Patent Number: 
Section: claims

1. A nuclear reactor comprising a reactor vessel, nuclear fuel, a plurality of control rods, reactor coolant, at least one steam generator, a first pipe penetrating a wall of said reactor vessel and connected to a first inlet of said steam generator and at least one reactor coolant pump including a motor, said pump connected to a second inlet of said steam generator, wherein said nuclear fuel, said control rods, said reactor coolant, said steam generator and said reactor coolant pump including said motor are all located inside said reactor vessel, said pump comprising: a housing;  an annular stator disposed in said housing and having a generally cylindrical passage extending therethrough and a plurality of stator windings, said stator having energizing means for electrically connecting a source of electrical power to said plurality of stator windings;  an axial flow impeller assembly rotatably mounted in said generally cylindrical passage in said stator, said impeller assembly comprising an impeller and a sealed rotor mounted around the perimeter of said impeller and positioned inside said stator to form an electric motor, the operation of which rotates said impeller to produce a pressurized flow of fluid through said generally cylindrical passage;  at least one radial bearing mounted between said impeller assembly and said housing;  a thrust bearing mounted between said impeller assembly and said housing and located downstream from said rotor;  a shaft centrally positioned in said generally cylindrical passage in said housing and secured to said rotor;  said impeller assembly rotatably supported by said shaft; and  insulation material disposed within said stator, said insulation material comprising a plurality of solid pieces of mica, glass and ceramic insulation tightly packed within said stator. 2. The reactor of  claim 1 , further comprising a second pipe penetrating a wall of said reactor vessel, wherein said second pipe is connected to an outlet of said steam generator. claim 1 3. The reactor of  claim 2 , wherein six steam generators are located inside said reactor vessel. claim 2 4. The reactor of  claim 3 , wherein six reactor coolant pumps are located inside said reactor vessel and are each connected to an inlet of one of said six steam generators. claim 3 5. The reactor of  claim 4 , wherein said thrust bearing comprises a bearing runner and a pair of bearing pads. claim 4 6. A nuclear reactor comprising a reactor vessel, nuclear fuel, a plurality of control rods, reactor coolant, at least one steam generator, and at least one reactor coolant pump including a motor, said pump connected to the inlet of said steam generator, wherein said nuclear fuel, said control rods, said reactor coolant, said steam generator and said reactor coolant pump including said motor are all located inside said reactor vessel; said pump comprising: a housing;  an annular stator disposed in said housing and having a generally cylindrical passage extending therethrough and a plurality of stator windings, said stator having energizing means for electrically connecting a source of electrical power to said plurality of stator windings;  an axial flow impeller assembly rotatably mounted in said generally cylindrical passage in said stator, said impeller assembly comprising an impeller and a sealed rotor mounted around the perimeter of said impeller and positioned inside said stator to form an electric motor, the operation of which rotates said impeller to produce a pressurized flow of fluid through said generally cylindrical passage;  at least one radial bearing mounted between said impeller assembly and said housing;  a thrust bearing mounted between said impeller assembly and said housing and located downstream from said rotor;  a shaft centrally positioned in said generally cylindrical passage in said housing and secured to said rotor;  said impeller assembly rotatably supported by said shaft;  insulation material disposed within said stator, said insulation material comprising a plurality of solid pieces of insulation tightly packed within said stator; and  wherein said energizing means comprises a terminal gland capable of withstanding a pressure of approximately 2500 psi connected to an electrical power source, said terminal gland comprising a stainless steel body, said body attached to an alumina ceramic insulator by a first glass preform, said ceramic insulator attached to a terminal gland stud by a second glass preform.