Physical Inventories and Material Balances at Fuel Cycle Facilities

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment draft regulatory guide (DG), DG- 5056, ``Physical Inventories and Material Balances at Fuel Cycle Facilities.'' This new regulatory guide (RG) would provide implementing guidance for material control and accounting (MC&A) requirements in NRC regulations related to the performance, evaluation, and reporting of physical inventories of special nuclear material, and material balances at fuel cycle facilities. Guidance on these requirements was previously provided in RG 5.13, ``Conduct of Nuclear Material Physical Inventories,'' and RG 5.33, ``Statistical Evaluation of Material Unaccounted For,'' that were issued in 1973 and 1974, respectively. Both RG 5.13 and RG 5.33 would be withdrawn concurrent with issuance of DG-5056 in final form.