Assessment of CTF Needs for Modeling of Boiling Water Reactors
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The Consortium for Advanced Simulation of Light Water Reactors (CASL)–developed Virtual Environment for Reactor Applications (VERA) core simulator is undergoing further development to support development of boiling water reactor (BWR) models. CTF is the thermal-hydraulic component of VERA that is used for thermal feedback and prediction of thermal-hydraulic parameters of interest such as departure from nucleate boiling. CTF, being equipped with two-phase flow modeling capabilities, is applicable for BWR analysis; however, work is needed to improve usability of the code and bring its quality for these applications up to the standards required of VERA. While some work has been done in CASL for BWR applications by developing a BWR preprocessor, performing two-phase validation work, and implementing a modeling approach for the separated flow paths of BWR geometry, additional work is needed to make the capability more production level and to add critical required features. This report summarizes the current immediate needs in CTF that will improve its applicability to modeling of common BWR designs and nominal operating conditions. These improvements will focus on usability improvements (support of BWR geometric features in the CTF model) as well as modeling accuracy improvements for two-phase flow. A summary of current work done to prepare CTF for these changes is given. It is intended that these developments will be incrementally made over the coarse of the next two years of the project.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1619034
- Report Number(s):
- ORNL/TM-2020/3
- Country of Publication:
- United States
- Language:
- English
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