A hermetic compartment model has been developed in order to describe the behaviour of hermetic rooms and bubbler tower in VVER-440/213 nuclear power plants. Both normal operation and accidental conditions are considered. The numerical models simulate the main physical phenomena in the VVER containment including thermal hydraulic phenomena, heat conduction in the walls, condensation, and operation of different safety systems. The applied nodalisation scheme describes the complex geometry of the power plant. Robust and fast calculation methods have been introduced to achieve strong numerical stability. The stability of the calculation is very important because this system is not just used by scientists in off-line analyses, but also in the training of nuclear power plant operators. The capabilities of the models are demonstrated with simulation of two loss-of-coolant accidents with different break sizes.
- Containment thermal hydraulics
- Loss-of-coolant accident
- Training simulator
ASJC Scopus subject areas
- Nuclear Energy and Engineering