CHAPTER 459 - HAZARDOUS MATERIALS

NAC 459.3645 Records of surveys and calibrations. (NRS 459.201) 1. Each licensee and registrant shall maintain records showing the results of surveys and calibrations required pursuant to NAC 459.337 and 459.3585. Except as otherwise provided in subsection 3 of NAC 459.337, the l…

NAC 459.365 Records of prior occupational doses. (NRS 459.201) 1. For each person who is likely to receive, in 1 year, an occupational dose requiring monitoring pursuant to NAC 459.339, the licensee or registrant shall: (a) Determine the occupational dose received by that person …

NAC 459.3655 Records of planned special exposures. (NRS 459.201) 1. For each planned special exposure authorized by a licensee or registrant pursuant to NAC 459.329, that licensee or registrant shall maintain records that describe: (a) The exceptional circumstances requiring the …

NAC 459.3665 Records of results from individual monitoring. (NRS 459.030, 459.201) 1. Each licensee and registrant shall maintain records of doses received by all persons for whom monitoring is required pursuant to NAC 459.339, and records of doses received by persons during plan…

NAC 459.367 Records of dose to individual members of public. (NRS 459.201) 1. Each licensee and registrant shall maintain records sufficient to demonstrate compliance with the limits specified in NAC 459.335 for members of the public. 2. The licensee or registrant shall retain th…

NAC 459.3673 Records of disposal of waste. (NRS 459.201) Each licensee shall maintain records of the disposal of licensed radioactive materials made pursuant to the provisions of NAC 459.010 to 459.950, inclusive, including any burial authorized before April 27, 1984. The license…

NAC 459.3675 Records of tests on entry control devices for very high radiation areas. (NRS 459.201) 1. Each licensee and registrant shall maintain records of tests made pursuant to NAC 459.345 on entry control devices for very high radiation areas. These records must include the …

NAC 459.368 Notice and reports to persons exposed to radiation or radioactive material. (NRS 459.070, 459.201) 1. Requirements for notification and reports to persons of exposure to radiation or radioactive material are specified in NAC 459.786. 2. When a licensee or registrant i…

NAC 459.369 Requirements for report of lost, stolen or missing licensed radioactive material or radiation machines. (NRS 459.201) 1. Each licensee and registrant shall report to the Division by telephone: (a) Any lost, stolen or missing licensed radioactive material in an aggrega…

NAC 459.3695 Report of certain incidents. (NRS 459.030, 459.070, 459.201) 1. Each licensee and registrant shall immediately report to the Division each event involving a source of radiation possessed by the licensee or registrant that may have caused, or threatens to cause: (a) A…

NAC 459.371 Submission of written reports for certain occurrences; contents of reports. (NRS 459.030, 459.070, 459.201) 1. In addition to the notification required by NAC 459.3695, each licensee and registrant shall submit a written report to the Division within 30 days after lea…

NAC 459.3715 Submission of written reports after planned special exposures. (NRS 459.201) Each licensee and registrant shall submit a written report to the Division within 30 days following any planned special exposure conducted in accordance with NAC 459.329 informing the Divisi…

NAC 459.373 Additional reporting requirements. (NRS 459.201) In addition to complying with any other reporting requirements specified in NAC 459.010 to 459.950, inclusive, a licensee shall comply with the following reporting requirements: 1. Each licensee shall notify the Divisio…

NAC 459.374 Notice of intent to vacate premises. (NRS 459.201) Each specific licensee must, no less than 30 days before vacating or relinquishing possession or control of premises which may have been contaminated with radioactive material as a result of his or her activities, not…

NAC 459.3801 Restricted area: Release for unrestricted use. (NRS 459.201) A restricted area in which a licensee has used or stored radioactive material must not be released for unrestricted use until the Division has given its approval in writing. (Added to NAC by Bd. of Health, …

NAC 459.3805 Restricted area: Persons authorized to enter. (NRS 459.201) Only those persons who perform work in a restricted area are authorized to enter such areas. A licensee shall not allow any other person to enter a restricted area. (Added to NAC by Bd. of Health, eff. 11-1-…

