Integration of the inspection cell and overpacking cell with this system is fairly complex. Both cells have facilities involving the use of particulates which could contaminate waste packages, causing defects. Therefore airflow from these cells should not meet other flows before the return side, and in the case of the vaults, after the outlet. The inspection cell is located at the front of each vault; this proves difficult to integrate from a view to optimising ventilation, therefore it is proposed the inspection cells require a separate ventilation outlet which bypasses the vault and rejoins the airflow at the end of the vault. This would be very simple to engineer; ventilation pipes along the vault wall would suffice.