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首页> 外文期刊>Nuclear Technology >A STRATEGIC RECOVERY OF RARE-METAL FISSION PRODUCTS IN SPENT NUCLEAR FUEL
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A STRATEGIC RECOVERY OF RARE-METAL FISSION PRODUCTS IN SPENT NUCLEAR FUEL

机译：核燃料中稀有裂变产物的战略恢复

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摘要

Based on state-of-the-art separation chemistry, extended recycling of rare-metal fission products (RMFPs) from fast breeder reactors is examined as a new strategy for spent fuel reprocessing. Fission product fractionation is in accordance with the modern trend toward zero emission of toxic materials; salt-free separation utilizing in situ electrochemistry will suit the current direction of research and development in the back end of the nuclear fuel cycle. A catalytic electrolytic extraction and dissolution method, which would avoid secondary waste arising, was proposed to separate the target, the radioactive but potentially strategic elements Pd, Ru, Rh, Tc, Te, and Se, dissolved in high-level liquid waste (HLLW). It was confirmed that RMFPs could be recovered essentially from simulated HLLW with the conceptual scheme, although further studies for the optimization were required to obtain higher recovery ratios of RMFPs. Elemental separation not only offers alternative material resources to meet expanding demands for catalysts in fuel cell/ hydrogen energy systems but is also the first step for transmutation or other selective strategies for waste management of long-lived fission products.
机译：基于最新的分离化学，作为快速发展的乏燃料后处理的新策略，研究了快速增殖反应堆中稀有金属裂变产物（RMFP）的延长回收利用。裂变产物的分馏符合有毒物质零排放的现代趋势。利用原位电化学进行无盐分离将适合当前核燃料循环后端研究和开发的方向。提出了一种催化电解萃取和溶解方法，该方法可避免产生二次废物，以分离溶解在高放废液中的目标，放射性但可能具有战略意义的元素Pd，Ru，Rh，Tc，Te和Se ）。可以肯定的是，尽管需要进行更多的优化研究才能获得较高的RMFP回收率，但仍可以通过概念方案从模拟的高放水中回收RMFP。元素分离不仅提供替代的材料资源，以满足燃料电池/氢能系统中对催化剂不断增长的需求，而且是trans变或长寿命裂变产物废物管理的其他选择性策略的第一步。

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