Patent ID: 6518585
Filing Date: 2003-02-11
Classification: G21F

Abstract:
A method for manufacturing a container for transportation and storage of radioactive material, having the following steps:1.1 an inner tube of metal is placed into an outer tube of metal in such a manner that an annular gap of a constant width is formed between the inner and the outer tubes, 1.2 the annular gap is then filled with an aggregate or a mixture of aggregates, the minimum grain size of which is 2 mm and the maximum grain size of which is 20 mm, at least 95% by wt. of the aggregate having a bulk density>4.2 g/cm3, 1.3 afterwards, a suspension of cement, water and liquefier is injected under high pressure into the annular gap through at least one opening at the bottom end of the inner and/or the outer tube until the suspension reaches the upper end of the outer tube in filling the gores existing between the aggregate totally, 1.4 the suspension being adjusted in such a manner that the concrete being formed together with the aggregate has a bulk density>4,100 g/cm3 and the set cement together with the aggregate within the annular gap has a compressive strength of concrete according to DIN 1048, part 2 of >45 N/mm2 after 28 days.