Recent developments extending the capabilities of the SIMMER-III [1, 2] code for the dealing with transient and accidents in Molten Salt Reactors (MSRs) are presented. These extensions refer to the movable precursor modeling within the space-time dependent neutronics framework of SIMMER-III, to the molten salt flow modeling, and to new equations of state for various salts. An important new SIMMER-III feature is that the space-time distribution of the various precursor families with different decay constants can be computed and took into account in neutron/reactivity balance calculations and, if necessary, visualized. The system is coded and tested for a molten salt transmutater. This new feature is also of interest in core disruptive accidents of fast reactors when the core melts and the molten fuel is redistributed.
- Nuclear Engineering Division
Transient Analyses for a Molten Salt Transmutation Reactor Using the Extended SIMMER-III Code
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Wang, S, Rineiski, A, Maschek, W, & Ignatiev, V. "Transient Analyses for a Molten Salt Transmutation Reactor Using the Extended SIMMER-III Code." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 4: Computational Fluid Dynamics, Neutronics Methods and Coupled Codes; Student Paper Competition. Miami, Florida, USA. July 17–20, 2006. pp. 91-99. ASME. https://doi.org/10.1115/ICONE14-89209
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