Show transcribed image text [2] Plutonium that contains less than 7 w/o of 40Pu is called weapons-grade plutonium. It is designated as a special nuclear material (SNM), must be safeguarded and is a subject to the nuclear nonproliferation agreements. Using Figure 4.39 and Figures 4.41-4.43, determine whether any of these commercial nuclear power systems produce weapons-grade plutonium. Assume that all non-fissioning plutonium is 4 Pu. Sec. 4.6 Nuclear Cycles 195 Uranium mining and | Conversion- UF.-Enrichment -3w/oUF01Euel I UFO | 149,297 U U308 to Enrichment 821 2 fabrication 27,249 THM 150,047 U Loss 8 235U 272 THM Loss 750 U 0.2 w/o tails Spent fuel assemblies UO- fuel assemblies DecayedSpent Waste disposal fuel EOC BOC fuel Fuel composition BOC EOc 1. Mass flows in kg's per 0.75 GWe-yr 2. Abbreviations: 235U 813 220 U 26,977 25,858 BOC beginning of refueling cycle EOC- end of refueling cycle FPfission products Pu total plutonium Pu fissile 239Pu + 241 Pu THM total heavy metal -U+Pu 178 246 THM | 26.97기 26,104 Pu fissile- FP U- total uranium Figure 4.39 LWR once-through fuel cycle (Based on Nuclear Proliferation and Civilian Nuclear Power, U.S. Department of Energy report DOE/NE-0001/9, Volume 9, 1980.) Sec. 4.6 Nuclear Cycles 197 Uranium Conversion UF 厂79,387 mining and milling UF Fuel to Enrichment 568 2 fabrication 17,638 U Loss 480 U Loss 6 23U 176 U 0.2 wo tails Recycle UO2 for cnrichment 162 235U 16,572 U EOC spent fuel spent fuel makeup assemblies , Reactor storageassemblies BOC-Puo.uo, recycle assemblies Pu 267FPu 441 Pu Mixed oxide fuel fabrication Waste Pu Reprocessing disposal storage 9056 U Figure 4.41 LWR with plutonium and uranium recycling. (Based on Nuclear Proliferation and Civilian Nuclear Power, U.S. Department of Energy report DOE/NE-0001/9, Volume 9、1980.)