Patent ID: 7916825
Filing Date: 2011-03-29
Classification: G21C,Y02E

Abstract:
1. A fuel rod suitable for use in a nuclear fuel assembly, the fuel rod comprising: a cladding tube serving as a fuel rod body; a plurality of fuel pellets stacked inside the cladding tube; an upper end plug and a lower end plug each coupled to a top portion and a bottom portion of the cladding tube, respectively, the upper end plug and the lower end plug being configured to support the plurality of fuel pellets; and an elastic compression spring inserted into the cladding tube, the elastic compression spring being disposed between the upper end plug and the fuel pellets, and configured to support the fuel pellets by elastic force, wherein the elastic compression spring is of a hollow cylindrical shape; wherein the elastic compression spring is at least partially in contact with an inner circumferential surface of the cladding tube; wherein the elastic compression spring comprises: