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20.2007 Compliance with environmental and health protection regulations. means— (1) The assessment of dose equivalent by the use of devices 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.

means an area, accessible to individuals, in which radiation levels from radiation sources external to the body could result in an individual receiving a dose equivalent in excess of 0.1 rem (1 m Sv) in 1 hour at 30 centimeters from the radiation source or 30 centimeters from any surface that the radiation penetrates.

20.2107 Records of dose to individual members of the public. means a woman who has voluntarily informed the licensee, in writing, of her pregnancy and the estimated date of conception. This includes entry or exit portals of sufficient size to permit human entry, irrespective of their intended use.

20.2201 Reports of theft or loss of licensed material. 20.2203 Reports of exposures, radiation levels, and concentrations of radioactive material exceeding the constraints or limits. 20.2205 Reports to individuals of exceeding dose limits. 20.2207 Reports of transactions involving nationally tracked sources. Materials are classified as D, W, or Y, which applies to a range of clearance half-times: for Class D (Days) of less than 10 days, for Class W (Weeks) from 10 to 100 days, and for Class Y Years) of greater than 100 days. 7101 et seq.) to the extent that the Department, or its duly authorized representatives, exercises functions formerly vested in the U. Atomic Energy Commission, its Chairman, members, officers, and components and transferred to the U. Energy Research and Development Administration and to the Administrator thereof pursuant to sections 104 (b), (c), and (d) of the Energy Reorganization Act of 1974 (Pub. means any location through which an individual could gain access to radiation areas or to radioactive materials.

means a respirator that supplies the respirator user with breathing air from a source independent of the ambient atmosphere, and includes supplied-air respirators (SARs) and self-contained breathing apparatus (SCBA) units. (DAC-hour) is the product of the concentration of radioactive material in air (expressed as a fraction or multiple of the derived air concentration for each radionuclide) and the time of exposure to that radionuclide, in hours. means the dose received by an individual in the course of employment in which the individual's assigned duties involve exposure to radiation or to radioactive material from licensed and unlicensed sources of radiation, whether in the possession of the licensee or other person. Radiation-induced cataract formation is an example of a nonstochastic effect (also called a deterministic effect). means to remove a facility or site safely from service and reduce residual radioactivity to a level that permits— (1) Release of the property for unrestricted use and termination of the license; or (2) Release of the property under restricted conditions and termination of the license. means a quantitative estimate of the fit of a particular respirator to a specific individual, and typically estimates the ratio of the concentration of a substance in ambient air to its concentration inside the respirator when worn. The declaration remains in effect until the declared pregnant woman withdraws the declaration in writing or is no longer pregnant. means a negative pressure particulate respirator with a filter as an integral part of the facepiece or with the entire facepiece composed of the filtering medium, not equipped with elastomeric sealing surfaces and adjustable straps.

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(a) The regulations in this part establish standards for protection against ionizing radiation resulting from activities conducted under licenses issued by the Nuclear Regulatory Commission.

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