[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR175.701] [Page 701-702] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 175_CARRIAGE BY AIRCRAFT--Table of Contents Subpart C_Specific Regulations Applicable According to Classification of Material Sec. 175.701 Separation distance requirements for packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) General. No person may carry in a passenger-carrying aircraft any package required by Sec. 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: ------------------------------------------------------------------------ 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 12 1.1 to 2.0..................................... 50 20 2.1 to 3.0..................................... 70 28 3.1 to 4.0..................................... 85 34 4.1 to 5.0..................................... 100 40 5.1 to 6.0..................................... 115 46 6.1 to 7.0..................................... 130 52 7.1 to 8.0..................................... 145 57 8.1 to 9.0..................................... 155 61 9.1 to 10.0.................................... 165 65 10.1 to 11.0................................... 175 69 11.1 to 12.0................................... 185 73 12.1 to 13.0................................... 195 77 13.1 to 14.0................................... 205 81 14.1 to 15.0................................... 215 85 15.1 to 16.0................................... 225 89 16.1 to 17.0................................... 235 93 17.1 to 18.0................................... 245 97 18.1 to 20.0................................... 260 102 20.1 to 25.0................................... 290 114 25.1 to 30.0................................... 320 126 30.1 to 35.0................................... 350 138 35.1 to 40.0................................... 375 148 40.1 to 45.0................................... 400 157 45.1 to 50.0................................... 425 167 ------------------------------------------------------------------------ (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 Sec. 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 [[Page 702]] 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]