You will need to provide your professional or academic credentials.
RSICC, managed by Oak Ridge National Laboratory (ORNL), is the primary distributor of MCNP packages for the U.S. Department of Energy.
For users outside the United States, the NEA Data Bank often handles the distribution of MCNP to member countries.
For any questions, the MCNP team recommends visiting the official LANL MCNP website for support, documentation, and a list of frequently asked questions.
For researchers and organizations outside the United States (in member countries), the OECD NEA Data Bank acts as a authorized distributor for specific versions of MCNP code packages. Similar to RSICC, you must register, outline your research objectives, and obtain official clearance. Option 3: Institutional Licensing mcnp62 download free
Unofficial downloads are frequently bundled with malware, ransomware, or spyware.
It is export-controlled (EAR99 or higher), meaning it cannot be freely distributed on public file-sharing websites or torrents. How to Get MCNP Legally for "Free" (No License Cost)
: The license is granted to a specific individual and cannot be shared or transferred.
If you cannot access MCNP6.2 due to regulatory restrictions, budget constraints, or processing timelines, several open-source or easily accessible Monte Carlo codes offer exceptional performance for radiation transport tracking: You will need to provide your professional or
Using an unauthorized copy of MCNP6.2 carries severe penalties:
The reason MCNP6.2 is not open-source or freeware is rooted in U.S. national security interests.
: Create an account on the official RSICC website.
MCNP6.2 is the latest iteration of the Monte Carlo N-Particle transport code. It combines the capabilities of previous versions (MCNP5 and MCNP6.1) into a single, comprehensive code capable of simulating multiple particle types ( ) over an immense energy range. For users outside the United States, the NEA
Robust support for MPI and threading to speed up complex simulations. 💡 Tips for Students
Do not risk your academic career, corporate compliance, or network security by searching for illegitimate MCNP6.2 download links. Access the software safely and legally through or the OECD/NEA Data Bank , or pivot your research to robust open-source tools like OpenMC or Geant4 .
While the software itself is technically funded by government programs, RSICC charges a distribution/handling fee to cover administrative costs. There are discounted rates available for full-time students and university faculty. 2. NEA Data Bank (Nuclear Energy Agency)
Many academic institutions (universities and colleges) have a for MCNP. If you are a student or faculty member, you can request access through your institution’s radiation safety officer or computational physics department. In this scenario, you pay nothing directly—the institution covers the license fee. But you still must sign an individual end-user agreement and complete mandatory training.