In the nuclear fuel cycle, which stage directly follows mining and milling?

In the nuclear fuel cycle, which stage directly follows mining and milling?

• A. Enrichment
• B. Conversion
• C. Fuel fabrication
• D. Irradiation

Answer: (B)

The flow of the nuclear fuel cycle moves from ore toward a form that enrichment and subsequent steps can use. After mining and milling, the uranium is typically in a milled concentrate (yellowcake, U3O8). That form isn’t ready for enrichment or fuel fabrication, so it must be chemically transformed into a form suitable for those processes. That transformation is conversion, most often producing uranium hexafluoride (UF6), a volatile compound that can be fed into enrichment plants. Once converted, the material can be enriched to increase the U-235 content, then fabricated into fuel assemblies for irradiation in a reactor. So conversion is the natural next stage because it prepares the material for the enrichment step that follows.

The flow of the nuclear fuel cycle moves from ore toward a form that enrichment and subsequent steps can use. After mining and milling, the uranium is typically in a milled concentrate (yellowcake, U3O8). That form isn’t ready for enrichment or fuel fabrication, so it must be chemically transformed into a form suitable for those processes. That transformation is conversion, most often producing uranium hexafluoride (UF6), a volatile compound that can be fed into enrichment plants. Once converted, the material can be enriched to increase the U-235 content, then fabricated into fuel assemblies for irradiation in a reactor. So conversion is the natural next stage because it prepares the material for the enrichment step that follows.