Foreward Model Calculations for Determining Isotope Compositions of Material Used in a Radiological Dispersal Device

The NNSA is undertaking an effort entitled the Safeguards First Principles Initiative to develop a principle-based standard for Nuclear Material Control and Accountability (MC&A) Programs. The standard will establish fundamental principles around which the NNSA expects its management and operating contractors to develop and implement their MC&A programs; support standardized implementation of effective and efficient MC&A programs that are tailored to a well-characterized risk; facilitate consistent implementation that is defensible from a risk management perspective with measurable performance; provide a basis for designing MC&A Programs in the context of the nuclear material inventory holdings and missions at the site; be tested at the Y-12 National Security Complex; and validated by external oversight. The objective of the Initiative is to prepare a standard for developing, implementing, and evaluating Nuclear Material Control and Accountability Programs to be adopted NNSA-wide.