The Light Water Reactor Is a Great Reaktor

The first ever light bulb to get powered by a generator from a nuclear reactor was a fast reactor. We did try a lot of what are now being touted as advanced nuclear designs back in the 50s and 60s with the commercial nuclear energy program. The spiciest stuff is decaying rapidly and that's putting off thermal energy. Can we capture any of that energy it seems like you have these glowing rods that are dumping heat can we just use water and turn that heat into energy or is that just wasted somehow? I mean some people have proposed things but perhaps they don't need to be done at all.