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    System for discriminating radiation-contaminated fragments and apparatus for measuring radioactivity of fragments
    1.
    发明公开
    System for discriminating radiation-contaminated fragments and apparatus for measuring radioactivity of fragments 失效
    一种用于判别放射线污染片段和设备来测量片段的放射性系统。

    公开(公告)号：EP0374792A2

    公开(公告)日：1990-06-27

    申请号：EP89123383.5

    申请日：1989-12-18

    申请人： HITACHI, LTD.

    发明人： Kitaguchi, Hiroshi ,  Izumi, Shigeru ,  Yusa, Hideo ,  Kikuchi, Makoto

    IPC分类号： B07C5/346 ,  G01N23/12

    CPC分类号： B07C5/346 ,  Y10S241/38

    摘要： A system for discriminating radiation-­contaminated fragements (1) on the basis of a predeter­mined radioactive concentration includes a detection device (7) for detecting the radiation of the fragments (1), the detection device (7) having a path (88) of transfer of the fragments (1), at least one radiation detector (2) disposed at one of the inside and outside of said transfer path (88), and a transfer device (83; 90; 98) for sequentially transferring the fragments (1) in the transfer path (88); a convey device (42) for conveying the fragments (1) to said detection device (7); and a controller (100) for determining the radioactive concentration of the fragments (1) in accordance with the radiation detected by the detection device (7) and for judging whether or not the radioactive concentration of the fragments (1) is the predetermined radioactive concentration. The controller (100) is also operable to control the transfer device (83; 90; 95; 98) so as to adjust the speed of transfer of the fragments (1) in the transfer path (88). The system further includes a density detecting device (39) for detecting the density of the fragments (1) to be conveyed to the detection device (7). The controller (100) corrects the above determined radioactive concentration by the density detected by the density detecting device (39).

    摘要翻译： 一种用于判别放射线污染问包换（1）的预定放射性浓度的基础上，包括：一个检测装置（7），用于检测所述片段的辐射（1）中，检测装置系统（7），其具有的路径（88） 在内侧的一个和所述传输路径（88）的外侧设置在所述片段的转移（1），至少一个辐射检测器（2），和一个转移装置（83; 90; 98），用于顺序地传递环的片段（1 ）在传输路径（88）; 一个用于输送片段（1）至所述检测装置（7）传送装置（42）; 以及用于确定性采矿的控制器（100），在由所述检测装置（7）检测到的辐射雅舞蹈的片段（1）和用于判断是否该片段的放射性浓度的放射性浓度（1）在预定的放射性浓度 ， 所述控制器（100）因此，可操作用于控制所述传送装置（83; 90; 95; 98），以便调整在传输路径（88）的片段（1）的传输速度。 该系统包括用于检测所述片段（1）的密度的密度进一步检测装置（39）被输送到所述检测装置（7）。 所述控制器（100）通过由密度检测装置（39）检测到的密度来校正上述确定的开采放射性浓度。

    Radioactive waste treatment method
    9.
    发明公开
    Radioactive waste treatment method 失效
    放射性废物处理方法

    公开(公告)号：EP0198717A3

    公开(公告)日：1989-02-08

    申请号：EP86302829.6

    申请日：1986-04-16

    申请人： HITACHI, LTD.

    发明人： Izumida, Tatsuo ,  Yusa, Hideo ,  Funabashi, Kiyomi ,  Kikuchi, Makoto ,  Tamata, Shin

    IPC分类号： G21F9/16

    CPC分类号： G21F9/162

    摘要： The present invention relates to a method and an apparatus for producing a waste package of radioactive waste containing particles of radioactive waste material of low modulus of elasticity, particles of radioactive waste material of high modulus of elasticity, and a soldifying agent in which the particles of radioactive waste material of low modulus of elasticity and the particles of radioactive waste material of high modulus of elasticity are fixed in an almost uniformly dispersed state. According to this invention, the radioactive waste generated from nuclear power plants can be greatly reduced in volume and also a waste package of radioactive waste with high strength and excellent water resistance can be obtained.

    Method of and apparatus for pelletizing radioactive waste powder
    10.
    发明公开
    Method of and apparatus for pelletizing radioactive waste powder 失效
    为粉末状放射性废物造粒的方法和设备。

    公开(公告)号：EP0198447A2

    公开(公告)日：1986-10-22

    申请号：EP86105016.9

    申请日：1986-04-11

    申请人： HITACHI, LTD.

    发明人： Mizuno, Hiroko ,  Kikuchi, Makoto ,  Tamata, Shin ,  Ohashi, Satoru ,  Sakuraoka, Tadashi

    IPC分类号： G21F9/34 ,  B30B11/02

    CPC分类号： G21F9/34 ,  B30B11/025 ,  B30B15/0017 ,  Y10S100/903 ,  Y10S100/906 ,  Y10S425/812

    摘要： A method of and an apparatus for pelletizing a radioactive waste powder is disclosed. The apparatus includes a pelletizing section, and a pelletizing die (12) which has one end (12a) facing a powder receiving cavity (23) formed in the pelletizing section and the other end (12b) exposed to the atmosphere, and a through bore (12c) is so formed in the die as to pass from the one end (12a) to the other end (12b). A first pelletizing rod (13) can be inserted into and pulled out of the through bore (12c) from the one end (12a) of the die (12) through the cavity (23), and a second pelletizing rod (8) can be inserted into and pulled out of the through bore (12c) from the other end (12b) of the die (12). The first and second rods (13, 8) are arranged such that, when the second rod (8) takes a predetermined position in the through bore (12c), the first rod (13) is inserted through the receiving cavity (23) into the through bore (12c), thereby enabling the pelletizing operation of the powder (1) within the through bore (12c). The structure is adopted for allowing air compressed in the through bore (12c) to be discharged into the cavity (23) without causing the compressed air to leak into the atmosphere during the pelletizing operation.