The MCNP® (Monte Carlo N-Particle®) version 6.2 software is primarily distributed through the Radiation Safety Information Computational Center (RSICC) at Oak Ridge National Laboratory.
As it is a controlled software package used for nuclear research and engineering, it is not available for direct public download from a standard website; you must request it through formal channels. How to Obtain MCNP 6.2 To acquire the software, follow these steps:
Visit RSICC: Go to the RSICC Website to browse their software catalog.
Request a License: Search for CCC-850 (the specific code package for MCNP6.2) and submit a request.
Export Control Verification: Because the software contains sensitive technology, your request will undergo a review for export control compliance.
Delivery: If approved, RSICC typically provides the software on physical media (disks) or through a secure electronic transfer. Documentation and Reports
If you are looking for technical reports or release notes rather than the software itself:
MCNP 6.2 Release Notes: Provides a summary of 39 new features and over 170 bug fixes.
MCNP 6.2 User’s Manual: The official LA-UR-17-29981 report details the math, geometry, and input structures for version 6.2.
Installation Guide: A Tutorial for Windows describes copying disk files to a directory (e.g., C:\mcnp62) and running the install_620.bat script. Key Technical Improvements in 6.2 Compared to earlier versions, 6.2 introduced:
Enhanced Physics: Better delayed-particle production and sampling algorithms.
Mesh Tallies: Significant improvements to the fmesh tally, allowing material-dependent calculations across multiple materials.
Cosmic Ray Sources: Implementation of galactic cosmic-ray (GCR) source options for background particle simulations. User's Manual Code Version 6.2 - MCNP
To download , you must request the software through the Radiation Safety Information Computational Center (RSICC) mcnp 62 download top
at Oak Ridge National Laboratory, as it is export-controlled and not available for direct public download.
Once you have the software, you can follow the steps below to produce a technical paper or simulation report based on your MCNP 6.2 results. Obtain the Software Official Request : Submit a request via the RSICC software catalog
. You will need to provide justification for your use case and undergo a background check due to the nature of the nuclear transport code. Documentation : Access the Official MCNP6.2 User Manual (LA-UR-17-29981) for detailed setup and theory. Los Alamos National Laboratory (.gov) Produce a Technical Paper (Structure)
If you are writing a paper based on your MCNP simulations, use this standard academic structure:
: Summarize the problem (e.g., radiation shielding, criticality safety), the MCNP version used (6.2), and the key findings. Introduction
: Define the scope of your nuclear transport simulation. State why MCNP was chosen over other codes. Methodology (Modeling)
: Describe your input file cells and surfaces (e.g., simplified fuel rods or complex shielding structures).
: List the isotopes and cross-section libraries (e.g., ENDF/B-VII.1 or VIII.0). Source Term
: Define your particle source (Neutron, Photon, etc.) using the Results & Discussion Present your for energy deposition). Discuss the Variance Reduction
techniques used to ensure statistical convergence (Relative Error < 0.10). Conclusion
: Restate the significance of the results for your specific application. References
: Properly attribute the code. For MCNP 6.2, cite the Los Alamos National Laboratory technical reports. American Nuclear Society -- ANS Paper & Report Resources Technical Reports : Reference the MCNP Release Overview
(LA-UR-18-20808) for specific version 6.2 features like Unstructured Mesh (UM) support. ResearchGate examples The MCNP® (Monte Carlo N-Particle®) version 6
for formatting your simulation data into paper-ready figures and tables. Los Alamos National Laboratory (.gov) User's Manual Code Version 6.2 - MCNP
Direct downloads of MCNP 6.2 are not available online because the software is strictly export-controlled by the U.S. Department of Energy. You must request and license it through authorized distribution centers. 🛑 How to Legally Obtain MCNP 6.2
Because MCNP (Monte Carlo N-Particle) is used for nuclear modeling and radiation transport, it cannot be downloaded from standard public repositories or file-sharing websites.
U.S. and International Requests: You must create an account and submit a formal request through the Radiation Safety Information Computational Center (RSICC) at Oak Ridge National Laboratory.
European Requests: If you are based in a member country, you can request it through the OECD Nuclear Energy Agency Data Bank (NEA). 📖 Official Reports and Documentation
While you cannot download the code itself freely, the technical reports detailing the release, installation, and manual for MCNP 6.2 are completely public:
Release Features: You can read the official MCNP Version 6.2 User's Manual published by Los Alamos National Laboratory (LANL), which highlights the 31 new features included in the build.
Installation Details: Review the MCNP Version 6.2 Release Technical Report for step-by-step instructions on the script-based installation process and system requirements. User's Manual Code Version 6.2 - MCNP
Obtaining MCNP 6.2 (Monte Carlo N-Particle) requires following formal legal and regulatory procedures, as it is export-controlled software developed by Los Alamos National Laboratory (LANL)
. It is not available for direct public download from a "top" list or standard repository. Los Alamos National Laboratory (.gov) How to Obtain MCNP 6.2
To legally acquire the software, you must request it through authorized distribution centers: RSICC (Radiation Safety Information Computational Center): Most users worldwide obtain MCNP from the RSICC website
at Oak Ridge National Laboratory. You must register for an account and submit a formal request. NEA Data Bank:
Users in OECD/NEA member countries can often request the package through the NEA Data Bank Important Requirements Export Control: No Public "Top" Downloads: There is no legal
Distribution is restricted by U.S. export control regulations. You will likely need to provide your organizational affiliation and a justification for use. Licensing Fees:
While the code itself is government-developed, there are often administrative fees associated with the distribution and licensing process. Documentation: The package includes the MCNP 6.2 User's Manual
(LA-UR-17-29981), which is essential for proper installation and use. Los Alamos National Laboratory (.gov) Typical Installation Steps
Once you receive the official media (usually a DVD or secure download link): Copy Files: Transfer the contents to a local directory, such as on Windows. Run Installer: Execute the installation script (e.g., install_620.bat ) from a command prompt. Verification:
Run the provided test suites to ensure the code was compiled and installed correctly. or a guide on writing your first MCNP input file User's Manual Code Version 6.2 - MCNP
MCNP 6.2 is not public software. It is export-controlled and proprietary software owned by the U.S. Department of Energy (DOE).
mcnp6 i=test.inp o=test.out runtpe=test.r
Once you successfully complete the RSICC or OECD-NEA process, here is what your "MCNP 62 download" will include:
Installation Overview (for Linux):
tar -xzf mcnp6.2.tar.gz
cd MCNP6_2_Source
export MCNP6_2=/path/to/install
make
./mcnp6 i=test.inp o=test.out
Software Versions: Ensure you download software from reputable sources to avoid malware. Always verify the integrity of the downloaded files using checksums or other methods provided by the software vendor.
Data Sensitivity: Be aware of the sensitivity of the data and models you develop, especially if they pertain to nuclear materials or applications.
To refine your search, use the phrase: "MCNP 6.2 legitimate download RSICC" or "MCNP 62 academic access OECD." These will surface the correct government/nuclear agency portals rather than misleading download aggregators.
A: Absolutely not. The license is non-transferable. Each user must register individually with RSICC or OECD-NEA.