配管減肉試験での肉厚連続モニタリング手法の性能確認(保全・設備診断技術,<特集>第13回動力・エネルギー技術シンポジウム)

概要

論文の詳細を見る
Recently, wall-thinning problems of piping in power plants induced by high temperature water or a two-phase (high temperature water and steam) flow attract attentions. Since the wall thinning mechanism was not fully understood, a new test facility was constructed to evaluate a long-term wall thinning of piping under two-phase flow conditions. Using this facility, the wall-thinning tests of carbon steel pipes was carried out. The changes in wall thickness during the test period were realtime monitored using an ultrasonic sensor for high temperature applications. During the two months of the test period, the monitored pipe thickness kept decreasing steadily. The difference between the monitoring result and the actual thickness measured after testing was confirmed to be small. It is concluded, therefore, that this monitoring system is effective for wall thinning monitoring of high temperature piping.
社団法人日本機械学会の論文
2009-03-25