CHAPTER 459 - HAZARDOUS MATERIALS

NAC 459.572 Fluoroscopic X-ray systems: Barrier-rate limits. (NRS 459.201) 1. The exposure rate resulting from transmission through the primary protective barrier with the attenuation block in the useful beam, combined with radiation from the image intensifier, if provided, must …

NAC 459.574 Fluoroscopic X-ray systems: Indication of potential and current; source-skin distance; exceptions for fluoroscopy imaging system. (NRS 459.030, 459.201) 1. During fluoroscopy and cinefluorography, X-ray tube potential and current must be continuously indicated. 2. Exc…

NAC 459.576 Fluoroscopic X-ray systems: Fluoroscopic timer; mobile fluoroscopes. (NRS 459.201) 1. A means must be provided to preset the cumulative on-time of the fluoroscopic tube. The maximum cumulative time of the timing device must not exceed 5 minutes without resetting. 2. A…

NAC 459.578 Fluoroscopic X-ray systems: Control of scattered radiation. (NRS 459.201) 1. Fluoroscopic table designs when combined with procedures utilized, must be such that no unprotected part of any staff or ancillary person’s body will be exposed to unattenuated scattered radi…

NAC 459.580 Intraoral dental radiographic systems. (NRS 439.200, 459.201) 1. In addition to the provisions of NAC 459.552 to 459.558, inclusive, and 459.564, these requirements apply to X-ray equipment and associated facilities used for dental radiography. The criteria for extrao…

NAC 459.581 Registration of electronic brachytherapy systems or additional therapeutic X-ray systems. (NRS 459.201) 1. Except as otherwise provided in subsection 4, each person who acquires an electronic brachytherapy system or an additional therapeutic X-ray system shall apply t…

NAC 459.582 Therapeutic X-ray systems: Leakage radiation; diaphragms and beam-limiting devices. (NRS 459.201) 1. When the tube is operated at its leakage technique factors, the leakage radiation must not exceed the value specified at the distance specified for the classification …

NAC 459.584 Therapeutic X-ray systems: Filter systems, tube housing. (NRS 459.201) 1. The filter system must be designed so that: (a) Filters cannot be accidentally displaced from the useful beam at any possible tube orientation. (b) Each filter is marked as to its material of co…

NAC 459.586 Therapeutic X-ray systems: Beam monitor. (NRS 459.201) Equipment installed after February 28, 1980, of greater than 150 kVp must be provided with a beam monitor system as follows: 1. It must include a transmission detector which is a full beam detector and which is pl…

NAC 459.588 Therapeutic X-ray systems: Timer; control panel. (NRS 459.201) 1. A timer must be provided which has a display at the treatment control panel. The timer must have a preset timer selector and an elapsed time indicator. 2. The timer must be a cumulative timer which swit…

NAC 459.590 Therapeutic X-ray systems: Requirements for design of treatment room. (NRS 459.201) In addition to providing shielding adequate to meet the requirements of NAC 459.320 to 459.374, inclusive, the design of the treatment room must meet the following requirements: 1. Tre…

NAC 459.592 Therapeutic X-ray systems: Surveys; calibration; operating procedures. (NRS 439.200, 459.201) 1. All new facilities and existing facilities not previously surveyed must have a radiation protection survey made by, or under the direction of, a qualified expert. This sur…

NAC 459.5921 Therapeutic X-ray systems: Submission of certain information to Division before installation of certain devices. (NRS 459.201) 1. Before a facility may install a new therapeutic X-ray device, or installs a therapeutic X-ray device with a higher energy output into an …

NAC 459.5922 Therapeutic X-ray systems: Requirements for authorized users. (NRS 459.201) 1. A registrant for any therapeutic X-ray device shall require an authorized user to: (a) Be an authorized user of radioactive sources for electronic brachytherapy pursuant to the radioactive…

NAC 459.5923 Therapeutic X-ray systems: Requirements for authorized medical physicist for electronic brachytherapy. (NRS 459.201) 1. A registrant for any therapeutic X-ray device shall require an authorized medical physicist for electronic brachytherapy to: (a) Be currently licen…

