Abstract: Apparatuses and methods are disclosed for irradiating products. The apparatuses and methods can be used to sterilize or reduce the microbiological contamination in materials introduced into the apparatus. The apparatus includes a biological shield made from modules. It also includes a batch operated material handling system capable of moving product into a cell area without requiring an operator to enter the cell area. The apparatus is of a size that can be constructed in existing buildings. It can be decommissioned and moved to different locations. The methods disclosed include moving products into a cell area without an operator entering the cell area and subjecting the products to radiation.