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TeachMeFinance.com - explain Orphan sources (unwanted radioactive material) Orphan sources (unwanted radioactive material) The term 'Orphan sources (unwanted radioactive material)' as it applies to the area of nuclear science can be defined as ' Sealed sources of radioactive material contained in a small volume (but not radioactively contaminated soils and bulk metals) in any one or more of the following conditions: An uncontrolled condition that requires removal to protect public health and safety from a radiological threat A controlled or uncontrolled condition, for which a responsible party cannot be readily identified A controlled condition, compromised by an inability to ensure the continued safety of the material (e.g., the licensee may have few or no options to provide for safe disposition of the material) An uncontrolled condition, in which the material is in the possession of a person who did not seek, and is not licensed, to possess it An uncontrolled condition, in which the material is in the possession of a '. Previous 5 Terms: Orographic Waves orology oropendola Orphan Anvil orphan drugs Next 5 Terms: orthoepy orthogenesis orthography orthophoto map orthophotograph About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.