Patent Number: 
Section: claims

1. A radioisotope generation system comprising:a tube subsystem configured to permit insertion and removal of at least one irradiation target into an instrumentation tube of a nuclear reactor;an irradiation target drive subsystem configured to insert and remove the at least one irradiation target from the instrumentation tube of the nuclear reactor; andan irradiation target storage and removal subsystem configured to store the at least one irradiation target,wherein the irradiation target drive subsystem is configured such that the at least one irradiation target passes between a first gear and a second gear. 2. The system of claim 1, wherein the tube subsystem includes a sleeve inserted into the instrumentation tube, the sleeve having a substantially constant inner diameter. 3. The system of claim 2, wherein the sleeve is modular. 4. The system of claim 2, wherein the tube subsystem further includes at least one collet shaped to couple with the sleeve and a variable inner surface of the instrumentation tube. 5. The system of claim 2, wherein the sleeve extends past an opening in the instrumentation tube to the irradiation target drive subsystem. 6. A radioisotope generation system comprising:a tube subsystem configured to permit insertion and removal of at least one irradiation target into an instrumentation tube of a nuclear reactor;an irradiation target drive subsystem configured to insert and remove the at least one irradiation target from the instrumentation tube of the nuclear reactor; andan irradiation target storage and removal subsystem configured to store the at least one irradiation target,wherein the irradiation target drive subsystem includes a plurality of gears, each of the gears positioned and having surfaces shaped to fit with the at least one irradiation target. 7. The system of claim 6, wherein the plurality of gears includes a first gear and a second gear, the first and second gears configured to synchronously rotate in opposite directions by a shared gear system. 8. The system of claim 1, wherein the irradiation target storage and removal subsystem includes a holding tube, a makeup tube, and a removal mechanism configured to remove from the system irradiation targets that have been removed from the instrumentation tube. 9. The system of claim 8, wherein the removal mechanism includes a push bar, shaft, and drive wheel. 10. A radioisotope generation system comprising:a tube subsystem configured to permit insertion and removal of at least one irradiation target into an instrumentation tube of a nuclear reactor;an irradiation target drive subsystem configured to insert and remove the at least one irradiation target from the instrumentation tube of the nuclear reactor; andan irradiation target storage and removal subsystem configured to store the at least one irradiation target,wherein the irradiation target storage and removal subsystem includes a holding tube, a makeup tube, and a removal mechanism configured to remove from the system irradiation targets that have been removed from the instrumentation tube,wherein the removal mechanism includes a push bar, shaft, and drive wheel, andwherein the removal mechanism is powered by a shared gear system and synchronized with the irradiation target drive subsystem. 11. The system of claim 8, wherein the irradiation target storage and removal subsystem is connected to a reservoir holding a plurality of irradiation targets and is configured to feed the irradiation targets from the reservoir into the irradiation target drive subsystem. 12. The system of claim 11, wherein the irradiation targets are driven by gravity through the irradiation target storage and removal subsystem into the irradiation target drive subsystem. 13. The system of claim 12, wherein the irradiation target storage and removal subsystem further includes a flow control mechanism that selectively prevents the irradiation targets from being driven by gravity into the irradiation target drive subsystem. 14. The system of claim 1, wherein a linear order of the at least one irradiation target is preserved throughout the system. 15. The system of claim 1, wherein the at least one irradiation target includes a shell and a hollow portion. 16. The system of claim 1, wherein the tube subsystem is configured such that the at least one irradiation target moves vertically through the instrumentation tube. 17. The system of claim 2, wherein the irradiation target drive subsystem is configured such that the sleeve passes between the first gear and the second gear. 18. The system of claim 2, wherein the sleeve has an outer diameter that increases along a length of the sleeve.