Storage of hazardous materials

1 . A method for the encapsulation of a nuclear material, comprising:

treating the nuclear material with an encapsulant which comprises a cementitious material; and

curing said cementitious material;

wherein said nuclear material comprises uranium metal, Magnox fuel elements, and/or fuel element debris.

2 . (canceled)

3 . A method as claimed in claim 1 wherein the cementitious material comprises Portland Cement.

4 . A method as claimed in claim 1 wherein the cementitious material further comprises at least one inorganic filler, the at least one inorganic filler comprising blast furnace slag, pulverised fuel ash, hydrated lime, finely divided silica, limestone flour and/or organic and inorganic fluidising agents.

5 . A method as claimed in claim 1 wherein the cementitious material is provided in the form of an aqueous composition.

6 . A method as claimed in claim 5 wherein the water content of the composition is about 40-50% (w/w).

7 . A method as claimed in claim 1 further comprising:

placing the nuclear material in a container before treating the nuclear material and curing the cementitious material.

8 . A method as claimed in claim 7 wherein elements of the nuclear material are either arrayed in the container or mixed haphazardly.

9 . A method as claimed in claim 7 further comprising:

capping the container after the cementitious material has at least partially cured.

10 . A method as claimed in claim 7 wherein the container comprises a drum having a capacity of about 500 litres.

11 . A method as claimed in claim 10 wherein an amount of nuclear material stored in the container is up to about 52 elements.

12 . A method as claimed in claim 11 wherein the number of elements is about 22.

13 . A method of storing a nuclear material comprising:

encapsulating the nuclear material in a cured cementitious material, wherein said nuclear material comprises uranium metal, Magnox fuel elements, and/or fuel element debris.