Page 1 of 253 State of Connecticut REGULATION of the NAME OF AGENCY: Energy and Environmental Protection Concerning SUBJECT MATTER OF REGULATION: Adoption of Sections 22a-153-1 through 22a-153-9 Inclusive of the Regulations of Connecticut State Agencies (RCSA) Ionizing Radiation Regulations The Regulations of Connecticut State Agencies are amended by adding section 22a-153-1, as follows: (NEW) Sec. 22a-153-1. General provisions for sources of ionizing radiation. (a) Definitions. For purposes of sections 22a-153-1 through 22a-153-9, the following definitions shall apply: (1) "AAPM" means American Association of Physicists in Medicine. (2) "Absorbed dose" or "D" means the mean energy imparted by ionizing radiation to matter. Absorbed dose is determined as the quotient of dE by dM, where dE is the mean energy imparted by ionizing radiation to matter of mass dM. The SI unit of absorbed dose is joule per kilogram, and the special name of the unit of absorbed dose is the gray (Gy). (3) "Accelerator-produced material" means any material made radioactive by a particle accelerator. (4) "Act" means chapter 446a of the Connecticut General Statutes. (5) "Activity" means the rate of disintegration or transformation or decay of radioactive material. The units of activity are the becquerel (Bq) and the curie (Ci). (6) "Added filtration" means any filtration that is in addition to inherent filtration. (7) “Agreement State” means any state with which the Nuclear Regulatory Commission or the Atomic Energy Commission has entered into an effective agreement under subsection 274b of the Atomic Energy Act of 1954, as amended. Page 2 of 253 (8) "Airborne radioactive material" means any radioactive material dispersed in the air in the form of dusts, fumes, particulates, mists, vapors or gases. (9) "Airborne radioactivity area" means a room, enclosure or area in which airborne radioactive materials exist in concentrations: (A) In excess of the derived air concentrations (DACs) specified in Appendix B, Table I of 22a-153-2 of these regulations; or (B) To such a degree that an individual present in the area without respiratory protective equipment could exceed, during the hours an individual is present in a week, an intake of 0.6 percent of the annual limit on intake (ALI) or 12 DAC- hours. (10) "ALARA" or "as low as is reasonably achievable" means making every reasonable effort to maintain exposures to radiation as far below the applicable dose limits as is practical, consistent with the purpose for which the registered activity is undertaken, taking into account the state of technology, the economics of improvements in relation to state of technology, the economics of improvements in relation to benefits to the public health and safety, and other societal and socioeconomic considerations, and in relation to utilization of nuclear energy and registered sources of radiation in the public interest. (11) “ANSI” means the American National Standards Institute. (12) "Authorized medical physicist" means a person who: (A) Is identified as an authorized medical physicist on a specific medical use license or equivalent permit or registration issued by the Commissioner, NRC or an Agreement State; or (B) Is identified as an authorized medical physicist on a permit or registration pursuant to a specific medical use license of broad scope issued by the Commissioner, NRC or an Agreement State. (13) "Automatic exposure control” or "AEC" means a device, including a phototimer and an ion chamber, that automatically controls one or more technique factors in order to obtain a required quantity of radiation at a preselected location or locations. (14) "Background radiation" means radiation from cosmic sources and naturally occurring radioactive materials, including radon, except as a decay product of source or special nuclear material, and including global fallout as it exists in the environment from the testing of nuclear explosive devices. Background radiation does not include sources of radiation from radioactive materials regulated by the Department. (15) "Beam axis" means the axis of rotation of the beam limiting device. Page 3 of 253 (16) "Becquerel" or "Bq" means the SI unit of activity. One becquerel is equal to 1 disintegration or transformation per second (dps or tps). (17) "Bioassay" or "radiobioassay" means the determination of 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 by analysis and evaluation of materials excreted or removed from the human body. (18) "Brachytherapy" means a method of radiation therapy in which sealed sources are utilized to deliver a radiation dose at a distance of up to a few centimeters, by surface, intracavitary, intraluminal or interstitial application. (19) "Brachytherapy source" means a radioactive source or a manufacturer-assembled source train or a combination of these sources that is designed to deliver a therapeutic dose within a distance of a few