Nuclear reactor fuel assembly

US4851187A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hans-Joachim Lippert · Hochstädt, DE
• Ahmet D. Ceylan · Nuremberg, DE

Key dates

• Filing date: Feb 16, 1988
• Grant date: Jul 25, 1989
• Expiry date: Feb 16, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E30/30
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A nuclear reactor fuel assembly includes a fuel assembly box. A head plate is disposed in the fuel assembly box. Fuel rods containing nuclear fuel are disposed in the fuel assembly box and guided in leadthroughs formed in the head plate, at least some of the fuel rods being secured in the head plate. A corner bolt stands on top of the head plate. A cross bar is disposed inside one of the corners at the upper end of the fuel assembly box on the corner bolt. An angle element is adapted to the fuel assembly box. Each of two leaf springs are disposed on an outer surface of the angle element at a respective one of the sides of the fuel assembly box and extend in longitudinal direction of the fuel assembly box. A screw bolt is firmly screwed to the fuel assembly box and the angle element at the corner bolt, the screw bolt has an expansion shaft with a reduced diameter, and a bolt head having two ends and being disposed on top of and supported on the angle element, the bolt head has an outer surface with an annular recess formed therein between the ends thereof defining a coaxial bolt head shaft with a reduced diameter, the bolt head shaft being disposed in a bore formed in the angle elem…