845 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 175.702 

Transport index or sum of 

transport indexes of all pack-

ages in the aircraft or 

predesignated area 

Minimum separation 

distances 

Centimeters Inches 

40.1 to 45.0 ...........................

400 

157 

45.1 to 50.0 ...........................

425 

167 

(b) When transported aboard pas-

senger-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 sepa-
ration distances prescribed in para-
graphs (a) and (b) of this section are de-
termined by measuring the shortest 
distance between the surfaces of the 
Class 7 (radioactive) materials package 
and the surfaces bounding the space oc-
cupied by passengers or animals. If 
more than one package of Class 7 (ra-
dioactive) materials is placed in a pas-
senger-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 pack-
ages or overpacks. 

(d) 

Predesignated areas. 

A package la-

beled 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 oper-
ator that elects to use a system of 
predesignated areas shall submit a de-
tailed description of the proposed sys-
tem 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 dis-
tances prescribed in paragraph (a) of 
this section; and 

(2) The predesignated areas are sepa-

rated from each other by minimum dis-
tance equal to at least four times the 
distances required by paragraphs (a) 
and (b) of this section for the 
predesignated area containing pack-
ages with the largest sum of transport 
indexes. 

§ 175.702

Separation distance require-

ments for packages containing 
Class 7 (radioactive) materials in 
cargo aircraft. 

(a) No person may carry in a cargo 

aircraft any package required by 
§ 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 § 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 mate-
rials 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 dis-

tances between the radioactive mate-
rial 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 Inches 

50.1 to 60.0 ...........................................................................................................................

465 183 

60.1 to 70.0 ...........................................................................................................................

505 199 

70.1 to 80.0 ...........................................................................................................................

545 215 

80.1 to 90.0 ...........................................................................................................................

580 228 

90.1 to 100.0 .........................................................................................................................

610 240 

100.1 to 110.0 .......................................................................................................................

645 254 

110.1 to 120.0 .......................................................................................................................

670 264 

120.1 to 130.0 .......................................................................................................................

700 276 

130.1 to 140.0 .......................................................................................................................

730 287 

140.1 to 150.0 .......................................................................................................................

755 297 

150.1 to 160.0 .......................................................................................................................

780 307 

160.1 to 170.0 .......................................................................................................................

805 317 

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