centimeters. (20) "Byproduct material" means: (A) Any radioactive material, except special nuclear material, yielded in or made radioactive by exposure to the radiation incident to the process of producing or utilizing special nuclear material; and (B) The tailings or wastes produced by the extraction or concentration of uranium or thorium from ore processed primarily for its source material content, including discrete surface wastes resulting from uranium or thorium solution extraction processes. Underground ore bodies depleted by these solution extraction operations do not constitute "byproduct material" within this definition. (21) "Calendar quarter" means not less than twelve (12) consecutive weeks nor more than fourteen (14) consecutive weeks. The first calendar quarter of each year shall begin in January and subsequent calendar quarters shall be so arranged such that no day is included in more than one calendar quarter and no day in any one year is omitted from inclusion within a calendar quarter. (22) "Calibration" means the determination of (1) the response or reading of an instrument relative to a series of known radiation values over the range of the instrument, or (2) the strength of a source of radiation relative to a standard. (23) "CFR" means Code of Federal Regulations. (24) "Collective dose" means the sum of the individual doses received in a given period of time by a specified population from exposure to a specified source of radiation. (25) "Collimator" means a radiation shield that is placed on the end of the guide tube or directly onto a radiographic exposure device to restrict the size of the radiation beam when the sealed source is cranked into position to make a radiographic exposure. Page 4 of 253 (26) "Commissioner" means the Commissioner of the Connecticut Department of Energy and Environmental Protection, or any member of the Department or any local air pollution control official or agency authorized by the Commissioner, acting singly or jointly, to whom the Commissioner assigns any functions arising under the provisions of these regulations. (27) "Committed dose equivalent" or "HT,50" means the dose equivalent to organs or tissues of reference (T) that will be received from an intake of radioactive material by an individual during the fifty (50) year period following the intake. (28) "Committed effective dose equivalent" or "HE, 50" is the sum of the products of the weighting factors (wT) applicable to each of the body organs or tissues that are irradiated and the committed dose equivalent to each of these organs or tissues (HE,50 = Σw T HT,50). (29) "Control panel" means that part of the x-ray control upon which are mounted the switches, knobs, pushbuttons and other hardware necessary for manually setting the technique factors. (30) "Curie" or "Ci" means a unit of quantity of activity. One curie is that quantity of radioactive material which decays at the rate of 3.7E+10 disintegrations or transformations per second (dps or tps). (31) "Deep dose equivalent" or "Hd", when applied to external whole body exposure, means the dose equivalent at a tissue depth of one centimeter (1000 mg/cm2). (32) "Department" means the Connecticut Department of Energy and Environmental Protection. (33) "Department of Energy" means the Department of Energy established by Public Law 95- 91, August 4, 1977, 42 U.S.C. 7101 et seq., to the extent that the Department exercises functions formerly vested in the Atomic Energy Commission, its Chairman, members, officers and components and transferred to the 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 (Public Law 93-438, October 11, 1974, 42 U.S.C. 5814, effective January 19, 1975) and re-transferred to the Secretary of Energy pursuant to section 301(a) of the Department of Energy Organization Act (Public Law 95-91, August 4, 1977, 42 U.S.C. 7151, effective October 1, 1977.) (34) "Depleted uranium" or "DU" means the source material uranium in which the isotope uranium-235 is less than 0.711 weight percent of the total uranium present. “Depleted uranium” does not include special nuclear material. (35) "Dose" or "radiation dose" means absorbed dose, dose equivalent, effective dose equivalent, committed dose equivalent, committed effective dose equivalent, total organ dose equivalent or total effective dose equivalent. Page 5 of 253 (36) "Dose equivalent" or "HT" means the product of the absorbed dose in tissue, quality factor and all other necessary modifying factors at the location of interest. The units of dose equivalent are the sievert (Sv) and rem. (37) "Dose limits" or "limits" means the permissible upper bounds of radiation doses established in accordance with these regulations. (38) "Effective dose equivalent" or "HE" means the sum of the products of the dose equivalent to each organ or tissue (HT) and the weighting factor (wT) applicable to each of the body organs or tissues that are irradiated (HE = Σ wTHT).