[1]胡小刚,杜成杰,潘晓龙,等.中子毒物硼和钆在乏燃料后处理中的应用及合金相图研究[J].中国材料进展,2024,43(02):151-163.[doi:10.7502/j.issn.1674-3962.202209009]
　HU Xiaogang,DU Chengjie,PAN Xiaolong,et al.Application of Neutron Poison Boron and Gadolinium and Alloy Phase Diagram Study in Spent Fuel Reprocessing[J].MATERIALS CHINA,2024,43(02):151-163.[doi:10.7502/j.issn.1674-3962.202209009]
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中子毒物硼和钆在乏燃料后处理中的应用及合金相图研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
43
期数:
2024年第02期
页码:
151-163
栏目:
出版日期:
2024-02-28

文章信息/Info

Title:
Application of Neutron Poison Boron and Gadolinium and Alloy Phase Diagram Study in Spent Fuel Reprocessing
文章编号:
1674-3962(2024)02-0151-13
作者:
胡小刚; 杜成杰; 潘晓龙; 刘承泽; 吴金平; 张于胜
1. 西安稀有金属材料研究院有限公司，陕西 西安 710016 2. 江苏科技大学材料科学与工程学院，江苏 镇江 212100 3. 西北有色金属研究院，陕西 西安 710016
Author(s):
HU Xiaogang;  DU Chengjie;  PAN Xiaolong;  LIU Chengze; WU Jinping;  ZHANG Yusheng
1. Xi’an Rare Metal Materials Institute Co., Ltd., Xi’an 710016, China 2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China 3. Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China
关键词:
中子毒化; Ti35; 锆合金; 硼; 钆; 相图
Keywords:
neutron poisoning;  Ti35;  zirconium alloy;  boron;  gadolinium;  phase diagram
分类号:
TG146.4
DOI:
10.7502/j.issn.1674-3962.202209009
文献标志码:
A
摘要:
随着我国核电站在建及运行的反应堆日渐增多，乏燃料的产生、运输和储存成为核工业面临的严峻难题。对卸载出的巨量核废乏燃料，采用闭环处理循环利用，比传统深埋更加环保和安全。采用添加中子毒物的核结构材料制造相关设备和仪器，可以保障乏燃料后处理过程的运行安全。基于核工业应用要求，针对乏燃料后处理常用的316L不锈钢、Ti35、Zr等材料添加B或者Gd的相图展开调研，结果显示B和Gd可明显提高结构材料的中子吸收效果，但B和Gd的化学性质与过渡族金属Fe，Ti，Zr等相差甚远，除α-Zr最多固溶2.8%Gd（原子数分数）以外，B和Gd均不能大量固溶于常规金属合金体系中，强制添加势必对合金力学性能或耐蚀性能带来巨大危害。可采用团簇模型的合金设计理念，通过含B和Gd化合物相均匀析出或者复合的制造工艺以及Zr-Gd、Ti-Gd体系的多元合金化，引入互溶的中间相，增加难以固溶的元素的固溶度，以此解决中子毒物B和Gd在乏燃料后处理中的应用瓶颈。
Abstract:
With the increasing number of reactors in China’s nuclear power plants, the generation, transportation and storage of spent fuel have become a serious problem. The closed-loop treatment and recycling of the huge amount of dangerous nuclear spent fuel unloaded is more environmentally friendly and safe than traditional deep burial. Using neutron poison optimized structural materials to manufacture related equipment and instruments, can ensure the safe operation of spent fuel postprocessing. This work investigates the phase diagram of B or Gd added to 316L stainless steel, Ti35, zirconium and other materials commonly used in spent fuel reprocessing. The results show that B and Gd can significantly improve the neutron absorption effect of structural materials, but the chemical properties of B and Gd are far different from those of transition metal. The phase diagram shows that, except for the maximum solid solution of α-Zr is 2.8at% Gd, B and Gd cannot be dissolved in conventional metal alloy systems in large quantities. Forced addition is bound to bring great harm to the mechanical properties or corrosion resistance of the alloy. The cluster model can be adopted to increase the solid solubility of elements that are difficult to be dissolved. Through the manufacturing process of homogeneous precipitation or recombination of B and Gd compound phases and the multialloying of Zr-Gd and Ti-Gd systems, the mutually soluble intermediate phases can be introduced to solve the application bottleneck of neutron poisons B and Gd in spent fuel reprocessing.

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备注/Memo

备注/Memo:
收稿日期：2022-09-07修回日期：2022-10-14 基金项目：国家自然科学基金项目(52201021)；陕西省重点研发计划项目(2021GY-249)；国防科技工业核材料创新基金项目(ICNM-2021-ZH-16) 第一作者：胡小刚，男，1988年生，高级工程师，硕士生导师 通讯作者：潘晓龙，男，1979年生，教授，硕士生导师， Email:xlpan_rmi@126.com
更新日期/Last Update: 2024-01-29