Experimental investigation and CFD simulation of the behaviour of mineral wool in the reactor sump

Eckhard Krepper, Gregory Cartland-Glover, Alexander Grahn

    Research output: Chapter in Book/Published conference outputOther chapter contribution


    The investigation of insulation debris generation, transport and sedimentation becomes important with regard to reactor safety research for PWR and BWR, when considering the long-term behavior of emergency core cooling systems during all types of loss of coolant accidents (LOCA). The insulation debris released near the break during a LOCA incident consists of a mixture of disparate particle population that varies with size, shape, consistency and other properties. Some fractions of the released insulation debris can be transported into the reactor sump, where it may perturb/impinge on the emergency core cooling systems. Open questions of generic interest are the sedimentation of the insulation debris in a water pool, its possible re-suspension and transport in the sump water flow and the particle load on strainers and corresponding pressure drop. A joint research project on such questions is being performed in cooperation between the University of Applied Sciences Zittau/Gorlitz and the Forschungszentrum Dresden-Rossendorf. The project deals with the experimental investigation of particle transport phenomena in coolant flow and the development of CFD models for its description. While the experiments are performed at the University at Zittau/Gorlitz, the theoretical modeling efforts are concentrated at Forschungszentrum Dresden-Rossendorf. In the current paper the basic concepts for CFD modeling are described and feasibility studies including the conceptual design of the experiments are presented.
    Original languageEnglish
    Title of host publicationASME conference proceedings
    Number of pages11
    Publication statusPublished - 11 May 2008
    Event16th International Conference on Nuclear Engineering - Orlando, United States
    Duration: 11 May 200815 May 2008


    Conference16th International Conference on Nuclear Engineering
    Abbreviated titleICONE 16
    Country/TerritoryUnited States


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