초록 ▼

A double container system for transporting and storing radioactive waste materials includes an inner storage container of steel for enclosing the radioactive material to be stored in a gas-tight manner and an outer shielding container which provides for the necessary shielding effect and mechanical

A double container system for transporting and storing radioactive waste materials includes an inner storage container of steel for enclosing the radioactive material to be stored in a gas-tight manner and an outer shielding container which provides for the necessary shielding effect and mechanical security with regard to handling and transportation. A neutron moderator layer is disposed in an annular gap between the outer shielding container and the inner storage container. The neutron moderate layer is made of hydrogen-bearing material, preferably polyethylene. In order to provide a good shielding effect while at the same time providing very good conduction of heat from the inside to the outside, the moderator layer includes individual rings of polyethylene which are stacked one above the other. Arranged between each two mutually adjacent ones of the polyethylene rings is a ring of a heat-conducting metal material having an H-profile when viewed in radial section. The legs of the H-profile ring embrace the sides of the two mutually adjacent polyethylene rings for fixing the latter in position.

대표청구항 ▼

A double container system for transporting and storing radioactive material such as irradiated nuclear fuel, the double container system comprising: an inner storage container made of steel for holding the radioactive material to be stored; an outer shielding container defining a cavity for accommod

A double container system for transporting and storing radioactive material such as irradiated nuclear fuel, the double container system comprising: an inner storage container made of steel for holding the radioactive material to be stored; an outer shielding container defining a cavity for accommodating said storage container therein; said shielding container having an inner surface and said storage container having an outer surface, said inner surface and said outer surface conjointly defining an annular gap therebetween; a neutron moderator assembly mounted in said annular gap, said moderator assembly including: a plurality of individual annular hydrogenous members made of hydrogenous material and stacked in said gap one above the other, each one of said annular hydrogenous members having two lateral sides facing said inner and outer surfaces, respectively; a plurality of mutually separate heat-conducting annular metal members having respective H-profiles when viewed in radial section; each of said annular metal members being disposed and stacked between each two mutually adjacent ones of the annular hydrogenous members; and, each of said metal having a horizontal web and four legs extending therefrom to define said H-profile and being placed between said mutually adjacent stacked annular hydrogenous members so as to cause said legs to at least partially enclose said lateral sides of said hydrogenous members.