Applying method of electrophysical diagnostics testing of uranium nitride under irradiation. (September 2017)

• Record Type: Journal Article
• Authors: Ryabikovskaya, E.; Surin, V.
• Is Part Of: Energy procedia. Volume 127(2017)
• Page Start: 3
• Page End: 10
• Publication Date: 2017-09
• Subjects: dense nuclear fuel -- NDT -- electrophysical diagnostics; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.08.085
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: The paper studies deformation of nitride fuel at an early irradiation stage with a functional electrophysical non-destructive diagnostic method. For this purpose, we measured relative thermoelectric voltage and voltage drops on the fuel surface under irradiation. Uranium nitride tests started at the self-heating temperature, which was gradually raised to 1, 500°C. Load was growing stepwise, from zero to 30 MPa. Signal structures were analyzed with discrete Fourier and wavelet transform algorithms. We build a deformation curve based on time dependence of thermoelectric voltage. The curve shows granular influence of changes in temperature and load. Accumulation of plastic strain increases internal stress until it reaches a critical point and relaxes, accompanied by spontaneous signal spikes.