Has anyone ever built any sort of hybridized fission-fusion power source? The only one I know of is the thermonuclear bomb.
I was joking.
You are right. If we consider the fission-fusion hybridization, the only one known is the H-bomb.
But I intentionally omitted to mention any specific physical mechanism, because I was referring to the fact that all the proposed LENR devices were actually electric-fusion hybrid devices, where electricity was the only true source of energy, while CF/LENR was claimed to be the source of alleged excess heat resulting from erroneous or misrepresented experimental data.
In space, it would be possible to hybridize the LENR device by backing it with a primary source other than electricity, such as a radioactive thermal generator. Furthermore, the telemetry system could attribute part of the heat produced by the true primary source to the LENR device, without the possibility of checking the data.
It was a joke, of course, just based on Shane D. hypothesis of a LENR test in space.