Method for manufacturing sintered annular nuclear fuel pellet without surface grinding

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.