This standard applies to panoramic, wet source storage gamma irradiators (Category IV) and dry source storage gamma irradiators (Category II) that contain sealed gamma emitting sources for the irradiation of objects or materials. The standard establishes the criteria to be used in the proper design, fabrication, installation, use, and maintenance of these irradiators which will ensure a high degree of radiation safety. This standard is not a substitute for regulations. Nothing in this standard relieves persons from complying with applicable Federal and State requirements governing the use of these facilities to irradiate products, for example, foodstuff and medical devices.