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Appendix E: Glossary and Acronyms GLOSSARY OF KEY TERMS The terms are defined in this glossary for the purpose of usage in this particular report. Adaptive adversary An opponent that reacts to actions and protective measures by constantly adapting or inventing new pathways to do harm Best practice An approach or method that has consistently proven to be exceptionally effective and is used as a standard against which other approaches are gauged Case-by-case assessments A systematic analysis of a problem using multidisciplinary teams of subject matter experts assembled to address a specific problem Decision maker Programmatic decision maker within the U.S. government Extrinsic attributes Properties of a nuclear fuel cycle dependent on implementation of safeguards, operations, and facility details Intrinsic attributes Properties inherent to a nuclear fuel cycle, usually related to materials and processes Predefined framework A structured analysis used to assess the proliferation resistance of a fuel cycle, which contains predetermined lists of detailed attributes of the fuel cycle and a predetermined approach for scoring and combining these attributes to determine the cycle’s overall proliferation resistance Policy maker A person within the U.S. government who is making policy decisions or is responsible for enacting policies Political science A social science concerned primarily with the structure, behavior, and interactions of states, governments, and other political institutions Probabilistic risk assessment A method of analyzing risks associated with complex, interrelated systems by assessing what can go wrong, how likely it is to occur, and what the consequences are if it does happen (Kaplan and Garrick 1981) 76

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APPENDIX E 77 Proliferation The development of and/or acquisition of a nuclear weapon by a non–nuclear weapon state Proliferation resistance “The characteristics of a nuclear energy system that impede the diversion or undeclared production of nuclear material or misuse of technology by states in order to acquire nuclear weapons or other nuclear explosive devices” (IAEA 2002) Proliferation resistant Used to describe nuclear fuel cycles or components of a fuel cycle to indicate an increased barrier to proliferation, often misunderstood or misinterpreted as “proliferation proof” Proliferation risk The committee purposefully did not define this term but suggests its definition be determined by analysts and users of the assessments. One definition introduced to the committee was, “The probability that a host-state will choose to proliferate along a particular or multiple pathways (L), the probability of success along that path (P), and the consequences of proliferation (C).” This definition is used throughout the report but should not be interpreted as endorsement by the committee Social science An academic area of study that examines the behavior and development of human society and the interaction of individuals to and in society ACRONYMS CANDU CANada Deuterium Uranium reactor DOE U.S. Department of Energy DOE-NE DOE Office of Nuclear Energy DOE-NNSA DOE National Nuclear Security Administration DUPIC direct use of pressurized water reactor spent fuel in CANDU E&R enrichment and reprocessing EPA U.S. Environmental Protection Agency FOM Figure of Merit GEN III Generation III; current nuclear fuel cycles GEN IIIa Generation III; advanced light water reactors GEN IV Generation IV; future nuclear fuel cycles GIF Generation IV International Forum GNEP Global Energy Nuclear Partnership IAEA International Atomic Energy Agency INFCIRFC IAEA Information Circular INPRO International Project on Innovative Reactors and Nuclear Fuel Cycles JAEA Japan Atomic Energy Agency

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78 APPENDIX E MYRRHA a flexible fast spectrum research reactor at the Belgian Nuclear Research Centre in Mol NAS National Academy of Sciences NCA Nuclear Cooperation Agreement NNWS non-nuclear weapons state NPAS Nonproliferation Assessment Statement NPT Treaty on the Non-Proliferation of Nuclear Weapons NRC National Research Council NSG Nuclear Suppliers Group OUO official use only PEIS programmatic environmental impact statement PR&PP Proliferation Resistance and Physical Protection PRA probabilistic risk assessments RIPA Risk-Informed Probabilistic Analysis SAPRA Simplified Approach for Proliferation Resistance Assessment SNM special nuclear material TAMU MAUA Texas A&M University Multi-Attribute Utility Analysis USNRC U.S. Nuclear Regulatory Commission TOPS Technical Opportunities to Increase Proliferation Resistance of Global Civilian Nuclear Power Systems