Method for fixing a spring package to a top nozzle in a fuel assembly of a nuclear power reactor

Patent · Tue May 25 04:00:00 EDT 1993

OSTI ID:6481254

Oehman, U

A method of fixing a spring package to a top nozzle of a fuel assembly of a nuclear reactor so as to press the fuel assembly against the bottom of the reactor core of the nuclear reactor, the fuel assembly including fuel rods, guide tubes and spacers arranged in a bundle between a top nozzle and a bottom nozzle, the method is described including the steps of: (a) welding a clamp to the top nozzle, (b) milling out a T-shaped slot in the clamp for receiving one end of the spring package with a close fit, (c) inserting said one end of the spring package into the slot and (d) fixing said one end of the spring package in the slot with a locking pin such that all moment forces from the spring package are taken up by the clamp and no moment forces are applied to the locking pin.

• Assignee: ABB Atom AB, Vaesteraa (Sweden)
• Patent Number(s): US 5213757; A
• Application Number: PPN: US 7-863566
• OSTI ID: 6481254
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
FABRICATION
FASTENERS
FUEL ASSEMBLIES
FUEL ELEMENTS
FUEL RODS
GUIDE TUBES
INSTALLATION
JOINING
MACHINE PARTS
NOZZLES
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POSITIONING
POWER PLANTS
REACTOR COMPONENTS
REACTOR CORES
SPACERS
SPRINGS
THERMAL POWER PLANTS
TUBES
WELDING