NAC 459.400 Definitions. As used in NAC 459.400 to 459.624, inclusive, unless the context otherwise requires, the words and terms defined in NAC 459.402 to 459.546, inclusive, have the meanings ascribed to them in those sections. (Supplied in codification; A by Bd. of Health by R…

NAC 459.402 “Accessible surface” defined. (NRS 459.201) “Accessible surface” means the external surface of the enclosure or housing provided by the manufacturer. [Bd. of Health, Radiation Control Reg. § 6.2.1, eff. 2-28-80]

NAC 459.404 “Added filtration” defined. (NRS 459.201) “Added filtration” means any filtration added to the inherent filtration. [Bd. of Health, Radiation Control Reg. § 6.2.2, eff. 2-28-80]—(NAC A 4-27-84)

NAC 459.406 “Aluminum equivalent” defined. (NRS 459.201) “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy) affording the same attenuation, under specified conditions, as the material in question. The nominal chemical composition of type 1100 aluminum alloy i…

NAC 459.408 “Attenuation block” defined. (NRS 459.201) “Attenuation block” means a block or stack having the dimensions 20 cm by 20 cm by 3.8 cm, of type 1100 aluminum alloy or other materials having equivalent attenuation. [Bd. of Health, Radiation Control Reg. § 6.2.4, eff. 2-2…

NAC 459.410 “Automatic exposure control” defined. (NRS 459.201) “Automatic exposure control” means a device which automatically controls one or more technique factors in order to obtain at a preselected location a required quantity of radiation. [Bd. of Health, Radiation Control …

NAC 459.412 “Beam axis” defined. (NRS 459.201) “Beam axis” means a line from the source through the centers of the X-ray fields. [Bd. of Health, Radiation Control Reg. § 6.2.6, eff. 2-28-80]

NAC 459.414 “Beam-limiting device” defined. (NRS 459.201) “Beam-limiting device” means a device which provides a means to restrict the dimensions of the X-ray field. [Bd. of Health, Radiation Control Reg. § 6.2.7, eff. 2-28-80]

NAC 459.416 “Changeable filters” defined. (NRS 459.201) “Changeable filters” means any filter, exclusive of inherent filtration, which can be removed from the useful beam through any electronic, mechanical or physical process. [Bd. of Health, Radiation Control Reg. § 6.2.8, eff. …

NAC 459.418 “Coefficient of variation” defined. (NRS 459.201) “Coefficient of variation,” abbreviated as “C,” means the ratio of the standard deviation to the mean value of a population of observations. It is estimated using the following equation: C (Coefficient of Variation) = …

NAC 459.420 “Contact therapy system” defined. (NRS 459.201) “Contact therapy system” means a system in which an X-ray tube port is put in contact with or within 5 centimeters of the surface being treated. [Bd. of Health, Radiation Control Reg. § 6.2.10, eff. 2-28-80]

NAC 459.422 “Control panel” defined. (NRS 459.201) “Control panel” means that part of the X-ray control where the switches, knobs, pushbuttons and other hardware are mounted which are necessary for manually setting the technique factors. [Bd. of Health, Radiation Control Reg. § 6…

NAC 459.424 “Cooling curve” defined. (NRS 459.201) “Cooling curve” means the graphical relationship between heat units stored and cooling time. [Bd. of Health, Radiation Control Reg. § 6.2.12, eff. 2-28-80]

NAC 459.426 “Dead-man switch” defined. (NRS 459.201) “Dead-man switch” means a switch constructed so that a circuit closing contact can be maintained only by continuous pressure on the switch by the operator. [Bd. of Health, Radiation Control Reg. § 6.2.13, eff. 2-28-80]

NAC 459.428 “Diagnostic source assembly” defined. (NRS 459.201) “Diagnostic source assembly” means the tube housing assembly with a beam-limiting device attached. [Bd. of Health, Radiation Control Reg. § 6.2.14, eff. 2-28-80]

NAC 459.430 “Diagnostic-type protective tube housing” defined. (NRS 459.201) “Diagnostic-type protective tube housing” means a tube housing so constructed that the leakage radiation measured at a distance of 1 meter from the source does not exceed 100 mr in 1 hour when the tube i…

