Dr Shaw at Bolton School, showed me this 1978! A balloon filled with hydrogen, explodes with a massive release of light, noise and heat.
It also gives off X-rays: Now light and X-rays can only be given out by nuclear reactions – here nuclear fusion.
1 H2+O2+turbulence->H2+O2+X-ray+E2+Sound in the turbulence of the explosion. Caused by the formation of steam
2 H2+O2+flame->H2O-E enthalpy decrease
So you are doing nuclear fusion – in the lab. A working steam engine gives out X-rays, as it does Molecular Nuclear Fusion
3 H2O+turbulence->He+O+E2+ which is why it gives out X-rays