The invention discloses an experimental device for dissolving uranium foil, including a dissolving tank and a sampler; the sampler includes a sampling piston, a shell, a sampling tube and a sampling tube control valve; the sampling tube is connected to the inner part of the shell and is controlled by the sampling tube control valve; the inner part of the shell is tightly connected with the inner cavity of the sampler; the sampling piston is provided with a sampling groove; and the sampling piston energy is controlled by the sampling tube. The sampling tube is connected by moving along the inner part of the housing so that the sampling slot extends into the dissolving tank for sampling or returns the sampling slot to the inner part of the housing. The beneficial effects of the invention are as follows: the dissolving device of the invention can sample at any time in the closed state of the dissolving tank, avoiding the loss of experimental data, and is suitable not only for the study of uranium foil dissolution, but also for the sampling experiments of other chemical reactions under high temperature and pressure. During the dissolving process, the dissolving tank can be sampled and detected at any time to monitor the dissolving process of uranium foil. It provides conditions for the finalization of process flow.
【技术实现步骤摘要】
一种铀箔溶解实验装置
本专利技术涉及核化工领域,具体一种铀箔溶解实验装置。
技术介绍
99Mo是一种人工放射性核素,半衰期为66h,衰变得到99mTc。99mTc是现代核医学中应用最广泛的同位素,99mTc药物占临床用放射性诊断药物的80%以上。目前,全球99Mo主要通过从235U裂变产物中提取,核反应:235U(n,f)99Mo。使用低浓铀靶件与高浓铀靶件生产裂变99Mo的主要区别在于:若生产同样量的99Mo,低浓铀(铀235含量<20%)靶中铀的含量为高浓铀(铀235含量>93%)靶件的5-6倍。U量的增大给制靶和溶靶工作带来了难题。低浓铀靶件采用的是铀箔形式的靶件,靶件的溶解是对低浓铀箔纯铀的溶解。在工艺研究中需要随时对铀箔溶解液进行测定实验,以获得铀溶解的反应动力学等数据。纯铀的纯度可达99.995%,密度19.05g/cm3,在空气中极易氧化溶解于酸,对碱性溶液呈惰性,但密度较大,单晶结构常温常压下在酸中的溶解缓慢。铀箔溶解于酸是放热反应,溶解速率与温度、压力和酸度有关,为了提高溶解速率,可通过升高反应温度、增加反应压力、特别是提高溶解液酸的浓度以提高纯铀的溶解反应速率。这需要反复的溶解实验才能获得可靠的条件数据,以保障在溶解过程中安全、快速的达到我们期望的要求。硝酸对铀的溶解过程中会产生大量的NO2和NO气体,溶解实验也是在高温(100~150℃)和较高压力(2~3atm)下进行,并且铀是放射性物质高温下的挥发会对环境造成放射性污染,所以,铀的溶解是在全密闭的金属容器中进行,溶解过程中严禁开盖取样收集数据。现有技术中缺乏能够在溶解过程中不 ...
【技术保护点】
1.一种铀箔溶解实验装置,其特征在于:包括溶解罐和取样器;所述取样器包括取样活塞、外壳、取样管和取样管控制阀门;所述取样管连接于所述外壳内部且与所述取样管控制阀门控制连接;所述外壳内部与所述取样器内腔密闭连接;所述取样活塞上设置有取样槽;所述取样活塞能够沿所述外壳内部移动以使所述取样槽伸入所述溶解罐取样或使所述取样槽退回所述外壳内部来连通所述取样管。
【技术特征摘要】
1.一种铀箔溶解实验装置,其特征在于:包括溶解罐和取样器;所述取样器包括取样活塞、外壳、取样管和取样管控制阀门;所述取样管连接于所述外壳内部且与所述取样管控制阀门控制连接;所述外壳内部与所述取样器内腔密闭连接;所述取样活塞上设置有取样槽;所述取样活塞能够沿所述外壳内部移动以使所述取样槽伸入所述溶解罐取样或使所述取样槽退回所述外壳内部来连通所述取样管。2.如权利要求1所述的铀箔溶解实验装置,其特征在于:所述取样器还包括复位弹簧、限位螺母和外密封螺帽;所述外密封螺帽安装于所述外壳外;所述限位螺母安装于所述取样活塞上;所述复位弹簧两端分别与所述限位螺母和外密封螺帽连接以使所述取样活塞复位;所述取样活塞穿过所述外密封螺帽与手柄连接。3.如权利要求2所述的铀箔溶解实验装置,其特征在于...
【专利技术属性】
技术研发人员:于宁文,罗志福,邓新荣,吴宇轩,沈亦佳,
申请(专利权)人:中国原子能科学研究院,
类型:发明
国别省市:北京,11
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