0CMaterials

0C Materials

0C003 Deuterium, heavy water (deuterium oxide) or any other deuterium compounds, for use in a “nuclear reactor” specified by 0A001.a, in which the ratio of deuterium to hydrogen atoms exceeds 1:5,000.

0C004 Graphite having a purity level of less than 5 ppm (parts per million) ‘boron equivalent’ and with a density greater than 1.50 g/cm3 for use in a “nuclear reactor” specified by 0A001.a., in quantities exceeding 1 kg.

N.B.: SEE ALSO 1C107.

Note 1: For the purpose of export control, the Government will determine whether or not the exports of graphite meeting the above specifications are for “nuclear reactor” use.

Note 2: In 0C004, ‘boron equivalent’ (BE) may be determined experimentally or is calculated as the sum of BEz for impurities (excluding BEcarbon since carbon is not considered an impurity) including boron, where:

BEZ (ppm) = CF x concentration of element Z in ppm;

where CF is the conversion factor:

start formula start fraction sigma subscript Z times A subscript B over sigma subscript B times A subscript Z end fraction end formula

and B and Z are the thermal neutron capture cross sections (in barns) for naturally occurring boron and element Z respectively; and AB and AZ are the atomic masses of naturally occurring boron and element Z respectively.

0C005 Specially prepared compounds or powders for the manufacture of gaseous diffusion barriers, resistant to corrosion by UF6 (e.g. nickel or alloy containing 60 weight per cent or more nickel, aluminium oxide and fully fluorinated hydrocarbon polymers), having a purity of 99.9% by weight or more and a particle size less than 10 μm measured by American Society for Testing and Materials (ASTM) B330 standard and a high degree of particle size uniformity.