CHAPTER 459 - HAZARDOUS MATERIALS

NAC 459.0145 “Activity” defined. (NRS 459.030, 459.201) “Activity” means the rate of disintegration or decay of radioactive material. The units of activity are the curie and the becquerel. (Added to NAC by Bd. of Health, eff. 1-18-94; A by Dep’t of Human Resources by R137-01, 5-3…

NAC 459.0147 “Address of use” defined. (NRS 459.201) “Address of use” means the building or buildings that are identified on the license and where radioactive materials may be received, used or stored. (Added to NAC by Bd. of Health, eff. 11-1-95)

NAC 459.015 “Adult” defined. (NRS 459.201) “Adult” means any person who is 18 years of age or older. (Added to NAC by Bd. of Health, eff. 1-18-94)

NAC 459.016 “Agreement state” defined. (NRS 459.201) “Agreement state” means any state with which the Nuclear Regulatory Commission has entered into an effective agreement under section 274(b) of the Atomic Energy Act of 1954, as amended, 73 Stat. 689. [Bd. of Health, Radiation C…

NAC 459.018 “Airborne radioactive material” defined. (NRS 459.201) “Airborne radioactive material” means any radioactive material dispersed in the air in the form of dust, fumes, mists, particulates, vapors or gases. [Bd. of Health, Radiation Control Reg. § 1.2.3, eff. 2-28-80]—(…

NAC 459.0182 “Air-purifying respirator” defined. (NRS 459.201) “Air-purifying respirator” means a respirator with an air-purifying filter, cartridge or canister that removes specific air contaminants by passing ambient air through the air-purifying element. (Added to NAC by Bd. o…

NAC 459.0185 “Annual limit on intake” defined. (NRS 459.201) “Annual limit on intake” means the limit for the amount of radioactive material taken into the body of an adult worker during the course of his or her employment, by inhalation or ingestion, in 1 year. The annual limit …

NAC 459.019 “Appendix A” defined. (NRS 459.201) “Appendix A” means Appendix A to 10 C.F.R. §§ 20.1001 to 20.2402, inclusive. (Added to NAC by Bd. of Health, eff. 1-18-94; A by R085-06, 11-13-2006; R144-13, 10-13-2016)

NAC 459.0192 “Appendix B” defined. (NRS 459.201) “Appendix B” means Appendix B to 10 C.F.R. §§ 20.1001 to 20.2402, inclusive. (Added to NAC by Bd. of Health, eff. 1-18-94; A by R085-06, 11-13-2006; R185-08, 5-7-2010; R144-13, 10-13-2016)

NAC 459.0194 “Appendix C” defined. (NRS 459.201) “Appendix C” means Appendix C to 10 C.F.R. §§ 20.1001 to 20.2402, inclusive. (Added to NAC by Bd. of Health, eff. 1-18-94; A by R085-06, 11-13-2006; R144-13, 10-13-2016)

NAC 459.0195 “Appendix E” defined. (NRS 459.201) “Appendix E” means Appendix E to 10 C.F.R. §§ 20.1001 to 20.2402, inclusive. (Added to NAC by Bd. of Health by R149-07, eff. 1-30-2008; A by R144-13, 10-13-2016)

NAC 459.0196 “Appendix G” defined. (NRS 459.201) “Appendix G” means Appendix G to 10 C.F.R. §§ 20.1001 to 20.2402, inclusive. (Added to NAC by Bd. of Health by R085-06, eff. 11-13-2006; A by R144-13, 10-13-2016)

NAC 459.020 “Area of airborne radioactivity” defined. (NRS 459.201) “Area of airborne radioactivity” means any room, enclosure or area in which airborne radioactive material exists in concentrations: 1. In excess of the derived air concentrations specified in Appendix B; or 2. To…

NAC 459.0203 “Area of use” defined. (NRS 459.201) “Area of use” means a portion of an address of use that has been set aside for the purpose of receiving, using and storing radioactive materials. (Added to NAC by Bd. of Health, eff. 11-1-95)

NAC 459.0205 “As low as is reasonably achievable” defined. (NRS 459.030, 459.201) “As low as is reasonably achievable” means making every reasonable effort to maintain exposures to radiation as far below the applicable limits as is practical, in a manner that is consistent with t…

