SEDL / STP / STP1023-EB / STP18877S

Automatic System for Measuring the Zirconium Liner and Zircaloy-2 Thickness of Zirconium Liner Tubes

Honji, M
Manager and engineers, Steel Tube Works, Sumitomo, Metal Industries, Ltd., Amagasaki,

Sakamoto, T
Assistant manager, Sumitomo Metal Industries, Ltd., Amagasaki,

Morimoto, Y
Manager and engineers, Steel Tube Works, Sumitomo, Metal Industries, Ltd., Amagasaki,

Hyodo, S
Manager and engineers, Steel Tube Works, Sumitomo, Metal Industries, Ltd., Amagasaki,

Pages: 11    Published: Jan 1989

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Abstract

An automatic system to measure the zirconium liner thickness and Zircaloy-2 thickness of Zircaloy tubes with a zirconium liner for nuclear reactors has been developed. This system uses an electromagnetic probe connected to a data processing unit for measuring the liner thickness, an ultrasonic inspection system for measuring the wall-thickness, and a computer for calculating the Zircaloy-2 thickness from the liner thickness and wall-thickness. Fully automatic measurements on zirconium liner thickness and Zircaloy-2 thickness are performed with high accuracy to an order of 2μm. This newly developed system is very useful in assuring the liner layer and Zircaloy-2 thickness in the production of high-quality cladding tubes.