Pipeline and Haz. Matls. Safety Admin., DOT
Transport index or sum of
transport indexes of all packages in the aircraft or
predesignated area

Minimum separation
distances
Centimeters

40.1 to 45.0 ...........................
45.1 to 50.0 ...........................

400
425

Inches
157
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

Section 175.702

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.
Section 175.702 Separation distance requirements for packages containing
Class 7 (radioactive) materials in
cargo aircraft.
(a) No person may carry in a cargo
aircraft any package required by
Section 172.403 of this subchapter to be labeled
Radioactive Yellow-II or Radioactive
Yellow-III unless:
(1) The total transport index for all
packages does not exceed 50.0 and the
packages are carried in accordance
with Section 175.701(a); or
(2) The total transport index for all
packages exceeds 50.0; and
(i) The separation distance between
the surfaces of the radioactive materials packages, overpacks or freight
containers and any space occupied by
live animals is at least 0.5 m (20 inches)
for journeys not exceeding 24 hours and
at least 1.0 m (39 inches) for journeys
longer than 24 hours; and
(ii) The minimum separation distances between the radioactive material and any areas occupied by persons
that are specified in the following table
are maintained:

Transport index or sum of transport indexes of all packages in the aircraft or
predesignated area

Minimum separation distances
Centimeters

50.1 to 60.0 ...........................................................................................................................
60.1 to 70.0 ...........................................................................................................................
70.1 to 80.0 ...........................................................................................................................
80.1 to 90.0 ...........................................................................................................................
90.1 to 100.0 .........................................................................................................................
100.1 to 110.0 .......................................................................................................................
110.1 to 120.0 .......................................................................................................................
120.1 to 130.0 .......................................................................................................................
130.1 to 140.0 .......................................................................................................................
140.1 to 150.0 .......................................................................................................................
150.1 to 160.0 .......................................................................................................................
160.1 to 170.0 .......................................................................................................................

465
505
545
580
610
645
670
700
730
755
780
805

845

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