NAC 459.02055 “Assigned protection factor” defined. (NRS 459.201) “Assigned protection factor” means the expected level of respiratory protection in a workplace that would be provided by a properly functioning respirator or class of respirators to properly fitted and trained user…

NAC 459.02065 “Atmosphere-supplying respirator” defined. (NRS 459.201) “Atmosphere-supplying respirator” means a respirator that supplies the user with breathing air from a source independent of the ambient atmosphere, and includes, without limitation, a supplied-air respirator a…

NAC 459.02068 “Authorized medical physicist for electronic brachytherapy” defined. (NRS 459.201) “Authorized medical physicist for electronic brachytherapy” means a person who has met the requirements of NAC 459.5923. (Added to NAC by Bd. of Health by R185-08, eff. 5-7-2010)

NAC 459.0207 “Authorized nuclear pharmacist” defined. (NRS 459.201) “Authorized nuclear pharmacist” has the meaning ascribed to it in 10 C.F.R. § 35.2, as adopted by reference pursuant to NAC 459.3062. (Added to NAC by Bd. of Health by R084-98, eff. 1-26-99; A by R085-06, 11-13-2…

NAC 459.0208 “Authorized user” defined. (NRS 459.201) “Authorized user” has the meaning ascribed to it in 10 C.F.R. § 35.2, as adopted by reference pursuant to NAC 459.3062. (Added to NAC by Bd. of Health, eff. 11-1-95; A by R084-98, 1-26-99; R085-06, 11-13-2006)

NAC 459.021 “Background radiation” defined. (NRS 459.030, 459.201) 1. “Background radiation” means: (a) Radiation from cosmic sources; (b) Naturally occurring radioactive materials, including radon, except as a product of decay from source or special nuclear materials; and (c) Gl…

NAC 459.0212 “Becquerel” defined. (NRS 459.030, 459.201) “Becquerel” means a unit of measurement of radioactivity. One becquerel is that quantity of radioactive material which decays at the rate of one disintegration per second. One becquerel is equivalent to 2.7 x 10-11 curie. (…

NAC 459.0214 “Bioassay” defined. (NRS 459.201) “Bioassay” means the determination of the kinds, quantities or concentrations and, in some cases, the locations, of radioactive material in the human body, whether by direct measurement, in vivo counting or an analysis of materials e…

NAC 459.0216 “Boundary of a site” defined. (NRS 459.201) “Boundary of a site” means the boundary beyond which the land or property is not owned, leased or otherwise controlled by a licensee. (Added to NAC by Bd. of Health, eff. 1-18-94)

NAC 459.0218 “Brachytherapy source” defined. (NRS 459.201) “Brachytherapy source” has the meaning ascribed to it in 10 C.F.R. § 35.2, as adopted by reference pursuant to NAC 459.3062. (Added to NAC by Bd. of Health, eff. 11-1-95; A by R085-06, 11-13-2006)

NAC 459.022 “By-product material” defined. (NRS 459.201) “By-product material” means: 1. Any radioactive material, except special nuclear material, yielded in or made radioactive by exposure to the radiation incident to the process of producing or making use of special nuclear ma…

NAC 459.024 “Calendar quarter” defined. (NRS 459.201) “Calendar quarter” means not less than 12 consecutive weeks nor more than 14 consecutive weeks. The first calendar quarter of each year begins in January. Subsequent calendar quarters are arranged so that no day is included in…

NAC 459.0241 “Category 1 irradiator” defined. (NRS 459.201) “Category 1 irradiator” means an irradiator in which the sealed sources for the irradiation of materials are not removed from the shield of the irradiator. (Added to NAC by Bd. of Health by R149-03, eff. 12-3-2003)

NAC 459.0243 “Chemical description” defined. (NRS 459.201) “Chemical description” means a description of the principal chemical characteristics of low-level radioactive waste. (Added to NAC by Bd. of Health by R084-98, eff. 1-26-99)

NAC 459.0245 “Class” defined. (NRS 459.201) “Class” means a system of classification for inhaled radioactive material based on its rate of clearance from the pulmonary region of the lung, whereby radioactive materials are classified as either D, W or Y according to the following …

