Licensed material means byproduct, source, or special nuclear material received, processed, used, or transferred under a license issued by the Commission under the regulations in this chapter. Logging assistant means any individual who, under the personal supervision of a logging supervisor, handles sealed sources or tracers that are not in logging tools or shipping containers or who performs surveys required by 39.67. Logging supervisor means an individual who uses licensed material or provides personal supervision in the use of licensed material at a temporary jobsite and who is responsible to the licensee for assuring compliance with the requirements of the Commission's regulations and the conditions of the license. Logging tool means a device used subsurface to perform well logging. Personal supervision means guidance and instruction by a logging supervisor, who is physically present at a temporary jobsite, who is in personal contact with logging assistants, and who can give immediate assistance.
Radioactive marker means licensed material used for depth determination or direction orientation.
For purposes of this part, this term includes radioactive collar markers and radioactive iron nails. Safety review means a periodic review provided by the licensee for its employees on radiation safety aspects of well logging. The review may include, as appropriate, the results of internal inspections, new procedures or equipment, accidents or errors that have been observed, and opportunities for employees to ask safety questions. Sealed source means any licensed material that is encased in a capsule designed to prevent leakage or escape of the licensed material. Source holder means a housing or assembly into which a sealed source is placed to facilitate the handling and use of the source in well logging.