What is claimed is:

1. Device for shielding against radiation with a wall structure which surrounds a space which is to be shielded against the radiation, characterized in that the wall structure (13, 32, 4, 15) forms a spherical jacket (3) which is located underneath the earth's surface.

2. Device as claimed in claim 1, wherein there is a bed (5, 74) which is located roughly in the center of the spherical space.

3. Device as claimed in claim 1 or 2, wherein the wall structure is connected to five bars (7), wherein four bars (7) are located roughly in one plane and on axes which intersect one another roughly at a right angle and which are located roughly horizontally, wherein the fifth bar (7) points vertically down from the jacket (3) and is located on an axis which is aligned to the plane of the four first bars (7) at a right angle, and wherein the axes (7) intersect in the center of the jacket (3).

4. Device as claimed in claim 2 and 3, wherein in the plane of the bars (7) within the jacket (3) there is a floor plate (11) to which the bed (5, 74) is attached.

5. Device as claimed in one of claims 2 to 4, wherein the bed (5, 74) consists of a trough (16) and a cover (18), the cover (18) being supported via springs (8) on the trough (16).

6. Device as claimed in claim 5, wherein the trough (16) and the cover (18) consist of gold-plated copper.

7. Device as claimed in claim 5, wherein the springs (8) consist of bronze and are coated with silver.

8. Device as claimed in one of claims 1 to 7, wherein the wall structure consists of a lattice-like structure of bars (13, 32; 45, 46, 47).

9. Device as claimed in claim 8, wherein the lattice-like structure on its outside is provided with copper plates (14) which are coated with a layer of silver and palladium and on its inside with copper plates.

10. Device as claimed in one of claims 1 to 9, characterized by a passage to the spherical jacket (3), with a section (2) which extends in the shape of an arc around the spherical jacket (3) and a straight section (10) which extends radially to the spherical sleeve (3) and the latter opens.