Fuel assembly inspection device, especially device for inspecting destructive fuel rods in undigested fuel assemblies of water-cooled nuclear reactors

摘要

Appts. for inspecting nuclear fuel elements, esp. for detecting defective fuel rods of a complete fuel element of a water-cooled reactor, comprises a water-filled vessel in which the fuel element is vertically mounted and a support carrying a number of parallel fingers each equipped with a detector can be moved horizontally so that the fingers penetrate from the side between the rows of fuel rods. This support with its fingers is mounted on a guide which is rigidly fixed inside the water-filled vessel relative to a housing for the fuel element itself. Thus the fingers are introduced between the fuel rods highly accurately. Each finger, if it encounters an obstruction, can move relative to the introducer appts.