A review on hydrogen generation, explosion, and mitigation during severe accidents in light water nuclear reactors

Simulation of hydrogen distribution in an Indian Nuclear Reactor Containment

Large eddy simulation of turbulent flow using the parallel computational fluid dynamics code GASFLOW-MPI

Simulation of gas mixing and transport in a multi-compartment geometry using the GOTHIC containment code and relatively coarse meshes

Three-dimensional all-speed CFD code for safety analysis of nuclear reactor containment: Status of GASFLOW parallelization, model development, validation and application

Level 2 probabilistic safety assessment (PSA) has recently been performed for the Paks NPP of Hungary. This paper highlights the main analysis steps as well as the approach used to develop and quantify the level 2 PSA model. Examples are given of the results from PSA model quantification with a note on usefulness and future implications of the study.

Development of a Level 2 PSA Model for the Paks NPP

A Level 2 PSA study has recently been performed for the Paks NPP in Hungary. The probabilistic assessment of the containment loads is illustrated on the example of hydrogen combustion. Depending on the composition of the mixture the combustion mechanism could be either a turbulent deflagration or a deflagration-to-detonation transition (DDT). Hydrogen ignition as well as combustion and the associated pressure loads are described in probabilistic terms. The failure probability of the containment is calculated from pressure load and fragility distributions.

Zsolt Téchy

Papers

Development of a Level 2 PSA Model for the Paks NPP

Modelling of Severe Accident Phenomena in Level 2 PSA for Paks NPP