Method for fixing a guide tube of a nuclear reactor fuel assembly
US4347966A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1980 |
| Grant date | Sep 7, 1982 |
| Priority date | — |
| Expiry date | Jun 9, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49945
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Method for fixing a zircalloy guide tube of a nuclear reactor fuel assembly to the steel end plate of said assembly, wherein the following stages are successively formed: PA1 the previously expanded end of the guide tube is engaged around a sleeve until it abuts against a first outer shoulder of said sleeves; PA1 said end is covered with a force-fitted ferrule and the tube is squeezed against the sleeve, then the upper end of the ferrule is welded to the sleeve above the said first outer shoulder; PA1 the sleeve--tube--ferrule assembly is introduced into an opening provided for this purpose in the end plate and having a shoulder, until a second outer shoulder of the sleeve abuts against the said shoulder of the end plate opening; PA1 the upper part of the sleeve is welded to the upper part of the opening of the end plate of the assembly. The invention also relates to an apparatus for fixing the zircalloy guide tube to the steel end plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.