[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR175.701]

[Page 740-741]
 
                        TITLE 49--TRANSPORTATION
 
   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY 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) The following table prescribes the minimum separation distances 
that must be maintained in a 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           distances
     of 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

[[Page 741]]


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
------------------------------------------------------------------------

    (b) When transported aboard passenger-carrying aircraft 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) Except as provided in paragraph (d) of this section, the minimum 
separation distances prescribed in paragraphs (a) and (b) 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 (a) and (b) of this 
section on the basis of the sum of the transport index numbers of the 
individual packages or overpacks.
    (d) Predesignated areas. A package 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 
(a) 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 (a) and (b) of this section for the predesignated area 
containing packages with the largest sum of transport indexes.