Compagnie Europeenne Du Zirconium Cezus

Zircotube

Compagnie Europeenne Du Dirconium-cezus

Jean Drillon

Jean-Luc Aubin

A tubular blank ( ) is rolled on a mandrel ( ) in a pilgrim rolling mill. In a first rolling stage, a first part of the blank ( ) is rolled on a first part ( ) of the mandrel ( ), with a reduction of the outside diameter of the blank ( ) to the outside diameter of the guide tube and a reduction of the wall thickness of the blank ( ) to one of a first wall thickness (e ) and a second wall thickness (e ) exceeding the first wall thickness (e ). The mandrel ( ) is advanced in the axial direction. A second part of the blank ( ) is rolled on a second part ( ) of the mandrel spaced from the first part in the axial direction with a reduction of the outside diameter of the blank to the outside diameter of the guide tube and a reduction of the wall thickness of the blank ( ) to the other of the first wall thickness (e ) and second wall thickness (e ).

Process for producing a guide tube of a nuclear reactor fuel assembly, mandrel for forming the guide tube, and the guide tube obtained

Guide tube of a nuclear reactor fuel assembly

A tubular blank (22) is rolled on a mandrel (14) in a pilgrim rolling mill. In a first rolling stage, a first part of the blank (22) is rolled on a first part (18,19) of the mandrel (14), with a reduction of the outside diameter of the blank (22) to the outside diameter of the guide tube and a reduction of the wall thickness of the blank (22) to one of a first wall thickness (e1) and a second wall thickness (e2) exceeding the first wall thickness (e1). The mandrel (14) is advanced in the axial direction. A second part of the blank (22) is rolled on a second part (20,21) of the mandrel spaced from the first part in the axial direction with a reduction of the outside diameter of the blank to the outside diameter of the guide tube and a reduction of the wall thickness of the blank (22) to the other of the first wall thickness (e1) and second wall thickness (e2).

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Coueron, France

Jean Drillon