NAC 459.5924 Therapeutic X-ray systems: Qualifications and duties of radiation safety officers. (NRS 459.201) 1. A registrant for any therapeutic X-ray system shall appoint a radiation safety officer and require the radiation safety officer to: (a) Have completed specific trainin…

NAC 459.5925 Therapeutic X-ray systems: Requirements for persons who are not authorized users. (NRS 459.201) 1. A registrant for any therapeutic X-ray system shall require a person who is not an authorized user to: (a) Operate the therapeutic X-ray system solely under the direct …

NAC 459.5926 Therapeutic X-ray systems: Requirements for use; posting of certain procedures; duties of registrants. (NRS 459.201) 1. A therapeutic X-ray system must not be used for the irradiation of patients unless the facility complies with the criteria of the United States Foo…

NAC 459.5927 Therapeutic X-ray systems: Radiation protection survey; portable monitoring equipment. (NRS 459.201) 1. The registrant shall perform, or cause to be performed, a radiation protection survey on each new facility or any existing facility which has not been previously s…

NAC 459.593 Electronic brachytherapy devices: Requirements for installation, maintenance, adjustment, service or repair. (NRS 459.201) 1. Only a manufacturer’s representative who is registered as a service provider with the State may install the electronic brachytherapy device if…

NAC 459.5931 Electronic brachytherapy devices: Fees. (NRS 439.150, 459.201) 1. A registrant shall pay an annual fee for the registration and inspection of an electronic brachytherapy device in the amount of $4,400. 2. The registration fee is due within 30 days after the acquisiti…

NAC 459.5932 Electronic brachytherapy devices: Validation of output; calibration. (NRS 459.201) 1. An authorized medical physicist for electronic brachytherapy shall validate the output of an electronic brachytherapy system. 2. Measurements for calibration must be made: (a) For e…

NAC 459.5933 Electronic brachytherapy devices: Calibration of dosimetry system. (NRS 459.201) 1. For an electronic brachytherapy system, calibration of the dosimetry system must include the source and energy in use and must use an established protocol such as the TG-21 protocol e…

NAC 459.5934 Electronic brachytherapy devices: Spot checks. (NRS 459.201) 1. A registrant shall ensure that a program is in place to perform spot checks on each electronic brachytherapy system: (a) At the beginning of each day during which the system will be used; (b) Each time t…

NAC 459.5935 Electronic brachytherapy devices: Requirements for mobile electronic brachytherapy. (NRS 459.201) A registrant who provides services for mobile electronic brachytherapy shall: 1. Check all survey instruments before medical use at each location of use or on each day o…

NAC 459.5936 Electronic brachytherapy devices: Acceptance test; comparison of position indicators; evaluation and approval of parameters for treatment. (NRS 459.201) 1. Where applicable, an authorized medical physicist for electronic brachytherapy shall perform an acceptance test…

NAC 459.5937 Electronic brachytherapy devices: Quality assurance program. (NRS 459.201) 1. A facility which uses an electronic brachytherapy system must develop and implement a quality assurance program in compliance with the approval of the system by the United States Food and D…

NAC 459.594 X-ray and electron therapy installations: General requirements. (NRS 459.201) All of the provisions of NAC 459.740 to 459.752, inclusive, except subsections 3 and 4 of NAC 459.750, apply to medical facilities using medical therapy equipment with energies 1 MeV and abo…

NAC 459.596 X-ray and electron therapy installations: Leakage radiation; beam-limiting devices. (NRS 459.201) 1. For existing equipment and new equipment manufactured or installed after February 28, 1980: (a) The leakage radiation, excluding neutrons, at a distance of 1 meter fro…

NAC 459.598 X-ray and electron therapy installations: Filters; beam monitors. (NRS 459.201) 1. In equipment which uses a system of wedge filters, interchangeable field flattening filters or beam scattering filters: (a) Irradiation must not be possible until a selection of filter …

NAC 459.600 X-ray and electron therapy installations: Dose monitors. (NRS 459.201) 1. Irradiation must not be possible until a selection of a number of dose monitor units has been made at the treatment control panel. 2. After useful beam termination, it must be necessary to reset…

