Reducing some differences with experimentally observed behavior of feedback coefficients, would require more sophisticated approaches on fuel pin model, more detailed information on management of control rods during power rise, more complicated models of primary system, its structural elements, and flow paths. Several critical cores were assembled and reactivity effects of In Pile Sections (Ips) and reflector materials were measured using the compensation with. The study demonstrated feasibility of application of relatively simple model with adjusted parameters for analysis of different conditions of very complex system. Additionally, the reactivity coefficients k, g, and h at three power levels (about 20, 50, and 80% of the nominal power) were calculated and satisfactory agreement with experimental measurements was also observed.
#Reactivity effects full
The developed core model allowed reproducing satisfactorily the core reactivity balance between zero power at 180 ☌ and full power conditions. Peculiarly, application of the model was considered for a whole range of core conditions from zero power to 100% nominal. For these effects, the model was equipped with dedicated heat structures to reproduce important feedback due to vessel wall, diagrid, strongback, control rod drive lines thermal expansion. The paper focuses on challenging issue of modeling of the transient thermal responses of primary system structural elements resulting in reactivity feedback specific to such large fast reactor, which cannot be neglected. Point kinetics neutronic model with all relevant reactivity feedbacks was used to calculate transient power. The simplified core model was developed aiming to overcome the lack of detailed information on design and realistic core conditions.
#Reactivity effects code
The analysis was performed using the TRACE system code modified for the fast reactor applications. In the paper, the reactivity characteristics of the core of the large sodium fast reactor Superphénix (SPX) were evaluated and compared with available experimental data. Journal of Verification, Validation and Uncertainty Quantification.Journal of Thermal Science and Engineering Applications.Journal of Offshore Mechanics and Arctic Engineering.Journal of Nuclear Engineering and Radiation Science.Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems.Journal of Nanotechnology in Engineering and Medicine.Journal of Micro and Nano-Manufacturing.Journal of Manufacturing Science and Engineering.Journal of Engineering Materials and Technology.Journal of Engineering for Sustainable Buildings and Cities.Journal of Engineering for Gas Turbines and Power.Journal of Engineering and Science in Medical Diagnostics and Therapy.Journal of Electrochemical Energy Conversion and Storage.Journal of Dynamic Systems, Measurement, and Control.Journal of Computing and Information Science in Engineering.Journal of Computational and Nonlinear Dynamics.Journal of Autonomous Vehicles and Systems.
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