<p style="text-align: justify">Molten salt reactor (MSR) is one of the promising candidate Generation IV reactor technologies for future consideration. The rapid power rise during the accident is usually a critically important threat for the safety of a reactor. In a MSR, the increasing of reactor structural temperature caused by power rise may damage the integrity of reactor pressure boundary. During the accident scenario simulation of a MSR, the trend of reactor power really depends on the initial power, power peaking factors, and fuel salt and moderator temperature reactivity coefficients. This work aims to identify how these parameters influence the consequences of the accident for a MSR. In this study, a reactivity-initiated accident is considered as the initiating event, which is caused by the withdrawal of control rod at power. This accident will lead to a rapid increase of reactor power and core temperature. A local sensitivity analysis methodology was utilized to analyze the power related parameters. Several values were selected for each parameter as the assuming initial conditions. Multiple thermal-hydraulic simulation runs through a modified RELAP5 code were performed to acquire the accident analysis results for sensitivity analysis. Some conclusions will be given in this paper, which is focused on how these power related parameters affect the accident consequences.</p>

Sensitivity Analysis of Power Related Parameters in a Reactivity-Initiated Accident of a Molten Salt Reactor

Paper Proceedings: https://asmedigitalcollection.asme.org/ICONE/ICONE28/volume/85246

2021 28th International Conference on Nuclear Engineering (ICONE28)

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