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

ふげん配管減肉の調査

安藤 亮介; 阿部 輝宜; 中村 孝久

Ando, Ryosuke; Abe, Teruyoshi; Nakamura, Takahisa

「ふげん」実機材を対象として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結果等を行い、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。更に、「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 serviced carbon steel piping of the secondary cooling system after long term operation of Advanced Thermal prototype Reactor (ATR) Fugen power station has been investigated as a series of evaluation of validity and availability of utilization of serviced materials on research projects focused on aging management. Reliability of wall thinning rates of the steel piping has been examined referring the previous inspection data. Examinations also have been made on prediction of wall thinning rates, rationalization of management of pipe wall thinning and verification of countermeasures against wall thinning.