Side-slotted nozzle type double sheet spacer grid for nuclear fuel assemblies

摘要

A spacer grid for nuclear fuel assemblies comprises inner strips intersecting each other at a predetermined angle to form four-walled cells to receive and support fuel rods in the spacer grid. Each inner strip comprises unit strip parts formed in integrating two unit sheet parts together into a single structure, such that unit sheet parts face each other and nozzle type coolant channel with inlet and outlet is defined between unit sheet parts. A side slotted nozzle type double sheet spacer grid (310) for nuclear fuel assemblies, comprises inner strips (316) intersecting each other at a predetermined angle to form four-walled cells to receive and support fuel rods (325) in the spacer grid. Each inner strip comprises unit strip parts each fabricated in integrating two unit sheep parts together into a single structure, such that the two unit sheet parts face each other and nozzle type coolant channel with an inlet and an outlet is defined between the two unit sheet parts. Each of the unit sheet parts is provided with a slot longitudinally formed on each side surface of a spring which is projected from the unit sheet part to support a fuel rod within a four-walled cell.