Serpent Monte Carlo code — Serpent docs documentation (original) (raw)

Last edited: 2025-10-17 / JLe

Serpent is a Monte Carlo neutron and photon transport code, used for various reactor physics, fusion neutronics, and radiation transport applications. The code is developed as part of the Kraken multi-physics computational framework atVTT Technical Research Centre of Finland. This documentation provides instructions for installation, a user guide, a methodology description, and various other resources for users.

The documentation is still a work in progress, with several references to theSerpent Wiki. A more general description of the Serpent code, including information on code distribution, can be found on theproject website. See also theSerpent discussion forumfor support on technical issues.

The Serpent software is proprietary and subject to export control restrictions. The terms and conditions for using Serpent are outlined in the software licence agreement.

Note

When referencing the Serpent code, please cite the following publication:

J. Leppänen, V. Valtavirta, A. Rintala and R. Tuominen. Status of the Serpent Monte Carlo code in 2024.EPJ Nuclear Sci. Technol., 11:3, 2025.doi: 10.1051/epjn/2024031

Contents

• 1. Installation guide
• 2. User guide
• 3. Methodology description
• 4. Serpent data repository
• 5. Tutorial

Appendices

• Input syntax manual
• ENDF reaction MT’s and macroscopic reaction numbers
• CSG Surface types
• Lattice types
• Pitfalls and troubleshooting
• Built-in isotope abundances
• Units and constants
• Reserved input card names
• Fallback options
• Identified bugs
• Publications related to Serpent development