Patent Number: 
Section: claims

1. A fission reactor, comprising:a shell encompassing a reactor space having a longitudinal axis;an axial cylinder including an inner diameter surface defining a central longitudinal channel having an axis that is co-located with the longitudinal axis of the reactor space;a plurality of axially extending rings located within the reactor space and concentrically positioned relative to the axial cylinder, wherein the plurality of axially extending rings are radially separated forming, for any two adjacent axially extending rings, both a radially inward adjacent ring and a radially outward adjacent ring, and wherein an outer diameter surface of the radially inward adjacent ring and an inner diameter surface of the radially outward adjacent ring define an annular cylindrical space;a first plurality of primary axial tubes located circumferential within the annular cylindrical space, wherein each primary axial tube includes an inner diameter surface forming a primary channel and an outer diameter surface;a plurality of webbings, wherein the outer diameter surface of each of the plurality of primary axial tubes is connected to the radially inward adjacent ring by a first webbing and is connected to the radially outward adjacent ring by a second webbing;a plurality of secondary channels within the cylindrical space, wherein circumferentially adjacent primary axial tubes are separated by one of the plurality of secondary channels; anda fissionable nuclear fuel composition located in at least some of the plurality of secondary channels. 2. The fission reactor according to claim 1, wherein the fissionable nuclear fuel composition located in at least some of the plurality of secondary channels form a set of fissionable nuclear fuel elements that are volumetrically identical throughout the fission reactor. 3. The fission reactor according to claim 1, wherein a ratio of an area of a radial cross-section of the primary channels to an area of a radial cross-section of the secondary channels is constant throughout the fission reactor. 4. The fission reactor according to claim 1, wherein inner surfaces of the secondary channel include portions of the outer diameter surface of the circumferentially adjacent primary axial tubes, surfaces of the first webbing and the second webbing associated with each of the circumferentially adjacent primary axial tubes, and portions of the outer diameter surface of the radially inward adjacent ring and portions of the inner diameter surface of the radially outward adjacent ring. 5. The fission reactor according to claim 4, wherein the fissionable nuclear fuel composition is in thermal transfer contact with the inner surfaces of the secondary channel. 6. The fission reactor according to claim 1, wherein a primary coolant is flowable through the primary channel of each of the circumferentially adjacent primary axial tubes that are separated by one of the plurality of secondary channels which contain the fissionable nuclear fuel composition. 7. The fission reactor according to claim 1, wherein the circumferentially adjacent primary axial tubes are non-contactingly distributed within the annular cylindrical space. 8. The fission reactor according to claim 1, including a second plurality of primary axial tubes located circumferential between an inner diameter surface of the most radially inward, axially extending ring and an outer diameter surface of the axial cylinder, wherein the outer diameter surface of each of the second plurality of primary axial tubes is connected to the outer diameter surface of the axial cylinder by a first webbing and is connected to the most radially inward, axially extending ring by a second webbing. 9. The fission reactor according to claim 8, including a third plurality of primary axial tubes located circumferential between an inner diameter surface of the shell and an outer diameter surface of the most radially outward, axially extending ring, wherein the outer diameter surface of each of the third plurality of primary axial tubes is connected to the outer diameter surface of the most radially outward, axially extending ring by a first webbing and is connected to the inner diameter surface of the shell by a second webbing. 10. The fission reactor according to claim 9, wherein the shell, the axial cylinder, the plurality of axially extending rings, the plurality of primary axial tubes, and the plurality of webbings are an integral, unitary structure. 11. The fission reactor according to claim 10, wherein the shell, the axial cylinder, the plurality of axially extending rings, the plurality of primary axial tubes, and the plurality of webbings are formed from a metal alloy. 12. The fission reactor according to claim 1, wherein the shell, the axial cylinder, the plurality of axially extending rings, the plurality of primary axial tubes, and the plurality of webbings are an integral, unitary structure. 13. The fission reactor according to claim 12, wherein the shell, the axial cylinder, the plurality of axially extending rings, the plurality of primary axial tubes, and the plurality of webbings are formed from a metal alloy. 14. The fission reactor according to claim 1, including a reflector around an outer diameter surface of the shell. 15. The fission reactor according to claim 1, including at least one of a moderator, a control rod, and a scientific instrument is located in one or more primary channels. 16. The fission reactor according to claim 1, wherein the first plurality of primary axial tubes in each of the cylindrical space has a six-fold rotational symmetry relative to the longitudinal axis of the reactor space. 17. The fission reactor according to claim 1, wherein one or more of the central longitudinal channel of the axial cylinder and the primary channel of one or more of the primary axial tubes is accessible from an outer surface of the fission reactor. 18. The fission reactor according to claim 1, wherein the primary axial tube has a longitudinal axis that is parallel with the axis of the reactor. 19. The fission reactor according to claim 18, wherein the inner diameter surface of the primary axial tubes forming the primary channel varies as a function of axial position relative to the longitudinal axis of the primary axial tube. 20. The fission reactor according to claim 1, wherein the primary axial tubes are chambered. 21. The fission reactor according to claim 1, wherein a cross-section of the secondary channel perpendicular to the longitudinal axis has a shape of a cross-section of a hyperboloid of one sheet.