skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Welding fixture for nuclear fuel pin cladding assemblies

Abstract

A welding fixture is described for locating a driver sleeve about the open end of a nuclear fuel pin cladding. The welding fixture includes a holder provided with an open cavity having shoulders for properly positioning the driver sleeve, the end cap, and a soft, high temperature resistant plastic protective sleeve that surrounds a portion of the end cap stem. Ejected contaminant particles spewed forth by closure of the cladding by pulsed magnetic welding techniques are captured within a contamination trap formed in the holder for ultimate removal and disposal of contaminating particles along with the holder.

Inventors:
;
Publication Date:
Research Org.:
Westinghouse Hanford Co., Richland, WA (USA)
OSTI Identifier:
5056540
Application Number:
ON: DE85006416
Assignee:
Dept. of Energy ERA-11-002634; EDB-85-182250
DOE Contract Number:
AC06-76FF02170
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; FUEL FABRICATION PLANTS; WELDING MACHINES; FUEL PINS; REMOTE HANDLING EQUIPMENT; FUEL CANS; EQUIPMENT; FUEL ELEMENTS; MATERIALS HANDLING EQUIPMENT; NUCLEAR FACILITIES; REACTOR COMPONENTS; 220300* - Nuclear Reactor Technology- Fuel Elements; 050700 - Nuclear Fuels- Fuels Production & Properties

Citation Formats

Oakley, D.J., and Feld, S.H. Welding fixture for nuclear fuel pin cladding assemblies. United States: N. p., 1984. Web.
Oakley, D.J., & Feld, S.H. Welding fixture for nuclear fuel pin cladding assemblies. United States.
Oakley, D.J., and Feld, S.H. 1984. "Welding fixture for nuclear fuel pin cladding assemblies". United States. doi:.
@article{osti_5056540,
title = {Welding fixture for nuclear fuel pin cladding assemblies},
author = {Oakley, D.J. and Feld, S.H.},
abstractNote = {A welding fixture is described for locating a driver sleeve about the open end of a nuclear fuel pin cladding. The welding fixture includes a holder provided with an open cavity having shoulders for properly positioning the driver sleeve, the end cap, and a soft, high temperature resistant plastic protective sleeve that surrounds a portion of the end cap stem. Ejected contaminant particles spewed forth by closure of the cladding by pulsed magnetic welding techniques are captured within a contamination trap formed in the holder for ultimate removal and disposal of contaminating particles along with the holder.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1984,
month = 2
}
  • A welding fixture for locating a driver sleeve about the open end of a nuclear fuel pin cladding. The welding fixture includes a holder provided with an open cavity having shoulders for properly positioning the driver sleeve, the end cap, and a soft, high temperature resistant plastic protective sleeve that surrounds a portion of the end cap stem. Ejected contaminant particles spewed forth by closure of the cladding by pulsed magnetic welding techniques are captured within a contamination trap formed in the holder for ultimate removal and disposal of contaminating particles along with the holder.
  • A non-metallic welding fixture is described for holding a driver sleeve, a nuclear fuel pin end cap with stem and the open end of a length of nuclear fuel pin cladding in precise positions relative to one another for closure welding with the driver sleeve coaxially fitted about the end cap and cladding. The fixture consists of: a rod-shaped holder having a longitudinal cavity extending inwardly from one axial end of the holder; means within the cavity of the rod-shaped holder for coaxially locating the end cap, the driver sleeve and the fuel pin cladding in required longitudinal positions relativemore » to one another; and contamination trap means within the cavity of the rod-shaped holder adapted to be located about the end cap stem for retaining contaminant particles ejected axially from the cladding during closure about the end cap.« less
  • A welding fixture for a nuclear fuel assembly grid having rigid top and bottom members and having apparatus for releasably securing them together. The bottom and top members each have an egg-crate configuration of interleaved fixture straps. Top notches on the bottom fixture straps' top edges are placed to engage the grid straps' bottom edges when the grid straps are aligned for welding. Likewise, bottom notches on the top fixture straps' bottom edges are placed to engage the grid straps' top edges when the grid straps are aligned for welding.
  • This patent describes an automated apparatus for welding a separate end plug to one open end of each of a succession of nuclear fuel cladding tubes and for inspecting each end plug weld. The apparatus comprising, in combination: a welding station; a cooldown station for cooling each end plug weld in an inert gas atmosphere; a serial number reader station for reading a serial number on each end plug; a first weld inspection station; a second weld inspection station for generating second weld inspection data; a computer system linked with the serial number reader and the first and second weldmore » inspection stations; an input queue for holding a plurality of tubes; a tube transporter for periodically picking individual tubes from the input queque and conveying the tubes in a direction transverse to their tube axis in indexing steps to index positions respectively axially aligned with the welding, serial number reader, and first and second weld inspection stations; and a sorter positioned at an output end of the tube transporter.« less
  • Disclosed is a method of welding tabs projecting outwardly from grip straps in a fuel assembly grid to a control rod guide thimble positioned in a cell in the grid including providing a weld guide having openings therein which receive dimples on the strap when the weld guide is placed in a cell adjacent to the cell containing the control rod guide thimble. The weld guide includes an opening which falls into alignment with a tab so that when a welding gun electrode is placed through the opening and into contact with a tab, the other electrode is automatically centeredmore » on its tab thus permitting accurate spot welding of the parts. To make a second spot weld on the same tab but at a point outwardly from the first spot weld, a second weld guide having an opening therein displaced a greater distance from a reference point on the weld guide, is placed in the same cell and the welding process repeated.« less