Material unaccounted for (MUF), in the context of nuclear material, refers to any discrepancy between a nuclear-weapons state's physical inventory of nuclear material, and the book inventory. The difference can be either a positive discrepancy (an apparent gain of material) or a negative discrepancy (an apparent loss of material).
Material unaccounted for (MUF), in the context of nuclear material, refers to any discrepancy between a nuclear-weapons state's physical inventory of nuclear material, and the book inventory. The difference can be either a positive discrepancy (an apparent gain of material) or a negative discrepancy (an apparent loss of material).
Source: Wikipedia "Material unaccounted for" · CC BY-SA 4.0
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