49 C.F.R. § 175.701 Separation distance requirements for packages containing Class 7 (radioactive) materials in passenger-carrying aircraft.
Title 49 - Transportation
(a) General. No person may carry in a passenger-carrying aircraft any package required by §172.403 of this subchapter to be labeled Radioactive Yellow-II, or Radioactive Yellow-III unless the package is placed in the aircraft in accordance with the minimum separation distances prescribed in paragraph (b) or (c) of this section. (b) Separation distances. (1) Except as provided in paragraph (c) of this section, the minimum separation distances prescribed in paragraphs (b)(2) and (b)(3) of this section are determined by measuring the shortest distance between the surfaces of the Class 7 (radioactive) materials package and the surfaces bounding the space occupied by passengers or animals. If more than one package of Class 7 (radioactive) materials is placed in a passenger-carrying aircraft, the minimum separation distance for these packages shall be determined in accordance with paragraphs (b)(2) and (b)(3) of this section on the basis of the sum of the transport index numbers of the individual packages or overpacks. (2) The following table prescribes minimum separation distances that must be maintained in passenger-carrying aircraft between Class 7 (radioactive) materials labeled Radioactive Yellow-II or Radioactive Yellow-III and passengers and crew: (3) Class 7 (radioactive) materials in packages, overpacks or freight containers labeled Radioactive Yellow-II or Radioactive Yellow-III must be separated from live animals by a distance of at least 0.5 m (20 inches) for journeys not exceeding 24 hours, and by a distance of at least 1.0 m (39 inches) for journeys longer than 24 hours. (c) Predesignated areas. A package required by §172.403 of this subchapter to be labeled Radioactive Yellow-II or Radioactive Yellow-III may be carried in a passenger-carrying aircraft in accordance with a system of predesignated areas established by the aircraft operator. Each aircraft operator that elects to use a system of predesignated areas shall submit a detailed description of the proposed system to the Associate Administrator for approval prior to implementation of the system. A proposed system of predesignated areas is approved if the Associate Administrator determines that it is designed to assure that: (1) The packages can be placed in each predesignated area in accordance with the minimum separation distances prescribed in paragraph (b)(2) of this section; and (2) The predesignated areas are separated from each other by minimum distance equal to at least four times the distances required by paragraphs (b)(1) and (b)(2) of this section for the predesignated area containing packages with the largest sum of transport indexes. [Amdt. 175–13, 45 FR 20102, Mar. 27, 1980, as amended by Amdt. 175–23, 47 FR 43066, Sept. 30, 1982; Amdt. 175–25, 47 FR 54824, Dec. 6, 1982; Amdt. 175–47, 55 FR 52687, Dec. 21, 1990; 56 FR 66281, Dec. 20, 1991; Amdt. 175–49, 58 FR 50494, Sept. 27, 1993; 66 FR 45383, Aug. 28, 2001]
Title 49: Transportation
PART 175—CARRIAGE BY AIRCRAFT
Subpart C—Specific Regulations Applicable According to Classification of Material
§ 175.701 Separation distance requirements for packages containing Class 7 (radioactive) materials in passenger-carrying aircraft.
------------------------------------------------------------------------ Minimum separation Transport index or sum of transport indexes of distances all packages in the aircraft or predesignated ------------------------ area Centimeters Inches------------------------------------------------------------------------0.1 to 1.0..................................... 30 121.1 to 2.0..................................... 50 202.1 to 3.0..................................... 70 283.1 to 4.0..................................... 85 344.1 to 5.0..................................... 100 405.1 to 6.0..................................... 115 466.1 to 7.0..................................... 130 527.1 to 8.0..................................... 145 578.1 to 9.0..................................... 155 619.1 to 10.0.................................... 165 6510.1 to 11.0................................... 175 6911.1 to 12.0................................... 185 7312.1 to 13.0................................... 195 7713.1 to 14.0................................... 205 8114.1 to 15.0................................... 215 8515.1 to 16.0................................... 225 8916.1 to 17.0................................... 235 9317.1 to 18.0................................... 245 9718.1 to 20.0................................... 260 10220.1 to 25.0................................... 290 11425.1 to 30.0................................... 320 12630.1 to 35.0................................... 350 13835.1 to 40.0................................... 375 14840.1 to 45.0................................... 400 15745.1 to 50.0................................... 425 167------------------------------------------------------------------------
