This study proposes to use extreme value analysis to characterize the uncertainty in estimating the wall thickness of carbon steel pipes by ultrasonic testing. The goodness of fit has been examined using experimental data measured from plate samples processed by corrosion test. A model is subsequently developed for predicting the failure probability of carbon steel pipes suffering wall thinning based on Bayesian theorem. In this model, the wall thinning rate predicted by KWU-KR model can be updated by offer...
英字タイトル:
Reliability analysis of pipes suffering wall thinning based on extreme value analysis of ultrasonic thickness measurement

This study reports the results of questionnaire survey to evaluate the attitudes of Laotian students towards energy. The survey was conducted at four high schools in three cities, including Vientiane capital, in Lao PDR in 2017, and also at the Faculty of Engineering, National University of Laos, in 2015-2017. The results of the survey were compared with earlier publications reporting the results of similar surveys targeting Japanese university students. The results revealed that Laotian students plac...
英字タイトル:
Questionnaire survey of the attitude of Laotian students aiming at the discussion on the factors affecting the public attitudes toward energy

This study performed finite element simulations to evaluate the applicability of a low-frequency eddy current nondestructive testing method for the detection of corrosions appearing in a double tank used in a reprocessing plant using a large diameter coil attached to the bottom of the tank. The simulations modeled the tank as an axisymmetric one, and evaluated the effect of various parameters such as frequency, coil radius and the gap between the inner and the outer vessels. The results of the simulations c...
英字タイトル:
Finite Element Evaluation of the Low Frequency Electromagnetic Method using a Large Exciter Coil for Monitoring the Corrosion of Double Tank in a Reprocessing Plant