ALLOY AND TUBE FOR NUCLEAR FUEL ASSEMBLY

ALLOY AND TUBE FOR NUCLEAR FUEL ASSEMBLY

PROBLEM TO BE SOLVED: To provide a method for making tubes designed for a nuclear fuel pencil case or guide tube. SOLUTION: The tube is made from a bar of a zirconium based alloy, and contains 0.03 to 0.25 wt.% total of iron and chromium or vanadium, 0.8 to 1.3 wt.% niobium, ≤2,000 ppm tin, 500 to 2...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SENEVAT JEAN, MARDON JEAN-PAUL, CHARQUET DANIEL
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for making tubes designed for a nuclear fuel pencil case or guide tube. SOLUTION: The tube is made from a bar of a zirconium based alloy, and contains 0.03 to 0.25 wt.% total of iron and chromium or vanadium, 0.8 to 1.3 wt.% niobium, ≤2,000 ppm tin, 500 to 2,000 ppm oxygen, ≤100 ppm carbon, 5 to 35 ppm sulphur and ≤50 ppm silicon. The bar is soaked in water after being heated at 1,000°C to 1,200°C. The blank is extruded after being heated at 600 to 800°C, and is cold-rolled in at least four passes, to obtain a tube, and is performed with intermediate heat treatment at 560 to 620°C, and is performed with a final heat treatment at 560 to 620°C in inert atmosphere or under vacuum. COPYRIGHT: (C)2010,JPO&INPIT