Hydrogen Induced Cracking in Titanium Drip Shield of High-Level Waste Repository

Lu, S C

Lawrence Livermore National Laboratory

关键词: Corrosion;    Titanium;    08 Hydrogen;    Absorption;    36 Materials Science;   

DOI  :  10.2172/15005125
RP-ID  :  UCRL-JC-143999
RP-ID  :  W-7405-ENG-48
RP-ID  :  15005125

美国|英语

来源: UNT Digital Library

【 摘 要 】

Both qualitative and quantitative assessments have been conducted to evaluate the effects of hydrogen induced cracking on the drip shield. The basic premise of the assessments is that failure will occur once the hydrogen content exceeds a certain limit or critical value, H{sub c}. Potential mechanisms for hydrogen absorption in the drip shield have been identified to be general passive corrosion and galvanic couple with steel components. Both qualitative and quantitative evaluations indicated that hydrogen concentration in the drip shield will be below the critical value by a considerable margin. The choice of the mathematical models and associated parameters appears to be reasonable. Continued effort in data collection and development should provide validation and improved level of confidence of the proposed models.