NAS is pleased to offer Basic RETRAN training using the Microsoft Teams platform. The next training session will be held on October 16-27, 2023. The online Basic RETRAN Training covers the same topics as the in-person training. The training is held in four-hour daily classes over a 10-day duration.

Primary features of the RETRAN-3D code are discussed and include:

• The theoretical basis of the code (balance equations, constitutive models, and neutron kinetics equations).
• The component and special purpose models.
• The steady-state initialization option.
• The meaning and use of various input quantities.
• The selection of input options.
• Appropriate nodalization for the type of analysis being performed.
• The understanding and interpretation of RETRAN results.
• Common modeling practices, pitfalls for the user, and how to resolve them.
• Differences between models in RETRAN-02 and RETRAN-3D.

The RETRAN Integrated Software Package (RISP) will be used during the sample problem sessions. The sample problems can be run on PCs or workstations. An electronic version of the lecture material and computer sample problem information will be provided.

The cost of the training session is $3,000 for each participant. If your organization is a current member of the RETRAN User Group, a 10% discount will be applied to the training session fee.

If you would like to register/pay for this session and are a member of the RETRAN User Group, please click on 'User Group Member'. If you are not a member of the RETRAN User Group, click the 'Non-Member' button below.


We hold standardized training services at our facilities and online regularly, but we can also provide custom courses designed to meet your specific needs. These courses can be held at your facilities to provide cost-effective training for your staff.