NAC 459.432 “Diagnostic X-ray system” defined. (NRS 459.201) “Diagnostic X-ray system” means an X-ray system designed for irradiation of any part of the human body for diagnosis or visualization. [Bd. of Health, Radiation Control Reg. § 6.2.16, eff. 2-28-80]

NAC 459.434 “Direct scattered radiation” defined. (NRS 459.201) “Direct scattered radiation” means scattered radiation which has been deviated in direction only by materials irradiated by the useful beam. [Bd. of Health, Radiation Control Reg. § 6.2.17, eff. 2-28-80]

NAC 459.436 “Entrance exposure rate” defined. (NRS 459.201) “Entrance exposure rate” means the roentgens per unit of time at the point where the center of the useful beam enters the patient. [Bd. of Health, Radiation Control Reg. § 6.2.18, eff. 2-28-80]

NAC 459.440 “Field emission equipment” defined. (NRS 459.201) “Field emission equipment” means equipment which uses an X-ray tube in which electron emission from the cathode is due solely to the action of an electric field. [Bd. of Health, Radiation Control Reg. § 6.2.20, eff. 2-…

NAC 459.442 “Filter” defined. (NRS 459.201) “Filter” means material placed in the useful beam to absorb preferentially selected radiations. [Bd. of Health, Radiation Control Reg. § 6.2.21, eff. 2-28-80]—(NAC A 4-27-84)

NAC 459.444 “Fluoroscopic imaging assembly” defined. (NRS 459.201) “Fluoroscopic imaging assembly” means a component which comprises a reception system in which X-ray photons produce a fluoroscopic image. It includes equipment housings, electrical interlocks, if any, the primary …

NAC 459.446 “General purpose radiographic X-ray system” defined. (NRS 459.201) “General purpose radiographic X-ray system” means any radiographic X-ray system which by design is not limited to radiographic examination of specific anatomical regions. [Bd. of Health, Radiation Cont…

NAC 459.450 “Half-value layer” defined. (NRS 459.201) “Half-value layer,” abbreviated as “HVL,” means the thickness of specified material which attenuates the beam of radiation to an extent that the exposure rate is reduced to one-half of its original value. In this definition th…

NAC 459.452 “Image intensifier” defined. (NRS 459.201) “Image intensifier” means a device, including housing, which instantaneously converts an X-ray pattern into a corresponding light image of higher energy density. [Bd. of Health, Radiation Control Reg. § 6.2.26, eff. 2-28-80]

NAC 459.454 “Image receptor” defined. (NRS 459.201) “Image receptor” means any device, such as a fluorescent screen or radiographic film, which transforms incident X-ray photons either into a visible image or into another form which can be made into a visible image by further tra…

NAC 459.456 “Inherent filtration” defined. (NRS 459.201) “Inherent filtration” means the filtration permanently in the useful beam; it includes the window of the X-ray tube and any permanent tube or source enclosure. [Bd. of Health, Radiation Control Reg. § 6.2.28, eff. 2-28-80]

NAC 459.458 “Kilowatt second” defined. (NRS 459.201) “Kilowatt second,” abbreviated as “kWs,” is equal to the product of peak kilovolts, amperes and seconds or (1000) (kV) (mA) (sec). [Bd. of Health, Radiation Control Reg. § 6.2.29, eff. 2-28-80]

NAC 459.460 “Lead equivalent” defined. (NRS 459.201) “Lead equivalent” means the thickness of lead affording the same attenuation, under specified conditions, as the material in question. [Bd. of Health, Radiation Control Reg. § 6.2.30, eff. 2-28-80]

NAC 459.462 “Leakage radiation” defined. (NRS 459.201) “Leakage radiation” means radiation emanating from the diagnostic or therapeutic source assembly except for: 1. The useful beam; and 2. Radiation produced when the exposure switch or timer is not activated. [Bd. of Health, Ra…

NAC 459.464 “Leakage technique factors” defined. (NRS 459.201) “Leakage technique factors” means the technique factors associated with the tube housing assembly which are used in measuring leakage radiation. They are defined as follows: 1. For capacitor energy storage equipment, …