Abstract Scenarios studies have proven the fuel cycle closure feasibility with fleet composed by PWRs and large fast reactors. Nevertheless, large reactors may not be adapted to low or scalable electricity needs (off-grid cities, high renewable share, desalination plant, etc…). Sodium-cooled Small Modular Reactors (SMRs-Na) could be an interesting answer to these needs. However, they tend to be plutonium burners and not breeders, which is contradictory with fuel cycle closure. In this paper, a 400 MWth SMR-Na is used to study PWR-SMR-Na fleet at steady state. It appears that plutonium equilibrium is achievable in such fleet either with the initial SMR-Na design and several constraints on reprocessing strategy (complete separation of all plutonium sources) or by adding axial and radial fertile blankets with a less constrained reprocessing strategy. Then, a comparison with a PWR-SFR fleet shows that SMR-Na could be easier to deploy but at the cost of a greater plutonium inventory.

中文翻译：

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稳定钠冷小型模块化反应堆中钚库存的可能性——压水反应堆

摘要 情景研究证明了由压水堆和大型快堆组成的燃料循环关闭的可行性。然而，大型反应堆可能无法适应低或可扩展的电力需求（离网城市、高可再生能源份额、海水淡化厂等）。钠冷小型模块化反应堆 (SMRs-Na) 可能是满足这些需求的一个有趣的答案。然而，它们往往是钚燃烧器而不是增殖器，这与燃料循环闭合相矛盾。在本文中，使用 400 MWth SMR-Na 来研究处于稳态的 PWR-SMR-Na 机组。通过最初的 SMR-Na 设计和对后处理策略的一些限制（所有钚源的完全分离），或者通过添加轴向和径向可育毯和较少限制的后处理策略，似乎可以在此类舰队中实现钚平衡。