Research on nondestructive testing and evaluation method of heat transfer tube based on probability theory
International Journal of Development Research
Research on nondestructive testing and evaluation method of heat transfer tube based on probability theory
Received 13th March, 2020; Received in revised form 27th May, 2020; Accepted 11th June, 2020; Published online 24th July, 2020
Copyright © 2020, Jun-geWEN and Shang-kun REN. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
COVID-19 The integrity evaluation of heat transfer tubes is an important part of nuclear power safety. The capability evaluation of nondestructive testing is an inevitable requirement for the development of quality evaluation. On the basis of case analysis, two parameters of uncertainty (M) and detection credibility (N) are introduced to evaluate nondestructive testing capability. The uncertainty is expressed by the relative value of the difference between the detection failure probability and the real failure probability. Based on the theory of total probability, the mathematical relationship between the detection uncertainty and the parameters of missed detection rate and false detection rate is established. The detection credibility (N) is expressed by the average value of the sum of the detection rate P(A1/B1) of failure tube and the detection rate P(B1/A1) of the conditional failure tube. Based on Bayes formula, the mathematical model of the detection reliability, the missed detection rateand the false detection rate is established. The research results can provide a reference for the in-depth study of NDT capability evaluation technology.
