This gist is that by controlling the size of the explosion you control the energy, and thus can keep it within a range that the materials you're using can handl

This gist is that by controlling the size of the explosion you control the energy, and thus can keep it within a range that the materials you're using can handle. I realize that's a hand-wavy statement, but a lot of actual research has gone into this, and it seems like it should work without exotic materials.