公开(公告)号：US4050638A

公开(公告)日：1977-09-27

申请号：US570079

申请日：1975-04-21

申请人： Isao Ito ,  Yoichi Karita

发明人： Isao Ito ,  Yoichi Karita

IPC分类号： G21F7/06 ,  G21F9/02 ,  G21C19/14

CPC分类号： G21F7/061 ,  G21F9/02 ,  Y10S422/903

摘要： Maintenance apparatuses for and improvements in a radioactive matter containing waste gas treating installation, which is capable of completely carrying out waste gas cleaning by means of ceramic filter element is disclosed. The installation is provided with at least one of the following three apparatuses or devices, i.e.A ceramic filter element exchange apparatus which is capable of preventing radioactive contamination caused by scattering of radioactive dust at the time of inspecting or exchanging the filter element and preventing an operator from being subjected to radiation internal exposure as well as rapidly exchanging a spent filter element for a new one by remote control;A ceramic filter element treating apparatus which can pulverize the spent filter element by mechanical power instead of human power in a short time so as to considerably reduce the spent ceramic filter element in volume and change it into a form which can easily be solidified; andA device having a sealed joint structure which is capable of securing the filter element to a support plate in a reliable and sealed manner by remote control.

摘要翻译： 公开了能够通过陶瓷过滤元件完全进行废气净化的含有废气处理装置的放射性物质的维护装置和改进装置。 该装置设置有以下三个装置或装置中的至少一个，即

公开(公告)号：US5744020A

公开(公告)日：1998-04-28

申请号：US739955

申请日：1996-10-30

申请人： Takao Akiyama ,  Yoichi Miyamoto ,  Shunji Inoue ,  Yoshihiko Kurashima ,  Yoichi Karita

发明人： Takao Akiyama ,  Yoichi Miyamoto ,  Shunji Inoue ,  Yoshihiko Kurashima ,  Yoichi Karita

IPC分类号： G21C19/44 ,  C25B1/00 ,  C25B1/16 ,  G21F9/06 ,  G21F9/08 ,  G21F9/14 ,  G21F9/30

CPC分类号： G21F9/30 ,  G21F9/14 ,  G21F9/308

摘要： A process for treating a radioactive waste, includes drying a radioactive waste containing a radioactive substance(s) and a sodium compound(s), to convert it into a dried material, heating the dried material to convert it into a molten salt, and subjecting the molten salt to electrolysis using the salt as an anolyte and .beta.-alumina as a sodium ion-permeable membrane. This process can recover metallic sodium or sodium hydroxide, each of extremely low radioactivity from a radioactive waste containing a radioactive substance(s) and a sodium compound(s), at a high purity at a high current efficiency.

摘要翻译： 一种处理放射性废物的方法，包括干燥含有放射性物质和钠化合物的放射性废物，将其转化为干燥物质，加热干燥物质，将其转化为熔盐， 使用盐作为阳极电解液和β-氧化铝作为钠离子透过膜进行电解。 该方法可以以高电流效率从高纯度回收含有放射性物质和钠化合物的放射性废物的极低放射性的金属钠或氢氧化钠。