The radiation chamber scene was not a retread. It was a visual juxtaposition--something common in art.
If it was a retread, Kirk and Spock would have been properly placed in their previous roles. However, Abrams intentionally switched them around as a visual cue to nuTrek's main theme.
People argue that JJ-Trek is vapid and void of substance, but when he goes and does something rather substantive, the same people dismiss it as cheap and unoriginal.
The guy just can't win.
It's more than just visual cues, the scene is re-enacted to the point that when Spock ran into the engine room I half-expected there do be an elderly Chinese guy there for Spock to bump into.