PITTING CORROSION OCCURRENCE EVALUATION DEVICE, AND PITTING CORROSION OCCURRENCE EVALUATION METHOD

To provide a pitting corrosion occurrence evaluation device, etc., capable of executing the prediction of occurrence of pitting corrosion at low cost and effectively.SOLUTION: In a pitting corrosion occurrence evaluation device, based on dry/wet alternation time data, deposit impurity concentration data and pitting corrosion occurrence data relating to pitting corrosion which occurs in each of a plurality of turbine stages when a steam turbine actually performs operation, a pitting corrosion occurrence evaluation section creates and holds a pitting corrosion occurrence evaluation table indicating a relation of a dry/wet alternation time, a deposit impurity concentration and the occurrence of pitting corrosion. The pitting corrosion occurrence evaluation section uses the pitting corrosion occurrence evaluation table to evaluate the pitting corrosion which occurs in each of the plurality of turbine stages in the operation scheduled for the steam turbine.SELECTED DRAWING: Figure 4 【課題】孔食の発生の予測を低コストかつ効果的に実行可能な孔食発生評価装置等を提供する。【解決手段】実施形態の孔食発生評価装置において、孔食発生評価部は、乾湿交番時間データ、堆積物不純物濃度データ、および、蒸気タービンが運転を実際に行ったときに複数のタービン段落のそれぞれにおいて発生した孔食に関する孔食発生データに基づいて、乾湿交番時間と堆積物不純物濃度と孔食の発生との関係を示す孔食発生評価テーブルを作成して保持する。また、孔食発生評価部は、孔食発生評価テーブルを用いて、蒸気タービンについて計画する運転において、複数のタービン段落のそれぞれで発生する孔食を評価するように構成されている。【選択図】図４