Low dispersible radioactive material
The design for low dispersible radioactive material shall require multilateral approval.Low dispersible radioactive material shall be such that the total amount of this radioactive material in a package, taking into account the provisions of 6.4.8.14,shall meet the following requirements:
(a)The radiation level at 3 m from the unshielded radioactive material does not exceed 10mSv/h;
(b)If subjected to the tests specified in 6.4.20.3 and 6.4.20.4, the airborne release in gaseous andparticulate forms of up to 100 μm aerodynamic equivalent diameter would not exceed 100 A2.A separate specimen may be used for each test; and
(c)If subjected to the test specified in 2.2.7.2.3.1.4 the activity in the water would not exceed100 A2. Inthe application of this test, the damaging effects of the tests specified in (b) aboveshall be taken into account.
Low dispersible radioactive material shall be tested as follows:
A specimen that comprises or simulates low dispersible radioactive material shall be subjected tothe enhanced thermal test specified in 6.4.20.3 and the impact test specified in 6.4.20.4. A different specimen may be used for each of the tests. Following each test, the specimen shall be subjected to the leach test specified in2.2.7.2.3.1.4. After each test it shall be determined if the applicable requirements of 2.2.7.2.3.4.1 have been met.
Demonstration of compliance with the performance standards in2.2.7.2.3.4.1 and2.2.7.2.3.4.2 shall be inaccordance with 6.4.12.1 and 6.4.12.2.
Fissile material
Fissile material and packages containing fissile material shall be classified under the relevant entry as “FISSILE” in accordance with Table 2.2.7.2.1.1 unless excepted by one of the provisions of sub-paragraphs (a) to (f) below and carried subject to the requirements of 7.5.11 CV33 (4.3). All provisions apply only to material in packages that meets the requirements of 6.4.7.2 unless unpackagedmaterial is specifically allowed in the provision.
(a)Uranium enriched in uranium-235 to a maximum of 1% by mass, and with a total plutoniumand uranium-233 content not exceeding 1% of the mass of uranium-235, provided that thefissile nuclides aredistributed essentially homogeneously throughout the material. In addition,if uranium-235 is present in metallic, oxide or carbide forms, it shall not form a latticearrangement;
(b)Liquid solutions of uranyl nitrate enriched in uranium-235 to a maximum of 2%by mass, witha total plutonium and uranium-233 content not exceeding 0.002% of the mass of uranium, andwith a minimum nitrogen to uranium atomic ratio (N/U) of 2;
(c)Uranium with a maximum uranium enrichment of 5% by mass uranium-235 provided:
(i)There is no more than 3.5 g of uranium-235 per package;
(ii)The total plutonium and uranium-233 content does not exceed 1% of the mass ofuranium-235 per package;
(iii)Carriage of the package is subject to the consignment limit provided in 7.5.11 CV33(4.3)(c);
(d)Fissile nuclides with a total mass not greater than 2.0 g per package provided the package iscarried subject to the consignment limit provided in 7.5.11 CV33 (4.3)(d);
(e)Fissile nuclides with a total mass not greater than 45 g either packaged or unpackaged subjectto limits provided in 7.5.11 CV33 (4.3)(e);
(f)A fissile material that meets the requirements of 7.5.11 CV33 (4.3)(b), 2.2.7.2.3.6 and5.1.5.2.1.
A fissile material excepted from classification as “FISSILE” under 2.2.7.2.3.5 (f) shall be subcritical without the need for accumulation control under the following conditions:
(a)The conditions of 6.4.11.1 (a);
(b)The conditions consistent with the assessment provisions statedin 6.4.11.12 (b) and6.4.11.13(b) for packages.
Classification of packages or unpacked material
The quantity of radioactive material in a package shall not exceed the relevant limits for the package type as specified below.
Classification as excepted package
A package may be classified as an excepted package if it meets one of the following conditions:
(a)It is an empty package having contained radioactive material;
(b)It contains instruments or articles not exceeding the activity limits specified in columns (2) and(3)of Table 2.2.7.2.4.1.2;
(c)It contains articles manufactured of natural uranium, depleted uranium or natural thorium;
(d)It contains radioactive material not exceeding the activity limits specified in column (4) ofTable 2.2.7.2.4.1.2; or
(e)It contains less than 0.1 kg of uranium hexafluoride not exceeding the activity limits specifiedin column (4) of Table 2.2.7.2.4.1.2.
A package containing radioactive material may be classified as an excepted package provided that the radiationlevel at any point on its external surface does not exceed 5 μSv/h.
