Wear-reduction-sleeve for thimbles

Patent · Tue Dec 04 04:00:00 EST 1990

OSTI ID:5205017

Haslinger, K H; Porter, D S; Martin, M L; Higgins, W H

This patent describes a nuclear reactor having a core support plate with an annulus therein, a fuel assembly distribution-plate with an opening therein and spaced from the core support plate, an in-core-instrumentation thimble, a thimble guide tube, and a wear-reduction-sleeve for the in-core-instrumentation thimble, to curtail flow induced excitation in a region of thimble length which extends through the annulus and upwardly to and through the opening. It comprises: means for surrounding the thimble in the portion of its region of length in the annulus and substantially filling the annulus to increase support contact surface area; and means for collecting a major portion of thimble flow and diverting it radially away from the wear-reduction-sleeve and the opening.

• Assignee: Combustion Engineering, Inc., Windsor, CT (USA)
• Patent Number(s): US 4975241; A
• Application Number: PPN: US 7-226109
• OSTI ID: 5205017
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220400* -- Nuclear Reactor Technology-- Control Systems
DESIGN
EQUIPMENT PROTECTION DEVICES
FUEL ASSEMBLIES
IN CORE INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
PLATES
REACTOR INSTRUMENTATION
SUPPORTS
WEAR RESISTANCE