Abbreviations,Acronyms, Codes, Initialisms, and Symbols

DOE-STD-1121-98

radon: For purposes of this DOE Standard, unless otherwise specified, the isotope 222Rn.

respiratory tract model: A mathematical representation of the behavior of particles and gases in the

human respiratory tract.

retained quantity: The amount of material which, after being taken into the body by inhalation,

ingestion, entry through an open wound, or absorption through the skin, exists in the whole body, a

compartment, an organ, or a tissue at a specified time.

screening measurements: Measurements made to detect radioactive material under routine conditions,

but not used to quantify the amount of a given radionuclide. (HPS N13.30-1996)

service laboratory: Laboratory performing direct and/or indirect radiobioassay measurements. (HPS

N13.30-1996)

thermodynamic particle diameter (dth): Diameter (in :m) of a spherical particle that has the same

diffusion coefficient in air as the particle of interest. (ICRP 1994a)

thoron: The isotope 220Rn, also symbolized by Tn. Thoron is a "trivial name" like tritium.

translocation: Movement within the body of a radioactive material after uptake, such as from bone to

kidney.

working level (WL): is any combination of the short-lived radioactive progeny in one liter of air, without

regard to the degree of equilibrium, that will result in the ultimate emission of 130,000 MeV of alpha

energy (1 WL = 2.083 E-5 J/m3). (10 CFR 835)

Note: WL is the unit of potential alpha energy concentration (PAEC)

working level month (WLM): The unit of potential alpha energy exposure (PAEE), defined as exposure

for 1 working month (of 170 hours) to an airborne concentration of 1 WL. (1 WLM = 1 WL 170 hours

= 0.00354 JAh/m3).

wound compartment: The compartment in a biokinetic model whose retained quantity is the amount of

radioactive material in a wound that has not moved to the transfer compartment.

2.4 ABBREVIATIONS, ACRONYMS, CODES, INITIALISMS, AND SYMBOLS

alpha

beta

)Amin

detection sensitivity

prefix micro (10!6)

ACGIH

American Conference of Governmental Industrial Hygienists

AEDE

annual effective dose equivalent

ALARA

as low as reasonably achievable

ALE

annual limit on exposure

ALI

annual limit on intake

AMAD

activity median aerodynamic diameter

AMD

acceptable missed dose