AFI-48-125(AF-dosime..

42 AFI48-125 1 MARCH 1999
a Value of quality factor (Q) at the point where the dose equivalent is maximum in a
30-cm diameter cylinder tissue-equivalent phantom.
b
Monoenergetic neutrons incident normally on a 30-cm diameter cylinder tissue-equivalent
phantom.
Quarter—A period of time equal to one-fourth of the year observed by the licensee (approximately 13
consecutive weeks), providing that the beginning of the first quarter in a year coincides with the starting
date of the year and that no day is omitted or duplicated in consecutive quarters.
Radiation Absorbed Dose or Rad—The special unit of absorbed dose. One rad is equal to an absorbed
dose of 100 ergs/gram or 0.01 joule/kilogram (0.01 gray).
radiation (ionizing radiation)—Alpha particles, beta particles, gamma rays, x-rays, neutrons,
high-speed electrons, high- speed protons, and other particles capable of producing ions. Radiation, as
used in this part, does not include non-ionizing radiation, such as radio- or microwaves, or visible,
infrared, or ultraviolet light.
radiation area—An area, accessible to individuals, in which radiation levels could result in an individual
receiving a dose equivalent in excess of 0.005 rem (0.05 mSv) in 1 hour at 30 cm from the radiation
source or from any surface that the radiation penetrates.
radiation monitoring--Evaluating—or measuring radiation levels and amounts or concentrations of
radionuclides in air, water, or other materials, to evaluate potential exposures and doses to personnel.
Radiation Safety Officer (RSO)—An individual, normally a Health Physicist, Bioenvironmental
Engineer, Department of the Air Force civilian, or a qualified Bioenvironmental Engineering Craftsman,
designated in writing by the installation commander to manage the radiation safety program for the
installation or using activity. This person may or may not be the RSO responsible for activities conducted
under a given USAF Radioactive Materials Permit. (Also referred to as Radiation Protection Officer
(RPO)
radiation sources—Material, equipment, or devices which spontaneously generate or are capable of
generating ionizing radiation. Examples include- nuclear reactors, medical and dental radiographic and
fluoroscopic x-ray systems, particle generators and accelerators, certain electromagnetic generators
operating at electrical potentials that result in the production of X rays, X-ray diffraction, industrial
radiographic, and spectrographic equipment, electron microscopes, electron-beam welding, melting, and
cutting equipment, nuclear moisture or density gauges, byproduct, source, and special nuclear materials,
natural or accelerator-produced radioactive materials, materials containing induced or deposited
radioactivity, and radioactive commodities.
Radionuclide—A radioactive species of atom characterized by its mass number (A), atomic number (Z),
and nuclear energy state, provided that the mean life of that state is long enough to be observable.
reference man—A hypothetical aggregation of human physical and physiological characteristics arrived
at by international consensus. These characteristics may be used by researchers and public health workers
to standardize results of experiments and to relate biological insult to a common base.
Roentgen Equivalent Man or rem—The special unit of any of the quantities expressed as dose
equivalent. The dose equivalent in rems is equal to the absorbed dose in rads multiplied by the quality
factor (1 rem = 0.01 sievert) (1 rem = 1,000 millirem)
respiratory protective device—An apparatus, such as a respirator, used to reduce the individual’s intake