Uranium processing facility in NM converts ore to yellow cake and/or yellow cake to UF6 for enrichment. We still need to mine U nat for fuel.
All DOE sites involved in the fuel cycle are L or Q. Escorts are required for those uncleared temp workers. The numbers vary on escort to visitor ratio (1:3 at some sites, 1:5 at others).
I had an escort at SRNL until my L came through (even to the bathroom). Before the Naval Fuels Complex was torn down at SRS, certain rooms were Q access (for a shutdown facility). Most DOE sites have clearance issue areas (a lot of it legacy).
BA