Crevice corrosion {ampersand} pitting of high-level waste containers: the integration of deterministic {ampersand} probabilistic models (II)
An integrated predictive model is being developed to account for the effects of localized environmental conditions in crevices on the initiation and propagation of pits. A deterministic calculation is used to estimate the accumulation of hydrogen ions (pH suppression) in the crevice solution due to the hydrolysis of dissolved metals. Pit initiation and growth within the crevice is then dealt with by either a probabilistic model, or an equivalent deterministic model. Ultimately, the role of intergranular corrosion will have to be considered. While the strategy presented here is very promising, the integrated model is not yet ready for precise quantitative predictions. Empirical expressions for the rate of penetration based upon experimental crevice corrosion data can be used in the interim period, until the integrated model can be refined. Bounding calculations based upon such empirical expressions can provide important insight into worst-case scenarios.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 645392
- Report Number(s):
- UCRL-JC-127980-Pt.2; CONF-9711108-; ON: DE98051065; TRN: 98:008867
- Resource Relation:
- Conference: Total System Performance Analysis (TSPA) workshop, Las Vegas, NV (United States), 5-6 Nov 1997; Other Information: PBD: 1 Oct 1997
- Country of Publication:
- United States
- Language:
- English
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