The problem is not what was damaged, although that is a significant cost...the problem is the cost of essentially gutting the forward part of the ship, down to the bare inside of the hull, and then rebuilding it almost from scratch. From stripping and replacing hull insulation, to replacing ALL electrical cables, to replacing ventilation, hydraulics, and all manner of other systems and their required infrastructure, this is a HUGE task.
I say SCRAP IT! That’s one LESS submarine which makes 0bama happy.
What you said in addition to possible issues with the pressure hull - warping, heat-fatigue/fracturing, etc.