Yes. Orion was a credible bomb powered rocket plan. The energy released is mostly thermal, metallic mirror will work to reflect it and if there are superheated

Yes. Orion was a credible bomb powered rocket plan. The energy released is mostly thermal, metallic mirror will work to reflect it and if there are superheated gasses involved, you can direct these with rocket nozzles for example. The problem will be attaching that reflector so that it does not fly off.