The process for producing a zirconium internally coated tubular blank of zircalloy - 2, suitable for the ultrasound measuring the thickness of the zirconium

摘要

The invention relates to a method of manufacture of a tubular blank zircaloy 2 pressed internally with zirconium and intended for the production of tubes - sheaths composite nuclear fuel. The internal zirconium cladding is made to be able to control the ultrasonic thickness by a suitable thermomechanical treatment with one or several stages of manufacture of said blank and whose purpose is to adjust the grain size according to the astm index between 9 and 12 on the ziraloy 2 and between 6 and 10 on the unalloyed zirconium in the same time preserving a difference in grain size between the zircaloy 2 and the unalloyed zirconium of at least 2 index astm.