AFI-48-125(AF-dosime..

AFI48-125 1 MARCH 1999 39
lens-dose equivalent (HE )(LDE)—The dose equivalent to the lens of the eye from external exposure of
the lens of the eye to some ionizing radiation source. It is measured at an eye lens tissue depth of 0.3 cm
(300 mg/cm 2 ).
License—A license issued under the regulations in parts 30 through 36, 39, 40, 50, 60, 61, 70, or 72 of the
NRC.
licensed material—Source material, special nuclear material, or byproduct material received, possessed,
used, transferred or disposed of under a general or specific license issued by the Commission.
Licensee—The holder of a license.
limits (dose limits)—The permissible upper bounds of radiation doses.
lost or missing licensed material—Licensed material whose location is unknown. It includes material
that has been shipped but has not reached its destination and whose location cannot be readily traced in
the transportation system.
Master Radiation Exposure Registry (MRER)—The USAF’s sole permanent record keeping registry
of occupational ionizing radiation exposures for all personnel (past and present) enrolled in the Dosimetry
program. The US Air Force Center for Radiation Dosimetry maintains the MRER.
member of the public—Any individual except when that individual is receiving an occupational dose.
Minor—An individual less than 18 years of age.
monitoring (radiation monitoring, radiation protection monitoring)—The measurement of radiation
levels, concentrations, surface area concentrations or quantities of radioactive material and the use of the
results of these measurements to evaluate potential exposures and doses.
National Voluntary Laboratory Accreditation Program (NVLAP)—A program administered by the
National Institute of Standards and Technology (NIST) for the accreditation of ionizing radiation
dosimetry processing laboratories. Accreditation is based on three rounds of open blind performance
testing and site visits conducted by NVLAP National Technical Experts and is repeated every two years.
Separate standards applicable to whole body and extremity dosimetry are detailed in NIST Handbook
150, NIST Handbook 150-4, and standards published by the Health Physics Society.
nonstochastic effects—Health effects, the severity of which varies with the dose and for which a
threshold is believed to exist. Radiation-induced cataract formation is an example of a nonstochastic
effect (also called a deterministic effect).
Occasionally- exposed individual—An individual whose work is not normally performed in a restricted
area and whose duties do not normally involve exposure to ionizing radiation or radioactive material.
Such individuals may, however, have reason to enter a restricted area in the performance of their duties.
Examples are messengers, deliverymen, and maintenance workers.
occupational dose—The dose received by an individual in the course of employment in which the
individual’s assigned duties involve exposure to radiation and/or radioactive material from licensed and
unlicensed sources of radiation, whether in the possession of the licensee or other person. Occupational
dose does not include doses received from background radiation, from any medical administration the
individual has received, from voluntary participation in medical research programs, or as a member of the
public.
occupationally-exposed individual—Any individual who receives an occupational dose of radiation as a