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圧力容器鋼監視試験片データから見た溶接熱影響部ラボデータの統計的性質

Statistical aspect of HAZ DBTT shift data compared with base metal and weld metal database

渡士 克己

Watashi, Katsumi

日本原子力研究開発機構は原子力安全・保安院の公募事業として「高経年化対策強化基盤整備事業(健全性評価の妥当性確認手法の確立等)」を受託し、原子炉圧力容器鋼溶接継手熱影響部の中性子照射脆化に関する基盤研究を実施した。本報では、母材・溶接金属の実機監視試験片試験結果を母集団として、溶接継手熱影響部模擬材試験結果の統計的な検定を行った結果を報告する。

Research on irradiation embrittlement of heat affected zone, HAZ, in weldment of RPV was experimentally studied in JAEA. Test pieces simulated HAZ was used in the study, and the result showed no significant difference between the HAZ and base metal in microscopic and mechanical properties. This report shows the result of statistical analysis of HAZ ductile brittle transition temperature shift compared with that shown as an unified equation constructed from a database of surveillance test specimens.

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