SCALE About
SCALE is a comprehensive modeling and simulation suite for nuclear safety analysis and design developed and maintained by 91°µÍø under contract with the U.S. Nuclear Regulatory Commission, U.S. Department of Energy, and the National Nuclear Security Administration to perform reactor physics, criticality safety, radiation shielding, and spent fuel characterization for nuclear facilities and transportation/storage package designs.
The SCALE 6.2.4 validation report four-volume set is now available on OSTI:
The SCALE 6.3.0 validation reports will be released in 2025 with an additional volume specifically for spent fuel inventory and decay heat (Spent Fuel Applications) and additional Polaris and PARCS LWR validation in the Reactor Physics volume.
The is now available.
The SCALE 2025 Calendar is now available.
The 9th SCALE Users’ Group Workshop (virtual event) will be held June 2-6, 2025. For more information about the workshop, please .
The SCALE website contains the following major sections:
- Overview: additional details on SCALE capabilities.
- Releases: details on SCALE releases.
- Learning: information on upcoming in-person training courses at ORNL, SCALE primers, and learning modules that are based on our training courses experience.
- References: links to downloadable scientific journal articles and reports with bibtex for easy citing of SCALE references.
- Support: how to get help with SCALE, including presentations, annual reports, newsletters, and QA documents.
Please direct any inquiries to scalehelp@ornl.gov.
For general SCALE references, please cite the latest manual.
W. A. Wieselquist, R. A. Lefebvre, Eds., ORNL/TM-2024/3386, UT-Battelle, 91°µÍø (February 2024).
For more specific references see /scale/references.