The HFIR Gamma Irradiation Facility is an experiment facility in the High Flux Isotope Reactor designed to irradiate materials with gamma radiation from the spent fuel elements in the HFIR loading station in the clean pool. The Gamma Irradiation Facility Chamber is a stainless steel chamber made of 0.065 wall thickness tubing to maximize the internal dimensions of chamber to accommodate as/ large as possible samples and still fit inside the cadmium post of the spent fuel loading station positions. The interior chamber is approximately inside diameter and will accommodate samples up to long.