I just had a vision of a Mini-Me Woodgeek entering stage left and continuing the presentation details, while our Woodgeek stands by laughing an uncontrollable evil belly laugh...... So my plan is build one of these, put it in a deep borehole in dry rock in a low population area, and set it off. All the energy goes into heat in the rock, and will remain there for thousands of years. Most of the radioactive reaction products (from the fusion) have short lives. Then drill other boreholes and extract the heat like its high temp geothermal.
Done. Fusion power. The bigger you make the device, the cheaper the power gets.