Nebraska Administrative Code
Topic - HEALTH AND HUMAN SERVICES SYSTEM
Title 180 - CONTROL OF RADIATION
Chapter 14 - RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING AND SUBSURFACE TRACER STUDIES
Section 180-14-002 - DEFINITIONS

002.01 ENERGY COMPENSATION SOURCE (ECS). A small sealed source, with an activity not exceeding 3.7 megabecquerels (MBq) or 100 microcuries (µCi), used within a logging tool, or other tool components, to provide a reference standard to maintain the tool's calibration when in use.

002.02 FIELD STATION. A facility where radioactive sources may be stored or used and from which equipment is dispatched to temporary jobsites.

002.03 FRESH WATER AQUIFER. A geologic formation capable of yielding fresh water to a well or spring, except those aquifers exempted according to 40 CFR 122.35.

002.04 INJECTION TOOL. A device used for controlled subsurface injection of radioactive tracer material.

002.05 IRRETRIEVABLE WELL LOGGING SOURCE. Any sealed source containing radioactive material that is pulled off or not connected to the wireline that suspends the source in the well and for which all reasonable effort at recovery has been expended.

002.06 LOGGING ASSISTANT. 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 performs surveys required by 180 NAC 14-020.

002.07 LOGGING SUPERVISOR. An individual who uses radioactive material or provides personal supervision in the use of radioactive material at a temporary jobsite and is responsible to the licensee for assuring compliance with the regulation requirements and conditions of the license.

002.08 LOGGING TOOL. A device used subsurface to perform well logging.

002.09 PERSONAL SUPERVISION. Guidance and instruction by a logging supervisor, who is physically present at a temporary jobsite, in personal contact with logging assistants, and can give immediate assistance.

002.10 RADIOACTIVE MARKER. Radioactive material used for depth determination or direction orientation. This includes radioactive collar markers and radioactive iron nails.

002.11 SAFETY REVIEW. A periodic review provided by the licensee for its employees on radiation safety aspects of well logging. The review may include results of internal inspections, new procedures or equipment, accidents or errors that have been observed, and opportunities for employees to ask safety questions.

002.12 SOURCE HOLDER. A housing or assembly into which a sealed source is placed to facilitate the handling and use of the source in well logging.

002.13 SUBSURFACE TRACER STUDY. The release of unsealed radioactive material or a substance labeled with radioactive material in a single well for the purpose of tracing the movement or position of the material or substance in the well or adjacent formation.

002.14 SURFACE CASING FOR PROTECTING FRESH WATER AQUIFERS. A pipe or tube used as a lining in a well to isolate fresh water aquifers from the well.

002.15 TEMPORARY JOBSITE. A place where radioactive materials are present for the purpose of performing well logging or subsurface tracer studies.

002.16 TRITIUM NEUTRON GENERATOR TARGET SOURCE. A tritium source used within a neutron generator tube to produce neutrons for use in well logging applications.

002.17 URANIUM SINKER BAR. A weight containing depleted uranium used to pull a logging tool toward the bottom of a well.

002.18 WELL. A drilled hole for the purpose of oil, gas, mineral, groundwater, or geological exploration where well logging may be performed

002.19 WELL LOGGING. All operations involving the lowering and raising of measuring devices or tools which contain radioactive material or are used to detect radioactive materials in wells for the purpose of obtaining information about the well or adjacent formations which may be used in oil, gas, mineral, groundwater, or geological exploration.