2.A.1.Crucibles 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 (150 ml) and 8000 cm³ (8 l); 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 (50 ml) and 2000 cm³ (2 l); 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 (50 ml) and 2000 cm³ (2 l);
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.