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    • 1. 发明授权
    • Method for testing the radioactivity of objects containing metal or
concrete
    • 测试含有金属或混凝土的物体的放射性的方法
    • US5128266A
    • 1992-07-07
    • US543484
    • 1990-06-26
    • Jozef Hanulik
    • Jozef Hanulik
    • G01T1/16G01T1/167G01T7/06G21F9/28
    • G01T7/06Y10T436/25
    • Radioactively contaminated objects are placed into a borofluoric acid bath following a rough spot test and are precipitated in a measurable geometry on the cathode plates in the course of an electrolytic process, for example. In the course of the subsequent testing, the metals lying below a pre-determined maximum value of radioactive emissions are separated and supplied to the waste reclamation. The materials lying above this threshold value during the spot testing are first decontaminated and then placed in the acid bath. The borofluoric acid is not used up in this process and remains in the system. It is possible to use already radioactively contaminated boric acid from pressurized water reactors, to which it is merely required to add fluoric acid and to distill, for generating borofluoric acid. The method in accordance with the invention reduces the radioactive waste and reduces the testing and administrative effort required for the release of the non-radioactive materials.
    • 放射性污染的物体在粗糙点测试后放置在硼氟酸浴中,例如在电解过程中以可测量的几何形状沉积在阴极板上。 在随后的测试过程中,低于预定的放射性排放最大值的金属被分离并供应给废物回收。 在斑点测试期间超过该阈值的材料首先被净化,然后置于酸浴中。 该硼氟酸在该方法中不用完,并保留在系统中。 可以使用来自加压水反应器的已经放射性污染的硼酸,仅需要添加氟酸并蒸馏以产生硼氟酸。 根据本发明的方法减少了放射性废物,并减少了放射性物质释放所需的测试和管理工作。
    • 5. 发明授权
    • Beta particle monitor for surfaces
    • 表面的β粒子监视器
    • US5679958A
    • 1997-10-21
    • US607672
    • 1996-02-27
    • Duncan W. MacArthur
    • Duncan W. MacArthur
    • G01T7/06G01T1/185H01J47/02
    • G01T7/06
    • A beta radiation detector which is capable of reliably detecting beta radiation emitted from a surface. An electrically conductive signal collector is adjustably mounted inside an electrically conductive enclosure which may define a single large opening for placing against a surface. The adjustable mounting of the electrically conductive signal collector can be based on the distance from the surface or on the expected beta energy range. A voltage source is connected to the signal collector through an electrometer or other display means for creating an electric field between the signal collector and the enclosure. Air ions created by the beta radiation are collected and the current produced is indicated on the electrometer or other display means.
    • 一种能够可靠地检测从表面发射的β辐射的β辐射检测器。 导电信号收集器可调节地安装在导电外壳内,其可以限定用于放置在表面上的单个大开口。 导电信号收集器的可调整安装可以基于距表面的距离或预期的β能量范围。 电压源通过静电计或其它显示装置连接到信号收集器,用于在信号收集器和外壳之间产生电场。 收集由β辐射产生的空气离子,并且产生的电流在静电计或其他显示装置上指示。
    • 6. 发明授权
    • Radon detection
    • 氡检测
    • US5281824A
    • 1994-01-25
    • US864746
    • 1992-04-07
    • Duncan W. MacArthurKrag S. AllanderJohn A. Bounds
    • Duncan W. MacArthurKrag S. AllanderJohn A. Bounds
    • G01T7/06H01J47/02
    • G01T7/06Y10S250/02
    • A detector for atmospheric radon using a long range alpha detector as its sensing element. An electrostatic filter removes ions from ambient air, while allowing radon atoms to pass into a decay cavity. Here, radon atoms are allowed to decay, creating air ions. These air ions are drawn by a fan through a second electrostatic filter which can be activated or deactivated, and into the long range alpha detector. With the second electrostatic filter activated, no air ions are allowed to pass, and the signal output from the long range alpha detector consists of only the electronic background. With the second electrostatic filter deactivated, air ions and cosmic rays will be detected. The cosmic ray contribution can be minimized by shielding.
    • 使用长距离α检测器作为其感测元件的大气氡探测器。 静电过滤器从环境空气中除去离子,同时允许氡原子进入衰变腔。 这里,氡原子被允许衰变,产生空气离子。 这些空气离子被风扇吸引通过可被激活或去激活的第二静电过滤器和长距离的α检测器。 激活第二静电过滤器时,不允许空气离子通过,而从远程α检测器输出的信号仅由电子背景构成。 在第二静电过滤器停用时,将检测空气离子和宇宙射线。 宇宙射线的贡献可以通过屏蔽来最小化。