学术
人造岩石固化掺铀模拟放射性焚烧灰
滕元成[1] 张朝彬[2] 车春霞[3] 曾冲胜[1] 周冠南[4]
[1]西南科技大学先进建筑材料四川省重点实验室,四川绵阳621010 [2]中国工程物理研究院,四川绵阳621900 [3]中国石油兰州石化公司石化研究院,甘肃兰州730060 [4]西南科技大学环境与资源学院,四川绵阳621010
摘 要:
以天然锆英石、模拟放射性焚烧灰、CaCO3、TiO2、UO2为原料,采用高温固相反应,对人造岩石固化掺铀模拟放射性焚烧灰进行研究。借助XRD、SEM、抗浸出性能测试等分析测试方法,研究固化体的性能。结果表明：在空气气氛下烧结,固化体的晶相为CaZrTi2O7[Ca（Zr,U）Ti2O7]、CaTiSiO5、CaTiO3和CaUO4,一部分U固溶于Ca（Zr,U）Ti2O7中;较多CaZrTi2O7的生成有利于Ca（Zr,U）Ti2O7固溶更多的U;模拟放射性焚烧灰掺量为60%、UO2含量为6.88%的人造岩石固化体,1～35 d铀的归一化浸出率为0.17～2.81μg/（cm^2·d）,42～192 d铀的归一化浸出率为0.09～0.13μg/（cm^2·d）。[著者文摘]
文章出处:
《原子能科学技术》-2008年42卷1期 -43-48页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-6931（2008）01-0043-06
Synroc Immobilization of Simulated Radioactive Incineration Ash Doped Uranium
TENG Yuan-cheng,ZHANG Chao-bin,CHE Chun-xia,ZENG Chong-sheng,ZHOU Guan-nan（1.Sichuan Province Key Laboratory of Advanced Construction Materials,Southwest University of Science and Technology,Mianyang 621010,China;2.China Academy of Engineering Physics,Mianyang 621900,China;3.Petrochemical Research Institute of Lanzhou Petrochemical Company,PetroChina,Lanzhou 730060,China;4.Institute of Environment and Natural Resources,Southwest University of Science and Technology,Mianyang 621010,China）
Abstract:
The researches on synroc immobilization of simulated radioactive incineration ash（SRIA） doped uranium were carried out by solid-state reaction at high temperature,using zirconite,SRIA, CaCO3,TiO2 and UO2 as raw materials.The properties of synroc form were investigated by means of X-ray diffraction analysis,scanning electron microscope analysis and leaching property test.The results indicate that the crystal phases of synroc form sintered in air are zirconolite CaZrTi2O7[Ca（Zr,U）Ti2O7],sphene（CaTiSiO5）,CaTiO3 and CaUO4.A part of uranium is solidified in Ca（Zr,U）Ti2O7.The more CaZrTi2O7 is propitious to solidifying the more uranium in Ca（Zr,U）Ti2O7.The unitary uranium leaching rates of synroc form doped SRIA of 60% and UO2 of 6.68% are 0.17-2.81 μg/（cm^2·d） for 1-35 d and 0.09-0.13 μg/（cm^2·d） for 42-192 d.[著者文摘]
Key words:
radioactive incineration ash;synroc immobilization;zirconolite;sphene;uranium
基金资助:
国家自然科学基金资助项目（10775113）; 国防学科重点实验室资助项目
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