Patent application number | Description | Published |
20110182394 | TOP NOZZLE FOR NUCLEAR FUEL ASSEMBLY HAVING SPRING INSERT HOLE IMPROVED IN FASTENING STABILITY AND METHOD OF MANUFACTURING THE SAME - A top nozzle for a nuclear fuel assembly and a method of manufacturing the top nozzle are provided. The top nozzle can include a coupling plate, a perimeter wall and a hold-down spring unit. The coupling plate can be coupled to a guide thimble of the nuclear fuel assembly. The perimeter wall can protrude upwards from the perimeter of the coupling plate. A spring clamp can be provided on the upper surface of the perimeter wall. The hold-down spring unit can be mounted to the upper surface of the perimeter wall in such a way to couple a corresponding end of the hold-down spring unit to the spring clamp. A fastening pin hole can be vertically formed through an upper surface of the spring clamp. A spring insert hole into which the hold-down spring unit can be inserted and formed by electro-discharge machining in an insert direction of the hold-down spring. | 07-28-2011 |
20110182395 | HOLD-DOWN SPRING UNIT FOR TOP NOZZLE OF NUCLEAR FUEL ASSEMBLY HAVING IMPROVED HOLD-DOWN PERFORMANCE AND TOP NOZZLE FOR NUCLEAR FUEL ASSEMBLY HAVING THE SAME - Disclosed herein is a hold-down spring unit for a top nozzle of a nuclear fuel assembly. The hold-down spring unit is coupled to the upper end of the top nozzle of the nuclear fuel assembly. The hold-down spring unit includes a first spring which acts against a hold-down force with respect to the nuclear fuel assembly under start-up conditions or hot full power conditions of a nuclear reactor, and a second spring which acts against a hold-down force with respect to the nuclear fuel assembly under start-up conditions of the nuclear reactor. The present invention reduces the hold-down margin under start-up conditions or hot full power conditions, thus enhancing the mechanical and structural stability of the nuclear fuel assembly. | 07-28-2011 |
20110182396 | GUIDE THIMBLE PLUG FOR NUCLEAR FUEL ASSEMBLY - A guide thimble plug for a nuclear fuel assembly is provided, in which an internal threaded hole is formed through a main body so that the main body is coupled to a bottom nozzle by a screw coupling. An upper insert part is formed in the upper end of the main body. The upper insert part is inserted into a shock absorption tube. A thermal deformation prevention part is formed on the main body below the upper insert part and is recessed inward from the outer surface of the main body such that, when the main body is coupled to the guide thimble, a gap is defined between the thermal deformation prevention part and the guide thimble. The guide thimble and the shock absorption tube can be reliably fastened to the bottom nozzle, and thermal deformation of the guide thimble can be minimized. | 07-28-2011 |
20120246933 | TOP NOZZLE FOR NUCLEAR FUEL ASSEMBLY HAVING SPRING INSERT HOLE IMPROVED IN FASTENING STABILITY AND METHOD OF MANUFACTURING THE SAME - A top nozzle is provided. The top nozzle can include a coupling plate, a perimeter wall and a hold-down spring unit. The coupling plate can be coupled to a guide thimble of the nuclear fuel assembly. The perimeter wall can protrude upwards from the perimeter of the coupling plate. A spring clamp can be provided on the upper surface of the perimeter wall. The hold-down spring unit can be mounted to the upper surface of the perimeter wall in such a way to couple a corresponding end of the hold-down spring unit to the spring clamp. A fastening pin hole can be vertically formed through an upper surface of the spring clamp. A spring insert hole into which the hold-down spring unit can be inserted and formed by electro-discharge machining in an insert direction of the hold-down spring. | 10-04-2012 |
20130003910 | HOLD-DOWN SPRING UNIT FOR TOP NOZZLE OF NUCLEAR FUEL ASSEMBLY, AND TOP NOZZLE FOR NUCLEAR FUEL ASSEMBLY EMPLOYING THE HOLD-DOWN SPRING UNIT - A hold-down spring unit for a top nozzle of a nuclear fuel assembly. The hold-down spring unit is coupled to the upper end of the top nozzle of the nuclear fuel assembly. The hold-down spring unit includes a first spring which provides a hold-down force upon the nuclear fuel assembly under start-up conditions or hot full power conditions of a nuclear reactor, and a second spring which provides an additional hold-down force upon the nuclear fuel assembly under start-up conditions of the nuclear reactor. The hold-down margin under start-up conditions or hot full power conditions is reduced, thus enhancing the mechanical and structural stability of the nuclear fuel assembly. | 01-03-2013 |
Patent application number | Description | Published |
20120175993 | WINDING FRAME WITH MAGMATE AND STATOR CORE WITH THE SAME - A stator core including at least two or more stator core-continuous bodies each formed by coupling at least two or more unit cores to each other, each unit core consisting of a tooth portion having a coupling slot and a coupling projection formed along both ends thereof and connected to adjacent unit core by means of a connection portion formed at each of both end portions of the tooth portion, wherein the at least two or more stator core-continuous bodies are fitting-connected to each other by means of the coupling slots formed at one side ends thereof and the coupling projections formed at the other side ends thereof to form the stator core having a round shape. | 07-12-2012 |
20130255070 | WINDING FRAME WITH MAGMATE AND STATOR CORE WITH THE SAME - The present invention relates to a stator core including at least two or more stator core-continuous bodies each formed by coupling at least two or more unit cores to each other, each unit core consisting of a tooth portion having a coupling slot and a coupling projection formed along both ends thereof and connected to adjacent unit core by means of a connection portion formed at each of both end portions of the tooth portion, wherein the at least two or more stator core-continuous bodies are fitting-connected to each other by means of the coupling slots formed at one side ends thereof and the coupling projections formed at the other side ends thereof to form the stator core having a round shape. | 10-03-2013 |
20130257217 | WINDING FRAME WITH MAGMATE AND STATOR CORE WITH THE SAME - The present invention relates to a stator core including at least two or more stator core-continuous bodies each formed by coupling at least two or more unit cores to each other, each unit core consisting of a tooth portion having a coupling slot and a coupling projection formed along both ends thereof and connected to adjacent unit core by means of a connection portion formed at each of both end portions of the tooth portion, wherein the at least two or more stator core-continuous bodies are fitting-connected to each other by means of the coupling slots formed at one side ends thereof and the coupling projections formed at the other side ends thereof to form the stator core having a round shape. | 10-03-2013 |
20150084476 | LAMINATED CORE OF MOTOR HAVING STRUCTURE SUITABLE FOR INSULATION COATING - Disclosed herein is a laminated core of a motor including: a first core sheet including a first rounded core base, a plurality of first teeth which are radially formed on the first core base, and first tooth ears formed at the end of each of the first teeth; and a second core sheet including a second rounded core base, a plurality of second teeth which are radially formed on the second core base, and second tooth ears formed at the end of each of the second teeth, the second core sheet having the same shape as the first core sheet but being smaller than the first core sheet, wherein the second core sheet is located at the lowermost part, one or more the first core sheets are laminated on the second core sheet, and another second core sheet is located at the uppermost part. | 03-26-2015 |