As we've progressed our inspection, we have covered more of the circumference of the vessel. Initially we were dealing with one leak, and as we increased our ability to inspect, we found other locations where there was corrosion. We now believe as many as nine areas on the vessel will require repair. They're all relatively small, very similar, and located at a similar height above the base of the vessel. So there is a band around a portion of the base of the vessel where this corrosion is present.
We have now completed the inspection of the full circumference through this band at that elevation, so we feel much more confident that we have the necessary information to specify the repair technology we need to apply and move forward to manufacture the tooling and implement that repair.
With the nine sites, it became apparent that there was little additional schedule time required to put a band of weld built up around the base of the vessel instead of simply repairing individual sites. So by applying a band of weld repair as the basis for our schedule, we essentially found that schedule. If we were to identify some additional sites within this general region, that would not further extend the schedule to repair the NRU.