Patent ID: 8268204

Claim:
A method for manufacturing an annular nuclear fuel pellet, the method comprising: preparing an annular nuclear fuel green compact whose lateral cross-section is a trapezoid; and sintering the annular nuclear fuel green compact under a reducing gas atmosphere to obtain the annular nuclear fuel pellet, wherein a thickness of the annular nuclear fuel green compact decreases along one direction of a central axis, and a green density of the nuclear fuel green compact increases along one direction of the central axis, wherein the sintered annular nuclear fuel pellet has a uniform inner diameter along the height of the pellet, and wherein the preparing of the annular nuclear fuel green compact comprises: inserting one of nuclear fuel powder or granules into a forming apparatus for forming a shape of the annular nuclear fuel green compact; and applying a single action uni-axial pressing for a high green density-intended surface to one of the inserted powder or granules.