NAC 459.602 X-ray and electron therapy installations: Switches; timers. (NRS 459.201) 1. It must be possible to terminate irradiation and equipment movements or to go from an interruption condition to termination conditions at any time from the treatment control panel. 2. It must…

NAC 459.604 X-ray and electron therapy installations: Selections of radiation type, energy, and stationary or moving beam. (NRS 459.201) 1. In equipment capable of both X-ray therapy and electron therapy: (a) Irradiation must not be possible until a selection of radiation types, …

NAC 459.606 X-ray and electron therapy installations: Focal spot; beam orientation; system checks. (NRS 459.201) 1. The registrant must determine or obtain from the manufacturer the location with reference to an accessible point on the radiation head of: (a) The X-ray target and …

NAC 459.608 X-ray and electron therapy installations: Shielding requirements. (NRS 459.201) Shielding must be adequate to meet the requirements of NAC 459.320 to 459.374, inclusive. In addition, each of the following design requirements apply: 1. Except for entrance doors, all th…

NAC 459.610 X-ray and electron therapy installations: Surveys; operating procedure; calibration. (NRS 459.201) 1. All new facilities and existing facilities not previously surveyed must have a survey of radiation protection made by, or under the direction of, a qualified expert. …

NAC 459.612 X-ray and electron therapy installations: Spot checks. (NRS 459.201) 1. A spot check must be made daily with use and include carefully selected representative or indicative measurements which will demonstrate the consistency of relevant machine operating characteristi…

NAC 459.614 Veterinary medicine radiographic installations. (NRS 459.201) 1. The protective tube housing must be of the diagnostic type. 2. Diaphragms or cones must be provided for collimating the useful beam to the area of clinical interest and must provide the same degree of pr…

NAC 459.616 Other radiographic systems: Beam limitation. (NRS 459.201) The useful beam must be limited to the area of clinical interest. [Bd. of Health, Radiation Control Reg. §§ 6.6 & 6.6.1, eff. 2-28-80]

NAC 459.618 General purpose X-ray systems: Stationary and mobile. (NRS 459.201) 1. A means must be provided for stepless adjustment of the size of the X-ray field. 2. A means must be provided for visually defining the perimeter of the X-ray field. The total misalignment of the ed…

NAC 459.620 Other radiographic systems: Special purpose systems. (NRS 459.201) For special purpose X-ray systems: 1. A means must be provided to limit the X-ray field in the plane of the image receptor so that the X-ray field is within 2 percent of the source-image receptor dista…

NAC 459.622 Devices to control exposures. (NRS 459.201) 1. A means must be provided to terminate the exposure at a preset time interval, preset product of current and time, a preset number of pulses or a preset radiation exposure to the image receptor. In addition: (a) Terminatio…

NAC 459.624 Other radiographic systems: Source to skin distance; exposure reproducibility; standby radiation. (NRS 459.201) 1. Except as otherwise provided in NAC 459.5595, all mobile or portable radiographic systems must be provided with a means to limit the source to skin dista…

NAC 459.640 Definitions. As used in NAC 459.640 to 459.664, inclusive, unless the context otherwise requires, the words and terms defined in NAC 459.642 to 459.654, inclusive, have the meanings ascribed to them in those sections. (Supplied in codification)

NAC 459.642 “Analytical X-ray equipment” defined. (NRS 459.201) “Analytical X-ray equipment” means equipment used for X-ray diffraction or fluorescence analysis. [Bd. of Health, Radiation Control Reg. § 8.2.1, eff. 2-28-80]

NAC 459.644 “Analytical X-ray system” defined. (NRS 459.201) “Analytical X-ray system” means a group of local and remote components utilizing X-rays to determine the elemental composition or to examine the microstructure of materials. [Bd. of Health, Radiation Control Reg. § 8.2.…

NAC 459.646 “Fail-safe characteristics” defined. (NRS 459.201) “Fail-safe characteristics” means design features which cause beam port shutters to close or which otherwise prevent emergence of the primary beam upon the failure of a safety or warning device. [Bd. of Health, Radiat…