Nuclear reactor

Claim 1

A NUCLEAR REACTOR ARRANGEMENT, CONPRISING A REACTION CHAMBER ADAPTED TO CONTAIN FUEL ELEMENTS OF FISSIONABLE MATERIAL AND IN WHICH STEAM IS PRODUCED BY EBULLITION OF WATER IN CONTACT WITH THE SURFACE OF SAID FUEL ELEMENTS, A DOME COMMUNICATING WITH AND SURMOUNTING SAID REACTION CHAMBER AND CONTAINING AN INERT GAS, A SEPARATOR COMMUNICATING WITH SAID DOME, A PRESSURE REDUCING VALVE BETWEEN SAID DOME AND SAID SEPARATOR, A HEAT ENGINE DRIVEN BY THE HEAT ENERGY IN THE VAPOR DEVOLOPED BY EBULLITION OF THE LIQUID IN THE DOME, PIPING FOR CONDUCTING THE VAPOR FROM SAID SEPARATOR TO SAID HEAT ENGINE, PIPING FROM THE SEPARATOR TO THE REACTION CHAMBER FROM REINTRODUCING INTO THE REACTION CHAMBER LIQUID COOLED BY EBULLITION IN THE DOME, A PUMP IN SAID PIPING CONTROLLING THE RATE OF CIRCULATION OF THE LIQUID THROUGH THE REACTION CHAMBER SO THAT THE MAXIMUM TEMPERATURE OF THE LIQUID IN THE REGION OF THE FUEL ELEMENTS REMAINS LESS THAN THE TEMPERATURE OF EBULLITION OF THE LIQUID UNDER THE CONDITIONS OF PRESSURE EXISTING IN THIS ZONE WHEREBY VAPOR PRODUCED BY CONTACT OF THE LIQUID WITH SAID FUEL ELEMENTS RAPIDLY CONDENSES IN THE LIQUID ADJACENT TO SAID FUEL ELEMENTS, PIPING INCLUDING A PUMP FOR CONDUCTING THE CONDENSATE FROM SAID HEAT ENGINE TO SAID PIPING FROM THE SEPARATOR, EACH OF SAID FUEL ELEMENTS OF FISSIONABLE MATERIAL BEING OF GENERALLY CYLINODRICAL FORM ENCLOSED IN AN EXTERNAL METAL CASING, THE SURFACE OF WHICH IS PROVIDED WITH A PLURALITY OF PROTURBERANCES, THE MEAN THICKNESS OF EACH PROTUBERANCE BEING OF SUBSTANTIALLY THE SAME ORDER OF DIMENSION AS ITS RADIAL HEIGHT AND THE PROTUBERANCES COVERING AT LEAST SUBSTANTIALLY 80% OF THE SURFACE OF THE FUEL ELEMENT.