Document: 10 CFR Part 20
Document ID: f9fa227e-b871-4624-b491-d8e41103d10e
Document Type: cfr
Title: Definitions.
Source: 10 CFR Part 20
Source URL: https://www.ecfr.gov/current/title-10/part-20/section-20.1003
Revision Date: 
Chapter: 
Section ID: 20.1003
CFR Part: 20
CFR Title: 10

Content:
es designed to be worn by an individual; ( 2 ) The assessment of committed effective dose equivalent by bioassay (see Bioassay ) or by determination of the time-weighted air concentrations to which an individual has been exposed, i.e., DAC-hours; or ( 3 ) The assessment of dose equivalent by the use of survey data. Individual monitoring devices (individual monitoring equipment) means devices designed to be worn by a single individual for the assessment of dose equivalent such as film badges, thermoluminescence dosimeters (TLDs), pocket ionization chambers, and personal (“lapel”) air sampling devices. Internal dose means that portion of the dose equivalent received from radioactive material taken into the body. Lens dose equivalent (LDE) applies to the external exposure of the lens of the eye and is taken as the dose equivalent at a tissue depth of 0.3 centimeter (300 mg/cm 2 ). License means a license issued under the regulations in parts 30 through 36 , 39 , 40 , 50 , 60 , 61 , 63 , 70 , or 72 of this chapter . Licensed material means 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 means the holder of a license. Limits (dose limits) means the permissible upper bounds of radiation doses. Loose-fitting facepiece means a respiratory inlet covering that is designed to form a partial seal with the face. Lost or missing licensed material means 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. Member of the public means any individual except when that individual is receiving an occupational dose. Minor means an individual less than 18 years of age. Monitoring (radiation monitoring, radiation protection monitoring) means the measurement of radiation levels, concentrations, surface