Of course I can't make you any guarantees since I don't know exactly how your array is configured, or what is what with your hardware, not to mention whether or not it's a hardware or software RAID array, but with the drives removed, it should not affect any of the data on the drives. The only real question I see is whether or not the reinstalled OS recognizes the array or if you'll have to reinstall drivers for the array to be recognized.
It may even be a configuration where the storage controller on your hard drive automatically either detects or is in fact a RAID controller in which case it's likely nothing further will need to be done.