Nuclear reactor green and sintered fuel pellets, corresponding fuel rod and fuel assembly

摘要

A sintered fuel pellet for a water nuclear reactor fuel rod including a peripheral wall extending along a central axis and two end faces. At least one of the end faces includes at least a first chamfer extending from the peripheral wall towards the central axis with a first non-zero slope with respect to a plane perpendicular to the central axis and a second chamfer extending from the first chamfer towards the central axis with a second non-zero slope with respect to a plane perpendicular to the central axis, wherein the first slope is different from the second slope.

主权项

1. A sintered fuel pellet for a water nuclear reactor fuel rod, the sintered fuel pellet comprising: a peripheral wall extending along a central axis; and two end faces, wherein at least one of the two end faces comprises at least a first chamfer extending from the peripheral wall towards the central axis having a first non-zero slope with respect to a first plane perpendicular to the central axis and a second chamfer extending from the first chamfer towards the central axis having a second non-zero slope with respect to the first plane perpendicular to the central axis, wherein the first slope is different from the second slope,
the at least one end face further includes a further surface, the second chamfer extending from an edge of the first chamfer to an edge of the further surface, the second chamfer protruding axially further than the first chamfer and the further surface to form a contact surface of the sintered pellet for contacting a neighboring pellet when sintered pellet and the neighboring pellet are superposed in a cladding to form a fuel rod, the further surface defining a dish-shaped recess extending from the second chamfer and around the central axis.