846 

49 CFR Ch. I (10–1–18 Edition) 

§ 175.703 

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

predesignated area 

Minimum separation distances 

Centimeters Inches 

170.1 to 180.0 .......................................................................................................................

830 327 

180.1 to 190.0 .......................................................................................................................

855 337 

190.1 to 200.0 .......................................................................................................................

875 344 

(b) In addition to the limits on com-

bined criticality safety indexes stated 
in § 175.700(b), 

(1) The criticality safety index of any 

single group of packages must not ex-
ceed 50.0 (as used in this section, the 
term ‘‘group of packages’’ means pack-
ages that are separated from each 
other in an aircraft by a distance of 6 
m (20 feet) or less); and 

(2) Each group of packages must be 

separated from every other group in 
the aircraft by not less than 6 m (20 
feet), measured from the outer surface 
of each group. 

[71 FR 14604, Mar. 22, 2006, as amended at 71 
FR 54396, Sept. 14, 2006; 77 FR 60943, Oct. 5, 
2012; 79 FR 40618, July 11, 2014] 

§ 175.703

Other special requirements 

for the acceptance and carriage of 
packages containing Class 7 mate-
rials. 

(a) No person may accept for carriage 

in an aircraft packages of Class 7 mate-
rials, other than limited quantities, 
contained in a rigid or non-rigid over-
pack, including a fiberboard box or 
plastic bag, unless they have been pre-
pared for shipment in accordance with 
§ 172.403(h) of this subchapter. 

(b) Each shipment of fissile material 

packages must conform to the require-
ments of §§ 173.457 and 173.459 of this 
subchapter. 

(c) No person shall offer or accept for 

transportation, or transport, by air— 

(1) Vented Type B(M) packages, pack-

ages which require external cooling by 
an ancillary cooling system or pack-
ages subject to operational controls 
during transport; or 

(2) Liquid pyrophoric Class 7 (radio-

active) materials. 

(d) Packages with radiation levels at 

the package surface or a transport 
index in excess of the limits specified 
in § 173.441(a) of this subchapter may 
not be transported by aircraft except 
under special arrangements approved 
by the Associate Administrator. 

§ 175.704

Plutonium shipments. 

Shipments of plutonium which are 

subject to 10 CFR 71.88(a)(4) must com-
ply with the following: 

(a) Each package containing pluto-

nium must be secured and restrained to 
prevent shifting under normal condi-
tions. 

(b) A package of plutonium having a 

gross mass less than 40 kg (88 pounds) 
and both its height and diameter less 
than 50 cm (19.7 inches)— 

(1) May not be transported aboard an 

aircraft carrying other cargo required 
to bear a Division 1.1 label; and 

(2) Must be stowed aboard the air-

craft on the main deck or the lower 
cargo compartment in the aft-most lo-
cation that is possible for cargo of its 
size and weight, and no other cargo 
may be stowed aft of packages con-
taining plutonium. 

(c) A package of plutonium exceeding 

the size and weight limitations in para-
graph (b) of this section— 

(1) May not be transported aboard an 

aircraft carrying other cargo required 
to bear any of the following labels: 
Class 1 (all Divisions), Class 2 (all Divi-
sions), Class 3, Class 4 (all Divisions), 
Class 5 (all Divisions), or Class 8; and 

(2) Must be securely cradled and tied 

down to the main deck of the aircraft 
in a manner that restrains the package 
against the following internal forces 
acting separately relative to the deck 
of the aircraft; Upward, 2g; Forward, 
9g; Sideward, 1.5g; Downward, 4.5g. 

§ 175.705

Radioactive contamination. 

(a) A carrier shall take care to avoid 

possible inhalation, ingestion, or con-
tact by any person with Class 7 (radio-
active) materials that may have been 
released from their packagings. 

(b) When contamination is present or 

suspected, the package containing a 
Class 7 material, any loose Class 7 ma-
terial, associated packaging material, 
and any other materials that have been 
contaminated must be segregated as 

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