Section 175.703

49 CFR Ch. I (10-1-18 Edition)

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

Minimum separation distances
Centimeters

170.1 to 180.0 .......................................................................................................................
180.1 to 190.0 .......................................................................................................................
190.1 to 200.0 .......................................................................................................................

(b) In addition to the limits on combined criticality safety indexes stated
in Section 175.700(b),
(1) The criticality safety index of any
single group of packages must not exceed 50.0 (as used in this section, the
term  - group of packages -  means packages 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]

Section 175.703 Other special requirements
for the acceptance and carriage of
packages containing Class 7 materials.
(a) No person may accept for carriage
in an aircraft packages of Class 7 materials, other than limited quantities,
contained in a rigid or non-rigid overpack, including a fiberboard box or
plastic bag, unless they have been prepared for shipment in accordance with
Section 172.403(h) of this subchapter.
(b) Each shipment of fissile material
packages must conform to the requirements of SectionSection 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, packages which require external cooling by
an ancillary cooling system or packages subject to operational controls
during transport; or
(2) Liquid pyrophoric Class 7 (radioactive) materials.
(d) Packages with radiation levels at
the package surface or a transport
index in excess of the limits specified
in Section 173.441(a) of this subchapter may
not be transported by aircraft except
under special arrangements approved
by the Associate Administrator.

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Section 175.704 Plutonium shipments.
Shipments of plutonium which are
subject to 10 CFR 71.88(a)(4) must comply with the following:
(a) Each package containing plutonium must be secured and restrained to
prevent shifting under normal conditions.
(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 aircraft on the main deck or the lower
cargo compartment in the aft-most location that is possible for cargo of its
size and weight, and no other cargo
may be stowed aft of packages containing plutonium.
(c) A package of plutonium exceeding
the size and weight limitations in paragraph (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 Divisions), 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.
Section 175.705 Radioactive contamination.
(a) A carrier shall take care to avoid
possible inhalation, ingestion, or contact by any person with Class 7 (radioactive) 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 material, associated packaging material,
and any other materials that have been
contaminated must be segregated as

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