Overview of the Oak Ridge National Laboratory Nuclear Materials Accounting System

This paper presents a brief description of the nuclear materials accounting system at the Oak Ridge National Laboratory (ORNL) in Oak Ridge,Tennessee. ORNL is a multidiscipline laboratory which is managed and operated for the Department of Energy (DOE) by UT-Battelle, L.L.C.The High Flux Isotope Reactor (HFIR), one of the two operating reactors in the DOE complex, is located at ORNL. The ORNL nuclear materials accounting system has been designed and implemented to meet the materials control and accountability (MC&A) requirements contained in DOE Order 474.1A and DOE Manuals 474.1-1A and 474.1-2.A combination of a paper system and the Local Area Network Materials Accounting System (LANMAS) is used at ORNL. LANMAS is the standard core accounting program/system developed by DOE for application at individual sites. LANMAS provides a near-realtime data collection and accounting system for the eighteen different DOE-defined material types that must be controlled and tracked. Currently, ORNL has accountable quantities of material in sixteen of the eighteen material types. LANMAS assures rapid reconciliation of nuclear material inventories and facilitates timely reporting of shipments of nuclear materials to and from ORNL. It also generates the official documentation (DOE Form 741) for shipments and receipts, the electronic datasets for submission to the DOE Nuclear Materials Management and Safeguards System (NMMSS), and numerous reports used by management, the ORNL Nuclear Materials Control and Accountability (NMC&A) Department staff, and the owners/users of the accountable nuclear materials.This overview also outlines the pros and cons of the system, potential changes, and the plans for compatibility with the upgraded NMMSS.