B112 高速炉蒸気発生器伝熱管周囲に形成されるナトリウム-水反応環境を考慮したターゲットウェステージ評価(OS3 軽水炉・新型炉・原子力安全(1))

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  • B112 Evaluation of Target-wastage in Consideration of Sodium-water Reaction Environment Formed on the Periphery of an Adjacent Tube in Steam Generator of Sodium-cooled Fast Reactor

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Wastage phenomena on adjacent tubes (target-wastage) arise from water/steam leak in steam generators of sodium-cooled fast reactors. Target-wastage is likely to be caused by liquid droplet impingement erosion (LDI) and flow-accelerated corrosion (FAC) in an environment marked by high-temperature and high-alkali (reaction jet) due to sodium-water reaction. The author carried out flow-accelerated corrosion experiments as a part of phenomena clarification experiments for target-wastage by using tube material under high-temperature sodium-hydroxide and sodium monoxide conditions which are mainly generated by sodium-water reaction. New wastage correlations were derived from LDI and FAC data based on influencing factors which were formed on the periphery of an adjacent tube, and were confirmed those applicability to water leak event in this report.

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