Classification of uranium compounds handled at the AREVA NC Pierrelatte plant
| Characteristics of uranium compounds | Details |
| Solubility* | |
| Type F | UF6, UF4, UO2 (NO3)2, (UO4, nH2O) |
| Type M | (U2O7) (NH4)2, U3O8, UO2F2, UO3 |
| Type S | UO2 |
| Isotopic composition† | |
| Natural uranium | 234U, 235U, 238U |
| Reprocessed uranium | 232U, 233U, 234U, 235U, 236U, 237U, 238U, 237Np, 241Am, 238–241Pu |
↵* The solubility of uranium compounds was determined in terms of absorption types (F-fast, M-moderate or S-slow solubility) according to the Human Respiratory Tract Model described in International Commission on Radiological Protection publication 6615 and to specific workstations analytical studies.16,17
↵† The isotopic composition and relative abundance of each isotope being variable and rarely known precisely, only the most important isotopes from the point of view of contamination were reported.