Originally Posted by
Going Boeing
Uranium enrichment is a complex task requiring specialised equipment that is strictly controlled - does RR have the capability to do high levels of enrichment in-house or is the fuel sourced from the US?
UK does it through
https://en.wikipedia.org/wiki/Urenco_Group
Also note the US doesn't do nuclear enrichment, they are running from a stockpile of enriched uranium they purchased from Ex USSR / russian decommissioned warheads. At current rate they are expecting to need to restart enrichment in / around 2050. Also US has a license for a SILEX (Separation of Isotopes by Laser EXcitation) that was developed in australia in the late 90's