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- Material Type
- 規格・テクニカルリポート類
- Author/Editor
- 谷口 直樹市川 史郎
- Publication Date
- 1999-09
- Publication Date (W3CDTF)
- 1999
- Alternative Title
- Measurement of hydrogen content in carbon steeI exposed to hydrogen gas environment
- Periodical title
- JNC TN8400 99-056
- Target Audience
- 一般
- Note (General)
- 出版タイプ: NA高レベル放射性廃棄物処分において、還元性環境下では炭素鋼オーバーパックに水の還元による腐食が進展し、それによって水素ガスが発生する。水溶液中や水素ガス環境中で金属中に水素が吸収された場合、水素脆化により破損する場合がある。ここでは水素ガスとの接触による脆化の可能性を評価することを目的として、処分環境で最も厳しいと想定される10MPa、100$^{\circ}C$の水素ガス環境に置かれた炭素鋼試験片中の水素吸収量を大気圧イオン化質量分析計を用いて測定した。その結果、吸収された炭素鋼中の水素濃度は0.02$\sim$0.03ppmの範囲であり、処分環境において水素ガスの接触による炭素鋼オーバーパックの水素脆化は起こらないと考えられる。Carbon steel overpacks for high level radioactive waste disposal would be attacked corrosion due to water reduction under reducing condition and the hydrogen would be generated by the corrosion reaction. When the hydrogen is absorbed into metal in the solution or in the hydrogen gas environment, the metal is sometimes damaged by the hydrogen embrittlement. In this study, hydrogen content in carbon steel specimens were measured after the exposure to hydrogen gas environment of 10MPa, 100$^{\circ}$C which is regarded as the most severe case under repository condition. As the results of measurement, the absorbed hydrogen concentration in carbon steel was 0.02$\sim$0.03 ppm and it was concluded that the hydrogen embrittlement due to the contact with hydrogen gas would not be likely to occur on carbon steel overpack under the repository condition.
- Source
- /JNC-TN8400-99-056.pdf (fulltext)