Abstract: A temporary shelter for housing and shielding a high energy radiation source used to irradiate objects and includes a hot cell for enclosing the source. An outer perimeter structure, including at least one wall, substantially encloses the hot cell and together with the cell forms an interior space positioned between the cell and outer wall. The interior space is filled with sand, covering the cell except for a front opening into the cell. The walls of the cell and outer structure are comprised of a rail and panel structure tied together with wire form ties to provide internal structural integrity against the weight of the sand. The sand and appropriately located other high energy attenuating components attenuate the energy emissions to a value less than the MPD Distance for the particular high energy radiation emitting source immediately to the exterior of the shelter.