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@INPROCEEDINGS{DominiguezBugarin:1038866,
      author       = {Dominiguez-Bugarin, A. and Serra, G. and Jimenez, G. and
                      Vázquez-Rodríguez, Carlos and Reinecke, Ernst-Arndt and
                      Kelm, Stephan and Gupta, S. and Jimenez, M.-A.},
      title        = {{V}alidation of the {PARUPM} and {GOTHIC} 8.3 code coupling
                      using {THAI} hydrogen recombination tests},
      reportid     = {FZJ-2025-01682},
      year         = {2024},
      abstract     = {In case of a severe accident in a nuclear power plant
                      (NPP), large amounts of H2 and CO could be
                      generated,potentially leading to uncontrolled combustion if
                      concentrations within the flammability thresholds
                      arereached. To mitigate this hazard, many NPPs equipped
                      their containment buildings with passiveautocatalytic
                      recombiners (PARs). PARs are capable of recombining
                      combustible gases such as H2 or COwith oxygen, resulting in
                      the production of steam and/or CO2, even when gas
                      concentrations fall below theflammability threshold.The
                      AMHYCO project (Euratom 2019-2020, GA Nº 945057) aims to
                      advance experimental understandingand simulation
                      capabilities for H2/CO combustion risk management in severe
                      accidents. Within theframework of this project, the
                      computational model PARUPM, which uses a physicochemical
                      approach tosimulate PARs, has been validated as a standalone
                      tool using experimental data obtained from both theREKO-3
                      flow channel at FZJ and the OECD/NEA THAI projects executed
                      at Becker Technologies GmbH.In a next phase, PARUPM has been
                      integrated as an add-on program within the thermohydraulic
                      simulationcode GOTHIC. This code coupling facilitates the
                      evaluation of the interaction between the operation ofPARs
                      and the surrounding atmosphere in which they are located.The
                      present paper provides an overview of the capabilities of
                      the joint simulation with PARUPM – GOTHIC8.3. The coupling
                      to GOTHIC has been validated based on a sequence of
                      experiments on H2 recombinationby PARs performed at the THAI
                      experimental facility. The relevant feedback from the THAI
                      vessel to therecombiners performance involving gas
                      stratification and change of boundary conditions is studied
                      by a 3Dmodel which reproduces the complex behaviour of gases
                      inside the THAI vessel during the experiments.},
      month         = {May},
      date          = {2024-05-13},
      organization  = {ERMSAR2024, Stockholm (Sweden), 13 May
                       2024 - 16 May 2024},
      cin          = {IET-4},
      cid          = {I:(DE-Juel1)IET-4-20191129},
      pnm          = {1422 - Beyond Design Basis Accidents and Emergency
                      Management (POF4-142)},
      pid          = {G:(DE-HGF)POF4-1422},
      typ          = {PUB:(DE-HGF)1},
      url          = {https://juser.fz-juelich.de/record/1038866},
}