NuScale SMR 3-D modelling and analysis of boron dilution with the system code ATHLET in the framework of McSAFER


NuScale SMR 3-D modelling and analysis of boron dilution with the system code ATHLET in the framework of McSAFER

Diaz Pescador, E.; Jobst, M.; Kliem, S.

The small modular reactor (SMR) NuScale is modelled by Helmholtz-Zentrum Dresden Rossendorf (HZDR) in the framework of the EU H2020 McSAFER. NuScale is a SMR of integral pressurized type operated with light water driven by natural circulation. This work summarizes the reactor modelling approach with the system code ATHLET and presents the results from a boron dilution sequence, based on the Design Certification Application (DCA). Steady-state and transient results show agreement, thereby demonstrating ATHLET strong simulation capabilities on complex transients applied to SMR designs. The results show a decrease in core nominal boron concentration and subsequent reactivity insertion by the boron feedback. The reactor is tripped upon “high pressurizer pressure” setpoint and the actuation of the DHRS leads to a long term safe shutdown condition.

  • Contribution to proceedings
    KERNTECHNIK 2022, 21.06.2022, Leipzig, Germany
  • Lecture (Conference)
    KERNTECHNIK 2022, 21.06.2022, Leipzig, Germany

Permalink: https://www.hzdr.de/publications/Publ-36003
Publ.-Id: 36003