耐熱FBG を用いた高速炉プラント健全性監視システムの開発：耐熱FBG のひずみ計測性能評価
英字タイトル:
Development of a health monitoring system using a thermal-resistant fiber Bragg grating for fast reactor power plants: performance evaluation of a thermal-resistant FBG for strain measurement
著者:
猿田 晃一 Koichi SARUTA 月森 和之 Kazuyuki TSUKIMORI 島田 幸洋 Yukihiro SHIMADA 西村 昭彦 Akihiko NISHIMURA 小林 喬郎 Takao KOBAYASHI
発刊日:
公開日:
fast reactorfiber Bragg gratinghealth monitoringhigh temperaturenuclear power plantstrainstructural integrity
Development of a health monitoring system using a thermal-resistant fiber Bragg grating for fast reactor power plants: performance evaluation of a thermal-resistant FBG for strain measurement
著者:
猿田 晃一 Koichi SARUTA 月森 和之 Kazuyuki TSUKIMORI 島田 幸洋 Yukihiro SHIMADA 西村 昭彦 Akihiko NISHIMURA 小林 喬郎 Takao KOBAYASHI
発刊日:
公開日:
カテゴリ: 第6回
キーワードタグ:fast reactorfiber Bragg gratinghealth monitoringhigh temperaturenuclear power plantstrainstructural integrity
概要
A thermal-resistant fiber Bragg grating (FBG) fabricated by femtosecond laser processing was examined to evaluate the performance as a strain sensor, compared with a conventional FBG se nsor. Each FBG was affixed on a stainless-steel beam along with a strain gauge to measure the Bragg wavelength shift as a function of strain. We used the intensity of the reflection spe ctra from the FBGs as a weighting factor to determine the Bragg wavelengths. Although the strain sensitivity for the thermal-resistant FBG was found to be 0.34 pm/u?, a measurement accu racy of 13 u? was able to be achieved by employing the Bragg wavelength determination algorithm, which was comparable to a measurement accuracy of +2 u? for the conventional FBG sensor.
