873 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 175.706 

(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 
far as practicable from personnel con-
tact until radiological advice or assist-
ance is obtained from the U.S. Depart-
ment of Energy or appropriate State or 
local radiological authorities. 

(c) An aircraft in which Class 7 (ra-

dioactive) material has been released 
must be taken out of service and may 
not be returned to service or routinely 
occupied until the aircraft is checked 
for radioactive substances and it is de-
termined that any radioactive sub-
stances present do not meet the defini-
tion of radioactive material, as defined 
in § 173.403 of this subchapter, and it is 
determined in accordance with § 173.443 
of this subchapter that the dose rate at 
every accessible surface must not ex-
ceed 0.005 mSv per hour (0.5 mrem per 
hour) and there is no significant re-
movable surface contamination. 

(d) Each aircraft used routinely for 

transporting Class 7 materials shall be 
periodically checked for radioactive 
contamination, and an aircraft must be 
taken out of service if contamination 
exceeds the level specified in paragraph 
(c). The frequency of these checks shall 
be related to the likelihood of contami-
nation and the extent to which Class 7 
materials are transported. 

(e) In addition to the reporting re-

quirements of (§§ 171.15 and 171.16 of 
this subchapter and § 175.31 of this part, 
an aircraft operator shall notify the of-
feror at the earliest practicable mo-
ment following any incident in which 
there has been breakage, spillage, or 
suspected radioactive contamination 
involving Class 7 (radioactive) mate-
rials shipments. 

[71 FR 14604, Mar. 22, 2006, as amended at 79 
FR 40618, July 11, 2014; 80 FR 1164, Jan. 8, 
2015] 

§ 175.706

Separation distances for un-

developed film from packages con-
taining Class 7 (radioactive) mate-
rials. 

No person may carry in an aircraft 

any package of Class 7 (radioactive)