weight windows file for MCNP®, improving solution convergence rates. Also included in 10.2.0-beta3 is the Reprise License Manager, which provides a server based floating license capability. Attila 10.2 is scheduled for release early 2021. *Patent pending
15 Aug 2020 // Welcome to our new website!
04 May 2020 // We are currently testing Attila 10.2.0-beta2, released on May 4th, 2020. This latest beta includes an updated mesher to improve robustness and parasolid compatibility.
07 Jan 2020 // An “adjoint grid flux correction” capability was added into Attila 10.2.0-beta1 to smooth weight windows for problems with significant ray effects, substantially improving performance for CADIS and FW-CADIS calculations.