Institute for Nuclear Waste Disposal

KOLLORADO-e3: Integrity of the bentonite barrier for the retention of radionuclides in crystalline host rock - experiments and modeling

  • contact:

    Christian Marquardt

  • funding:

    BMWi

  • Partner:

    Gesellschaft für Anlagen- und Reaktorsicherheit (GRS, Braunschweig)

    Institute for Nuclear Waste Disposal (KIT-INE)

  • startdate:

    2019

  • enddate:

    2022

The KOLLORADO-e3 project focuses on the erosion stability of compacted bentonite (geotechnical barrier) as a function of the contact water chemistry/hydraulics and the formation of near-field colloids/nanoparticles as potential carriers for actinides/radionuclides. Both, a detailed experimental program quantifying the bentonite erosion and investigating the influence of surface roughness/charge heterogeneity on nanoparticle mobility and actinide bentonite nanoparticle sorption reversibility, as well as approaches to implement the acquired process understanding in reactive transport modelling codes comprise the project activities.