How large a "fusion pulse", could a spacecraft possibly withstand?

I'm thinking in terms of Project Orion, https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion) and subsequent efforts and ideas. Is there any possibility, at all, of a spacecraft withstanding, and exploiting a nuclear explosion, perhaps a small H-bomb, of 100 kilotons, for example? And of most, or all, of the energy in the explosion actually serving to propel said spacecraft? http://www.projectrho.com/public_html/rocket/realdesigns2.php#id--Project_Orion