| 高温及γ辐照老化对改性钠基膨润土影响的初步研究 |
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| 引用本文： | 梁栋,刘伟,杨仲田,杨卫兵,孙庆红.高温及γ辐照老化对改性钠基膨润土影响的初步研究[J].辐射研究与辐射工艺学报,2012(3):187-192. |
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| 作者姓名： | 梁栋 刘伟 杨仲田 杨卫兵 孙庆红 |
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| 作者单位： | [1]中核高放废物地质处置评价技术重点实验室中国辐射防护研究院,太原030006 [2]兰州大学核科学与技术学院,兰州730000 |
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| 基金项目： | 国防科工局“十一五”高放废物地质处置技术研究（科工计[2007]514号）资助 |
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| 摘 要： | 为了确认高温及γ辐照对改性钠基膨润土的影响.以内蒙古高庙子改性钠基膨润土为研究对象,利用X射线衍射仪和同步热分析仪分析了高温热老化、γ辐照老化和γ辐照-热程序老化作用对改性钠基膨润土性能和微观结构的影响.发现单纯热作用或单纯的辐照作用影响较小,而辐射-热程序老化作用会显著影响改性钠基膨润土的微观结构.经过1000 kG...
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| 关 键 词： | 地质处置 缓冲材料 改性钠基膨润土 热老化 γ辐照老化 γ辐照老化-热程序老化 |
A Preliminary study on the influences of thermal and y-rays irradiation aging on modified sodium bentonite |
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| LIANG Dong,LIU Wei,YANG Zhongtian,YANG Weibing,SUN Qinghong.A Preliminary study on the influences of thermal and y-rays irradiation aging on modified sodium bentonite[J].Journal of Radiation Research and Radiation Processing,2012(3):187-192. |
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| Authors: | LIANG Dong LIU Wei YANG Zhongtian YANG Weibing SUN Qinghong |
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| Affiliation: | (CNNC Key Laboratory on Geological Disposal of High-level Radioactive Waste, China institute for Radiation Protection Taiyuan 030006, China; School of nuclear science and technology, Lanzhou University, Lanzhou 730000, China) |
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| Abstract: | Taking modified sodium bentonite, from Gaomiaozi, Inner Mongolia, as research object, the thermal aging, y-rays irradiation aging, and radiation-thermal sequential aging were investigated by X-rays diffractometer and STA, separately. The corresponding effects on the property and microstructure of modified sodium bentonite demonstrate that the impact of either thermal aging or y-rays irradiation aging is limited. However, the effect induced by radiation-thermal sequential aging is significant. After 1000 kGy y-rays irradiation and thermal-aging for 9000 h at 120℃, montmorillonites have turned into illites; furthermore, crystal cells also have decreased from 15.8 nm to 6.0 nm or so in length. Therefore the thermal and 7-rays irradiation impacts should be considered in future research work. |
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| Keywords: | Geological disposal Buffer material Modified Na-bentonite Thermal-aging γ-rays irradiation aging Radiation-thermal sequential aging |
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