354 

49 CFR Ch. I (10–1–18 Edition) 

§ 172.102 

(3) Each neutron radiation detector must 

be of welded metal construction with 
brazed metal to ceramic feed through as-
semblies. These detectors must have a 
minimum burst pressure of 1800 kPa as 
demonstrated by design type qualifica-
tion testing; and 

(4) Each detector must be tested to a 1 

× 

10

¥

10

cm

3

/s leaktightness standard before 

filling. 

b. Radiation detectors transported as indi-

vidual components must be transported 
as follows: 

(1) They must be packed in a sealed inter-

mediate plastic liner with sufficient ab-
sorbent or adsorbent material to absorb 
or adsorb the entire gas contents. 

(2) They must be packed in strong outer 

packagings and the completed package 
must be capable of withstanding a 1.8 
meter (5.9 feet) drop without leakage of 
gas contents from detectors. 

(3) The total amount of gas from all detec-

tors per outer packaging must not exceed 
52 grams (1.83 ounces). 

c. Completed neutron radiation detection 

systems containing detectors meeting 
the conditions of paragraph a(1) of this 
special provision must be transported as 
follows: 

(1) The detectors must be contained in a 

strong sealed outer casing; 

(2) The casing must contain include suffi-

cient absorbent or adsorbent material to 
absorb or adsorb the entire gas contents; 

(3) The completed system must be packed 

in strong outer packagings capable of 
withstanding a 1.8 meter (5.9 feet) drop 
test without leakage unless a system’s 
outer casing affords equivalent protec-
tion. 

d. Except for transportation by aircraft, 

neutron radiation detectors and radi-
ation detection systems containing such 
detectors transported in accordance with 
paragraph a. of this special provision are 
not subject to the labeling and 
placarding requirements of part 172 of 
this subchapter. 

e. When transported by highway, rail, ves-

sel, or as cargo on an aircraft, neutron 
radiation detectors containing not more 
than 1 gram of boron trifluoride, includ-
ing those with solder glass joints are not 
subject to any other requirements of this 
subchapter provided they meet the re-
quirements in paragraph a(1) of this spe-
cial provision and are packed in accord-
ance with paragraph a(2) of this special 
provision. Radiation detection systems 
containing such detectors are not subject 
to any other requirements of this sub-
chapter provided they are packed in ac-
cordance with paragraph a(3) of this spe-
cial provision. 

328

When lithium metal or lithium ion bat-

teries are contained in the fuel cell system, 

the item must be described under this 
entry and the appropriate entries for 
‘‘Lithium metal batteries contained in 
equipment’’ or ‘‘Lithium ion batteries con-
tained in equipment’’. 

332

Magnesium nitrate hexahydrate is not 

subject to the requirements of this sub-
chapter. 

335

Mixtures of solids that are not subject 

to this subchapter and environmentally 
hazardous liquids or solids may be classi-
fied as ‘‘Environmentally hazardous sub-
stances, solid, n.o.s,’’ UN3077 and may be 
transported under this entry, provided 
there is no free liquid visible at the time 
the material is loaded or at the time the 
packaging or transport unit is closed. Each 
transport unit must be leakproof when 
used as bulk packaging. 

336

The use of UN1H1 drums, UN3H1 

jerricans, and UN6HA1 composite pack-
agings which meet the requirements of 
part 178 of the HMR at the Packing Group 
I or II performance level. These packagings 
are not required to: (1.) meet the venting 
requirements in § 173.24(g) or (2.) be marked 
with the hydrostatic pressure test marking 
specified in § 173.24a(b)(4). Shipment of 
packages under this special provision must 
be made by private or contract motor car-
rier. Transportation of these packages also 
requires the door of each van trailer to be 
marked with ‘‘Warning trailer may contain 
chemical vapor. Do not enter until vapors 
have dissipated.’’ The driver of the trans-
port vehicle and the consignee(s) must be 
trained not to enter the transport vehicle 
until the ammonia vapors have dissipated, 
and the emergency response information 
on the shipping paper must indicate that 
the vehicle contains ammonia vapors. This 
training must be documented in training 
records required by § 172.704(d). Transport 
vehicles must be vented to prevent accu-
mulation of vapors at a poisonous or flam-
mable concentration. 

337

Authorizes the use of regulated waste 

containers manufactured prior to October 
1, 2006 to be marked with the alternative 
shipping name of Regulated medical waste, 
UN3291 and arrows that deviate as pre-
scribed in § 172.312(a)(2) in that they may be 
black or white. 

338

Life Saving appliances, self-inflating 

transported by motor vehicle only between 
an U.S. Coast Guard approved inflatable 
life raft servicing facility and a vessel are 
only subject to the following requirements: 
a. Prior to repacking into the life-saving 

appliance, an installed inflation cylinder 
must successfully meet and pass all in-
spection and test criteria and standards 
of the raft manufacturer and the vessel 
Flag State requirements for cylinders in-
stalled as part of life-saving appliances, 
self-inflating (UN2990) used on marine 
vessels. Additionally, each cylinder must 

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