Table 2.2.7.2.4.1.2: Activity limits for excepted packages
|
Physical state of contents |
Instruments or articles |
Materials Package limits a |
|
|
Item limits a |
Package limits a |
||
|
(1) |
(2) |
(3) |
(4) |
|
Solids |
|||
|
special form |
10-2 A1 |
A1 |
10-3 A1 |
|
other form |
10-2 A2 |
A2 |
10-3 A2 |
|
Liquids |
10-3 A2 |
10-1 A2 |
10-4 A2 |
|
Gases |
|||
|
tritium |
2 x 10-2 A2 |
2 x 10-1 A2 |
2 x 10-2 A2 |
|
special form |
10-3 A1 |
10-2 A1 |
10-3 A1 |
|
other forms |
10-3 A2 |
10-2 A2 |
10-3 A2 |
a For mixtures of radionuclides, see 2.2.7.2.2.4 to 2.2.7.2.2.6.
Radioactive material which is enclosed in or is included as a component part of an instrument or other manufactured article may be classified under UN No. 2911 RADIOACTIVE MATERIAL, EXCEPTED PACKAGE - INSTRUMENTS or ARTICLES provided that:
(a)The radiation level at 10 cm from any point on the external surface of any unpackagedinstrument or article is not greater than 0.1mSv/h;
(b)Each instrument or manufactured article bears the mark "RADIOACTIVE" on its externalsurface except for the following:
(i)radioluminescent time-pieces or devices;
(ii)consumer products that have either received regulatory approval in accordance with1.7.1.4 (e) or do not individually exceed the activity limit for an exempt consignment inTable 2.2.7.2.2.1 (column 5), provided such products are transported in a package thatbears the mark "RADIOACTIVE" on its internal surface in such a manner that awarning of the presence of radioactive material is visible on opening the package; and
(iii)other instruments or articles too small to bear the mark "RADIOACTIVE", providedthat they are transported in a package that bears the mark "RADIOACTIVE" on itsinternal surface in such a manner that a warning of the presence of radioactive materialis visible on opening the package;
(c)The active material is completely enclosed by non-active components (a device performing thesole function of containing radioactive material shall not be considered to be an instrument ormanufactured article); and
(d)The limits specified in columns 2 and 3 of Table 2.2.7.2.4.1.2 are met for each individual itemand each package, respectively.
Radioactive material in forms other than as specified in 2.2.7.2.4.1.3 and with an activity not exceeding the limitsspecified in column4 of Table 2.2.7.2.4.1.2, may be classified under UN No. 2910 RADIOACTIVE MATERIAL, EXCEPTED PACKAGE - LIMITED QUANTITY OF MATERIAL provided that:
(a)The package retains its radioactive contents under routine conditions of carriage; and
(b)The package bears the mark "RADIOACTIVE" on either:
(i)An internal surface in such a manner that a warning of the presence of radioactivematerial is visible on opening the package; or
(ii)The outside of the package, where it is impractical to mark an internal surface.
Uranium hexafluoride not exceeding the limits specified in Column 4 of Table 2.2.7.2.4.1.2 may be classified under UN 3507 URANIUM HEXAFLUORIDE, RADIOACTIVE MATERIAL, EXCEPTED PACKAGE, less than 0.1 kg per package, non-fissile or fissile-excepted provided that:
(a)The mass of uranium hexafluoride in the package is less than 0.1 kg;
(b)The conditions of 2.2.7.2.4.5.2and 2.2.7.2.4.1.4 (a) and (b) are met.
Articles manufactured of natural uranium, depleted uranium or natural thorium and articles in which the sole radioactive material is unirradiated natural uranium, unirradiated depleted uranium or unirradiated natural thorium may be classified under UN No.2909 RADIOACTIVE MATERIAL, EXCEPTED PACKAGE - ARTICLES MANUFACTURED FROM NATURAL URANIUM or DEPLETED URANIUM or NATURAL THORIUM, provided thatthe outer surface of the uranium or thorium is enclosed in an inactive sheath made of metal or some other substantial material.
An empty packaging which had previously contained radioactive material may be classified under UN No.2908 RADIOACTIVE MATERIAL, EXCEPTED PACKAGE - EMPTY PACKAGING, provided that:
(a)It is in a well-maintained condition and securely closed;
(b)Theouter surface of any uranium or thorium in its structure is covered with an inactive sheathmade of metal or some other substantial material;
(c)The level of internal non-fixed contamination, when averaged over any 300cm2, does notexceed:
(i)400 Bq/cm2for beta and gamma emitters and low toxicity alpha emitters; and
(ii)40 Bq/cm2for all other alpha emitters; and
(d)Any labels which may have been displayed on it in conformity with 5.2.2.1.11.1 are no longervisible.