Long term storage container and manufacturing method

Abstract

A method for manufacturing a long-term storage container for storage of radioactive material to inhibit radioactive radiation therefrom, said container having a bottom and upright wall extending therefrom, the top of said container to be closed by a screw-on radioactive radiation inhibiting lid, said container having an integral inner container part of plastic material with a bottom and upright wall, an integral outer container part of plastic material with a bottom and upright wall, and radioactive radiation inhibiting material in an inter space between the walls and bottoms of said inner and outer container parts. To fill the inter space an inter space container part is integrally molded through injection or pressure molding and then fitted to either the inner container part to subsequently mold the outer container part, or fitted inside the outer container part to subsequently mold the inner container part.

1 . A storage container for long-time storage of radioactive material and to inhibit radioactive radiation therefrom, said container having a bottom and upright wall extending therefrom, the top of said container configured to receive and be closable by a separate radioactive radiation inhibiting screw-on lid, said storage container comprising:
 an integral inner container part of plastic material with a bottom and upright wall,   an integral outer container part of plastic material with a bottom and upright wall, and   a radioactive radiation inhibiting material in an inter space between the walls and bottoms of said inner and outer storage container part, respectively,   wherein said radioactive radiation inhibiting material is in the form of a separately molded, integral interspace container having a bottom and an upright wall extending therefrom, and   wherein said outer container part is a storage container part molded onto an outside face of the upright wall and bottom of the interspace part when the interspace container part is fitted with an inside face of its upright wall and bottom onto a respective outside face of the upright wall and bottom of the inner container part.   
   
   
       2 . A storage container according to  claim 1 , wherein the storage container part on an outside face of the outer container part has threads configured to engage threads on said lid, and wherein the outer container part has locking means for non-releasable locking engagement with a locking member on said lid when said lid is fully screwed onto the storage container. 
   
   
       3 . A storage container according to  claim 1 , wherein said radioactive radiation inhibiting material is one of: lead and lead alloy. 
   
   
       4 . A storage container according to  claim 1 , wherein said plastic material is high density polyethylene. 
   
   
       5 . The storage container of  claim 1 , wherein the inter space container part of said radioactive radiation inhibiting material is cast by pressure molding. 
   
   
       6 . The storage container of  claim 1 , wherein the inter space container part of said radioactive radiation inhibiting material is cast by injection molding.