TART2022 Monte Carlo Code NOW FREE EVERYWHERE Locally within Lawrence Livermore National Laboratory (LLNL) FREE contact Dave Heinrichs: E.mail: Heinrichs1@llnl.gov Tele: 925-424-5679

FREE Nationally for use in Criticality Safety Applications contact RSICC, Oak Ridge: https://rsicc.ornl.gov/CustomerService.aspx FREE Internationally to Member States Internationally contact NEA/DB, Paris http://www.oecd-nea.org/dbprog/neadbmembers.htm

The TART2022 Code Update Includes Executables for Windows, and Source Code to Create Executables on any other type of Computer, particularly MAC and LINUX MakeFiles are provided.   What TART Does and How it Works are extensively documented elsewhere in hundreds of online reports (for example, see, the below references)

The user's manual remains, "TART2005: A Coupled Neutron-Photon 3-D, Combinatorial Geometry, Time Dependent Monte Carlo Transport Code," by Dermott E. Cullen, University of California, Lawrence Livermore National Laboratory, P.O. Box 808, L-59, Livermore, CA 94550, UCRL-SM-218009, November 22, 2005

References An Overview of TART2022 Now Available On-line at the LLNL Library "TART 2022: An Overview of A Coupled Neutron Photon, 3-D, Combinatorial Geometry, Time Dependent Monte Carlo Transport Code", LLNL-SM-835527, May 2022 by Dermott E. Cullen, LLNL, Retired

Acknowledgement The last public release of TART was TART2016. Since that time there has been no support or development work done on TART at LLNL. However, outside of LLNL TART users have been very active in using and improving TART for their own applications. As a courtesy these users sent me a copy of the current TART, which I named TART 2022. Through their kindness I have been able to make TART2022 available to TART users inside and outside of LLNL, at essentially no cost to LLNL or any other organization. To me this is an excellent example of cooperation within the International community.   In this regard I must acknowledge in particular, the major contributions of Fabrice Pelestor (DGA/Technique Naval, Toulon, France); he contributed many improvements to TART, particularly he contributed the 64 bit and multi- processing version, to greatly modernize the code and allow it to be efficiently used with today's computers. The code we have today, TART2022, could not have been produced without his contributions.