Inventory Difference – ID [Energy] Law and Legal Definition

According to 10 CFR 74.4 [Title 10 – Energy; Chapter I -- Nuclear Regulatory Commission; Part 74 -- Material Control and Accounting of Special Nuclear Material; Subpart A -- General Provisions] the term Inventory Difference (ID) means the arithmetic difference obtained by subtracting the quantity of SNM (Special Nuclear Material) tabulated from a physical inventory from the book inventory quantity. Book inventory quantity is equivalent to the beginning inventory (BI) plus additions to inventory (A) minus removals from inventory (R), while the physical inventory quantity is the ending inventory (EI) for the material balance period in question (as physically determined). Thus mathematically, ID = (BI + A-R)-EI or ID = BI + A-R-EI.