The Use of Accelerator Techniques to Study Irradiation Damage
Authors: Dutton, R.; Lim, C. S.
Source: Canadian Metallurgical Quarterly, Number 2, April-June 1986 , pp. 169-180(12)
Publisher: Maney Publishing
Abstract:The modification of microstructure and the concomitant changes in mechanical properties associated with irradiation damage in zirconium are described, with reference to the CANDU™ reactor. The engineering problems arise from irradiation-induced deformation of the fuel channel components, comprising the pressure tubes and the calandria tubes. To ensure a useful lifetime for these components, the design engineer must have accurate, predictive, design equations that relate plastic strain to the major variables. The design equations rely on an empirical data base. However, extrapolations beyond the envelope of such data depend on a knowledge of the underlying mechanisms. Recent developments in the understanding of these are briefly reviewed. Emphasis is placed on the recent development of experimental techniques based on the use of an accelerator as a source of irradiation. Thus, at the Whiteshell Nuclear Research Establishment, a dedicated 5 MeV Van de Graaff accelerator, operating primarily in the proton mode, is currently being adapted to study irradiation damage effects. The development of a target rig that will measure macroscopic creep and growth strains in a tensile specimen is described. The advantages over in-reactor experiments are in the area of improved experimental control. This facility is described, some preliminary results presented and future experimental plans outlined.
Document Type: Research Article
Publication date: 1986-04-01