The document summarizes research from the FEBEX-DP collaboration which studied the dismantling of heaters from an in situ heating test of bentonite clay at the Grimsel Test Site in Switzerland. Key findings include: 1) Coupled THMC modeling of the experiment showed reasonable matches to observed temperature, relative humidity, water content, stress, and chloride concentration over time. 2) Synchrotron X-ray microtomography measurements characterized the microstructure and crack network in bentonite clay samples. 3) Initial characterization of the bentonite-concrete interface by SEM-EDS showed cracks abundant at the interface but no strong elemental gradients beyond the interface region. 4) Ongoing work