Hold-down spring clamps on fuel assembly top nozzle

Patent · Tue Jul 03 04:00:00 EDT 1990

OSTI ID:6564017

Rylatt, J A

This paper describe a fuel assembly having a top nozzle and a hold-down device including spring assemblies mounted on the top nozzle and having base ends with holes therethrough alignable with holes in the top nozzle, a pair of improved spring clamp assemblies on the top nozzle for retaining the spring assemblies thereon. It comprises: a clamp block formed integrally with a top portion of the top nozzle at each of a pair of diagonal corners thereof; the clamp block having a pair of interconnected clamp slots formed therein for insertion of a pair of the spring assemblies of the base ends thereof and a pair of internally threaded bores formed therein; each clamp slot being formed in the clamp block with interconnected openings at front and outer sides thereof, and a pair of fasteners each for installing and fastening through one of the bores defined in the clamp block; the each fastener having an end being in the one hole in the top nozzle and an externally threaded head spaced from the end and being threadable within the one internally threaded bore of the clamp block for fastening and clamping the one spring assembly at the base end thereof between the clamp block and the top nozzle.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA (USA)
• Patent Number(s): A; US 4938919
• Application Number: PPN: US s 7-319590
• OSTI ID: 6564017
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220300* -- Nuclear Reactor Technology-- Fuel Elements
DESIGN
FASTENERS
FUEL ASSEMBLIES
MACHINE PARTS
NOZZLES
SPRINGS