RU2002111557A - ZIRCONIUM ALLOY AND METHOD FOR PRODUCING AN ELEMENT FOR FUEL ASSEMBLY OF A NUCLEAR REACTOR FROM SUCH ALLOY - Google Patents

Claims (7)

1. An alloy based on zirconium also containing, by weight, apart from unavoidable impurities, 0.02-1% Fe, 0,8-2,3% niobium, less than 2000 million ^-1, tin, less than 2000 million ^-1, oxygen , less than 100 mn ^-1, carbon, 5-35 million ^-1, sulfur and less than 0.25% in total of chromium and / or vanadium, the ratio R between the content of niobium and 0.5% iron supplemented, in the case of if necessary, the content of chromium and / or vanadium is below 3. 2. The alloy according to claim 1, also containing 0.8-1.1 wt.% Niobium, 0.3-0.35 wt.% Iron, 0.15-0.20 wt.% Tin, 0.01- 0.1 wt.% chromium and / or vanadium, 1000-1600 million oxygen ^{-1, -1} 5-35 million of sulfur and less than 100 mn ^-1 carbon. 3. The alloy of claim 1 containing ^-1 1000-1600 million oxygen. 4. The sealing pipe of the alloy according to claims 1, 2 or 3 in a recrystallized state. 5. Alloy sheet metal according to claims 1, 2 or 3 in a recrystallized state. 6. Use of an alloy according to any of claims 1, 2 or 3 for the manufacture of elements of a nuclear reactor pressurized water containing initially less than 5 million ^-1 lithium. 7. A method of manufacturing pipes designed to form the whole or outer part of the shell of a nuclear fuel rod or a guide pipe for fuel assembly of a nuclear reactor, characterized in that a bar is made of an alloy based on zirconium, which also contains, by weight, in addition to unavoidable impurities, 0, 02-1% iron, 0,8-2,3% niobium, less than 2000 million ^-1 tin, less than 2000 million oxygen ^-1, less than 100 mn ^-1 carbon, 5-35 million ^-1 sulfur and less than 0.25% in general chromium and / or vanadium, and the ratio of R between the niobium content minus 0.5% and the iron content is supplemented , if necessary, the chromium and / or vanadium content is below 3, after heating to a temperature of 1000-1200 ° C, the beam is subjected to rapid cooling with water, after heating to a temperature of 600-800 ° C, the workpiece is drawn, the above workpiece is cold rolled , by at least two passes, to obtain a pipe when performing intermediate heat treatments at a temperature of 560-620 ° C, and carry out the final heat treatment at a temperature of 560-620 ° C, and the combination of heat treatments is carried out in mercury atmosphere or in a vacuum.