NAC 459.025 “Collective dose” defined. (NRS 459.201) “Collective dose” means the sum of the individual doses received in a given period by a specified population from exposure to a specified source of radiation. (Added to NAC by Bd. of Health, eff. 1-18-94)

NAC 459.0252 “Collimator” defined. (NRS 459.201) “Collimator” means a device used to limit the size, shape and direction of a primary radiation beam. (Added to NAC by Bd. of Health, eff. 1-21-94)

NAC 459.0254 “Committed dose equivalent” defined. (NRS 459.201) “Committed dose equivalent” means the dose equivalent to organs or tissues of reference that will be received from an intake of radioactive material by a person during the 50-year period following the intake. (Added …

NAC 459.0256 “Committed effective dose equivalent” defined. (NRS 459.201) “Committed effective dose equivalent” means the sum of the products of the weighting factors applicable to each of the organs or tissues that are irradiated and the committed dose equivalent to each of thos…

NAC 459.0258 “Consignee” defined. (NRS 459.201) “Consignee” means the designated receiver of a shipment of low-level radioactive waste. (Added to NAC by Bd. of Health by R084-98, eff. 1-26-99)

NAC 459.02585 “Consortium” defined. (NRS 459.201) “Consortium” means an association of medical use licensees and a production facility for positron emission tomography radionuclides, located at an educational institution or medical facility, which: 1. Are in the same geographical…

NAC 459.0259 “Constraint” defined. (NRS 459.201) “Constraint” means a value above which specified licensee actions are required. (Added to NAC by Bd. of Health by R085-06, eff. 11-13-2006)

NAC 459.026 “Curie” defined. (NRS 459.030, 459.201) “Curie” means a unit of measurement of radioactivity. One curie (Ci) is that quantity of radioactive material which decays at the rate of 3.7 x 1010 disintegrations per second (dps). One curie is equivalent to 37 gigabecquerels.…

NAC 459.027 “Decommission” defined. (NRS 459.030, 459.201) “Decommission” 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 of the licens…

NAC 459.0275 “Deep-dose equivalent” defined. (NRS 459.201) “Deep-dose equivalent” means the dose equivalent that is measured at a depth of 1 centimeter in a tissue of the body. (Added to NAC by Bd. of Health, eff. 1-18-94)

NAC 459.0278 “Demand respirator” defined. (NRS 459.201) “Demand respirator” means an atmosphere-supplying respirator that admits breathing air to the facepiece only when a negative pressure is created inside the facepiece by inhalation. (Added to NAC by Bd. of Health by R085-06, …

NAC 459.028 “Department of Energy” defined. (NRS 459.201) “Department of Energy” means the department established by P.L. 95-91, August 4, 1977, 91 Stat. 565, 42 U.S.C. §§ 7101 et seq., to the extent that the Department exercises functions formerly vested in the Atomic Energy Com…

NAC 459.0285 “Depleted uranium” defined. (NRS 459.201) “Depleted uranium” means source material consisting of uranium in which the isotope uranium-235 is less than 0.711 weight percent of the total uranium present. The term does not include special nuclear material as defined in …

NAC 459.029 “Derived air concentration” defined. (NRS 459.201) “Derived air concentration” means the concentration of a given radionuclide in air which, if breathed by the reference man for 2,000 hours under conditions in which the inhalation rate is 1.2 cubic meters of air per h…

NAC 459.0292 “Derived air concentration-hour” defined. (NRS 459.201) “Derived air concentration-hour” means the product of the concentration of a radionuclide in air and the time of exposure to that radionuclide, in hours. Two thousand derived air concentration-hours are equal to…

NAC 459.0294 “Discrete source” defined. (NRS 459.201) “Discrete source” means a radionuclide that is processed so that its concentration within a material is purposely increased for use in commercial, medical or research activities. (Added to NAC by Bd. of Health by R185-08, eff.…

NAC 459.0295 “Disposable respirator” defined. (NRS 459.201) “Disposable respirator” means a respirator for which maintenance is not intended and which is designed to be discarded after excessive breathing resistance, sorbent exhaustion, physical damage or its end-of-service-life …