共查询到20条相似文献,搜索用时 0 毫秒
1.
2.
3.
分光光度法测定高放废液中的铀 总被引:1,自引:0,他引:1
样品用2.0mol/L HNO3调节酸度,通过CL-TBP萃淋树脂分离柱(长为70mm;外径10mm;流速1.5~2.0mL/min),用15mL1.0mol/L HNO3淋洗杂质,再用15mL蒸馏水洗脱树脂上吸附的U[Ⅵ],分离纯化后的样品用分光光度法测定铀的含量。采用0.05%偶氮胂Ⅲ为显色剂,0.4mol/L氯乙酸-0.4mol/L氯乙酸钠为缓冲剂,在λ=652nm处测量吸光度。模拟样品的相对标准偏差为1.5%,回收率为97%~101%。高放废液样品的RSD为3%,重加回收率为102%。 相似文献
4.
5.
6.
7.
Java技术在辐射图像处理领域的应用研究 总被引:1,自引:0,他引:1
辐射图像的获取和处理是现代民用核技术发展的一个重要方向,首先论述了Java图像处理技术三个阶段即Java AWT,Java 2D和JAI的基本理论,然后以JAI技术在集装箱透视图像中的应用为例分析了Java技术在辐射图像领域的应用。 相似文献
8.
9.
10.
11.
12.
13.
14.
15.
16.
《核技术》2015,(5)
同步辐射是由同步辐射装置产生的宽光谱、高通量、高准直、高亮度的优质光源,在许多领域已得到广泛应用。同步辐射光束的光斑大小是其最为重要的特性之一。常规测量光斑大小的方法是采用狭缝或刀片扫描光束,然后根据光强变化计算出光斑的大小,这种方式准确度高,但过程繁琐、效率较低。同步辐射光束照射到荧光靶上会形成可见光光斑,通过安装在光束线上的共轴摄像头可以获取光斑的图像信息。本文提出一种基于图像处理的光斑提取方法,能够快速提取光斑大小并显示光斑中心的位置以及光斑的对称性。测试结果表明:该方法能够实时地获取同步辐射光斑特征信息,且光斑尺寸在一定范围变化时具有较高的准确性,在光束线调试过程中可以作为一种有效的辅助测量手段。 相似文献
17.
18.
研究了异丙氧基杯[4]冠-6(简称iPr-C[-4]C6)/正辛醇的萃取性能,主要考察了酸度、模拟高放废液对萃取铯离子以及主要锕系元素和锝的影响,初步研究了辐照剂量对iPr-C[4]C6/正辛醇萃取铯离子的影响。研究表明:水相中无模拟料液时,酸度对iPr-C[-4]C6萃取铯离子的影响较大;除钾离子外,其它共存离子对萃取铯离子的影响较小;有模拟料液存在情况下,酸度的影响较小,而稀释倍数影响较大;辐照剂量小于10^5Gy时,体系对铯离子萃取无明显影响。在硝酸溶液中,萃取体系对锕系元素的萃取率很低;有模拟料液时,除镅和锝外。其它元素的分配比明显升高。 相似文献
19.
20.
Capacitor-grade polypropylene films were aged under multiple stresses (electrical, thermal, and radiation). The aging experiments were performed for both singular and simultaneous combined stresses. The polypropylene was exposed to combined neutron-gamma radiation with a total dose of 1.6×106 rad, electrical stress at 40 V rms/μm, and thermal stress at 90°C. Post-aging diagnostics consisting of electrical, mechanical, physical and chemical characterization were carried out to identify degradation mechanisms for polypropylene films under multifactor stress aging. The most pronounced changes were observed in the mechanical properties of the film. Significant decrease in elongation at break and tensile strength proved deterioration of the polypropylene under combined neutron-gamma radiation. This decrease was caused by chain-scission of the polypropylene molecules. The temperature stress had an opposite effect, causing an increase in the above-mentioned properties and offsetting, therefore, the negative effect of radiation. Although changes were observed in the electrical properties, they were not as significant as those for the mechanical characteristics. It can be concluded, that the failure mechanism of the electrical insulation under multistress aging conditions could be a mechanical failure of the material, rather than direct homogeneous decay in the dielectric strength or thermal breakdown of the polymer 相似文献