105 CMR, § 120.902
As used in 105 CMR 120.900, the following definitions apply:
Energy Compensated Source (ECS) means a small sealed source with an activity not exceeding 3.7 megabecquerel (100 µCi), used within a logging tool or other tool components, to provide a reference standard to maintain the tool's calibration when in use.
Field Station means a facility where radioactive sources may be stored or used and from which equipment is dispatched to temporary jobsites.
Fresh Water Aquifer for the purpose of this part, means a geologic formation that is capable of yielding fresh water to a well or spring.
Injection Tool means a device used for controlled subsurface injection of radioactive tracer material.
Irretrievable Well-logging Source means 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.
Logging Assistant means the 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 105 CMR 120.951.
Logging Supervisor means the individual who uses licensed material or provides personal supervision of the utilization of sources of radiation at a temporary jobsite and who is responsible to the licensee or registrant for assuring compliance with the requirements of the Agency's regulations and the conditions of the license or registration.
Logging Tool means a device used subsurface to perform well-logging.
Mineral Logging means any logging performed for the purpose of mineral exploration other than oil or gas.
Personal Supervision means guidance and instruction by the logging supervisor who is physically present at a temporary jobsite and watching the performance of the operation in such proximity that contact can be maintained and immediate assistance given as required.
Personnel Monitoring Badge means an individual personnel dosimeter that is processed and evaluated by accredited National Voluntary Laboratory Accreditation Program (NVLAP) processor.
Radioactive Marker means radioactive material placed subsurface or on a structure intended for subsurface use for the purpose of depth determination or direction orientation.
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 result of internal inspections, new procedures or equipment, accidents or errors that have been observed, and opportunities for employees to ask safety questions.
Source Holder means a housing or assembly into which a radioactive source is placed for the purpose of facilitating the handling and use of the source in well-logging operations.
Subsurface Tracer Study means the release of unsealed radioactive material or a substance tagged with radioactive material for the purpose of tracing the movement or position of the radioactive material or tagged substance in the well-bore or adjacent formation.
Surface Casing for Protecting Fresh Water Aquifers means a pipe or tube used as a lining in a well to isolate fresh water aquifers from the well.
Temporary Jobsite means a location to which radioactive materials have been dispatched to perform wireline service operations or subsurface tracer studies.
Tritium Neutron Generator Target Source means a tritium source used within a neutron generator tube to produce neutrons for use in well-logging applications.
Uranium Sinker Bar means a weight containing depleted uranium used to pull a logging tool toward the bottom of well.
Well-bore means a drilled hole in which wireline service operations and subsurface tracer studies are performed.
Well-logging means the lowering and raising of measuring devices or tools which may contain sources of radiation into well-bores or cavities for the purpose of obtaining information about the well and/or adjacent formations.
Wireline means a cable containing one or more electrical conductors which is used to lower and raise logging tools in the well-bore.
Wireline Service Operation means any evaluation or mechanical service which is performed in the well-bore using devices on a wireline.
105 CMR, § 120.902