ふげん配管減肉の調査

Evaluation of wall thinning of the steel piping after long term operation at "Fugen" Power Station

安藤 亮介; 阿部 輝宜; 中村 孝久

Ando, Ryosuke; Abe, Teruyoshi; Nakamura, Takahisa

「ふげん」実機材を対象とした各経年劣化事象への研究適用性、有用性の検討の一環として、二次冷却系の鋼管の減肉の調査を行った。廃止措置により解体作業が進められている「ふげん」実機配管の肉厚の詳細測定を行い、検査結果と補充することで減肉率データの信頼性について検討を行った。さらに、「ふげん」実機データに基づき、配管減肉予測式精度の向上、配管減肉管理の合理化、配管減肉対策の妥当性検証について検討を行った。

Wall thinning of the steel piping of secondary cooling system after long term operation using the served materials of "Fugen" Power Station has been investigated as a series of the evaluation of the validity and availability of the utilization of serviced materials on the research projects focused on the aging. Reliability of the wall thinning rate of the steel piping has been examined referring the previous inspection data. Besides, prediction of the wall thinning rate, rationalization of the management of pipe wall thinning and verification of the countermeasures against wall thinning, have been also examined.