2A225Crucibles made of materials resistant to liquid actinide metals, as follows:

a. Crucibles having both of the following characteristics:
1. A volume of between 150 cm3 and 8 000 cm3; and
2. Made of or coated with any of the following materials, or combination of the following materials, having an overall impurity level of 2 % or less by weight:
a. Calcium fluoride (CaF2);
b. Calcium zirconate (metazirconate) (CaZrO3);
c. Cerium sulphide (Ce2S3);
d. Erbium oxide (erbia) (Er2O3);
e. Hafnium oxide (hafnia) (HfO2);
f. Magnesium oxide (MgO);
g. Nitrided niobium-titanium-tungsten alloy (approximately 50 % Nb, 30 % Ti, 20 % W);
h. Yttrium oxide (yttria) (Y2O3); or
i. Zirconium oxide (zirconia) (ZrO2);
b. Crucibles having both of the following characteristics:
1. A volume of between 50 cm3 and 2 000 cm3; and
2. Made of or lined with tantalum, having a purity of 99,9 % or greater by weight;
c. Crucibles having all of the following characteristics:
1. A volume of between 50 cm3 and 2 000 cm3;
2. Made of or lined with tantalum, having a purity of 98 % or greater by weight; and
3. Coated with tantalum carbide, nitride, boride, or any combination thereof.