Patent Number: 
Section: claims

1. A nuclear power reactor comprising:a support frame;a plurality of power modules disposed within the support frame, each comprising a nuclear fuel and a power conversion system configured to convert heat generated from the nuclear fuel to electricity, the nuclear fuels of the plurality of power modules collectively forming a reactor core;a sleeve connected with the support frame and disposed between the plurality of power modules, the sleeve having a first end portion, a central portion, and a second end portion;a reactivity booster comprising a neutron source and being movable between the first end portion and the central portion of the sleeve;a reactivity quencher comprising a neutron absorber and being movable between the second end portion and the central portion of the sleeve;a plurality of movement controllers connected to the support frame and the plurality of power modules; anda plurality of module separators each connected to the sleeve and one of the plurality of power modules and extendable to move the one of the plurality of power modules away from the sleeve. 2. The nuclear power reactor of claim 1, wherein each of the power modules comprises a sealed housing enclosing the nuclear fuel and the power conversion system therein. 3. The nuclear power reactor of claim 1, further comprising a fuel cartridge configured to enclose the nuclear fuel, the fuel cartridge comprising an inlet and an outlet through which a coolant flows in and out, respectively, of the fuel cartridge. 4. The nuclear power reactor of claim 3, wherein the power conversion system comprises a compressor turbine proximal to the inlet of the fuel cartridge and a power turbine distal to the outlet of the fuel cartridge. 5. The nuclear power reactor of claim 1, wherein the movement controllers and the module separators are configured to move the plurality of power modules relative to one another to control a criticality of the reactor core. 6. The nuclear power reactor of claim 1, further comprising a radiation shield covering the first end portion of the sleeve. 7. The nuclear power reactor of claim 1, wherein the reactivity quencher comprises an internal recess adapted to receive the reactivity booster. 8. The nuclear power reactor of claim 1, wherein the module separator comprises a piston-cylinder assembly. 9. The nuclear power reactor of claim 1, wherein the module separator is automatically actuated when a parameter of the reactor core exceeds a predetermined value. 10. A nuclear power reactor comprising:a support frame;a plurality of power modules movably connected to the support frame through a plurality of movement controllers, each of the plurality of power modules comprising a nuclear fuel and a power conversion system configured to convert heat generated from the nuclear fuel to electricity, the nuclear fuels of the plurality of power modules collectively forming a reactor core;a sleeve disposed between the plurality of power modules, the sleeve being structurally connected to the support frame;a reactivity booster movably disposed in the sleeve and movable along the sleeve between an end portion and a central portion of the sleeve, the reactivity booster being adapted to provide a positive nuclear reactivity to the reactor core; anda plurality of module separators each connected to the sleeve and one of the plurality of power modules and extendable to move the one of the plurality of power modules away from the sleeve. 11. The nuclear power reactor of claim 10, wherein each of the power modules comprises a sealed housing enclosing the nuclear fuel and the power conversion system therein. 12. The nuclear power reactor of claim 10, further comprising a fuel cartridge configured to enclose the nuclear fuel, wherein the fuel cartridge comprises an inlet and an outlet through which a coolant flows in and out, respectively, of the fuel cartridge. 13. The nuclear power reactor of claim 10, further comprising a radiation shield covering at least the end portion. 14. The nuclear power reactor of claim 10, wherein the module separator is automatically actuated when a parameter of the reactor core exceeds a predetermined value. 15. A nuclear power reactor comprising:a support frame;a plurality of power modules movably connected to the support frame through a plurality of movement controllers, each of the plurality of power modules comprising a nuclear fuel and a power conversion system configured to convert heat generated from the nuclear fuel to electricity, the nuclear fuels of the plurality of power modules collectively forming a reactor core;a sleeve disposed between the plurality of power modules, the sleeve being structurally connected to the support frame;a reactivity quencher movably disposed in the sleeve and movable between a first end portion and a central portion of the sleeve, the reactivity quencher being configured to provide a negative nuclear reactivity to the reactor core; anda plurality of module separators each connected to the sleeve and one of the plurality of power modules and extendable to move the one of the plurality of power modules away from the sleeve. 16. The nuclear power reactor of claim 15, further comprising a reactivity booster movably disposed in the sleeve and movable along the sleeve between a second end portion and the central portion of the sleeve, wherein the reactivity quencher comprises an internal recess adapted to receive the reactivity booster.