Sorry for the bad quality.
My grandfather had this in his office. He worked as a computer engineer so I initally thought it was a zoomed-in picture of a computer chip or something, but maybe it is something large.
He’s not alive anymore so I can’t ask him. If somebody can help me out, that would be great.
Those are definitely pipes. It looks like a complex heat exchanger and given the size and the further array under it, I’d wager it’s a nuclear reactor assembly.