Hostname: page-component-76fb5796d-22dnz Total loading time: 0 Render date: 2024-04-28T18:16:12.209Z Has data issue: false hasContentIssue false
  • English
  • Français

Modeling Corrosion Processes for Alloy 22 Waste Packages

Published online by Cambridge University Press:  21 March 2011

D.S. Dunn ,
O. Pensado ,
Y.-M. Pan ,
L.T. Yang  and
X. He
D.S. Dunn
Affiliation:
ddunn@swri.orgCenter for Nuclear Waste Regulatory Analyses (CNWRA) Southwest Research Institute® 6220 Culebra Road, San Antonio, TX 78238-5166, USA
O. Pensado
Affiliation:
ddunn@swri.orgCenter for Nuclear Waste Regulatory Analyses (CNWRA) Southwest Research Institute® 6220 Culebra Road, San Antonio, TX 78238-5166, USA
Y.-M. Pan
Affiliation:
ddunn@swri.orgCenter for Nuclear Waste Regulatory Analyses (CNWRA) Southwest Research Institute® 6220 Culebra Road, San Antonio, TX 78238-5166, USA
L.T. Yang
Affiliation:
ddunn@swri.orgCenter for Nuclear Waste Regulatory Analyses (CNWRA) Southwest Research Institute® 6220 Culebra Road, San Antonio, TX 78238-5166, USA
X. He
Affiliation:
ddunn@swri.orgCenter for Nuclear Waste Regulatory Analyses (CNWRA) Southwest Research Institute® 6220 Culebra Road, San Antonio, TX 78238-5166, USA
Get access

Abstract

The proposed waste package design for the disposal of high-level radioactive waste at the potential repository at Yucca Mountain, Nevada, consists of an outer container made of Alloy 22, a corrosion resistant Ni-Cr-Mo-W alloy, surrounding an inner container made of Type 316 nuclear grade stainless steel. Models to assess the influence of waste package degradation modes on the overall system performanceconsider uniform and localized corrosion processes. Based on measurements of passive anodic current density, the uniform aqueous corrosion rate of Alloy 22 is estimated to be slow, and long waste package lifetimes are projected in the absence of conditions that promote accelerated degradation processes. The initiation of localized corrosion is possible in chloride-containing waters with low concentrations of inhibiting oxyanions such as nitrate. Although propagation rates for localized corrosion are typically orders of magnitude greater than the passive uniform corrosion rates, the maximum penetration depth of localized attack may be limited to depths significantly less than the container thickness as a result of stifling andarrest of localized corrosion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 932: Symposium – Scientific Basis for Nuclear Waste Management XXIX , 2006 , 27.1
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] DOE. DOE/RW–0539–1, Rev. 1, Las Vegas, NV: DOE, 2002.Google Scholar
[2] Mohanty, S., McCartin, T.J., and Esh, D.W. (coords.), “Total-system Performance Assessment (TPA) Version 4.0 Code: Module Descriptions and Users Guide (Revised)” San Antonio, TX: CNWRA, 2002.Google Scholar
[3] Pensado, O., Dunn, D.S., Cragnolino, G.A., Jain, V., Report No. CNWRA 2003-01, San Antonio, TX, 2003.Google Scholar
[4] Dunn, D.S., Pensado, O., Pan, Y.-M., Pabalan, R.T., Yang, L., He, X., Chaing, K.T.. Report No. CNWRA 2005-02, San Antonio, TX: CNWRA, 2005.Google Scholar
[5] Dunn, D.S., Yang, L., Wu, C., and Cragnolino, G.A., Scientific Basis for Nuclear Waste Management XXVIII, edited by Hanchar, J.M., Stroes-Gascoyne, S., and Browning, L., (Mat Res Soc Proc. 824, Warrendale, PA, 2004) pp. 33–38.Google Scholar
[6] Dunn, D.S., Pensado, O., and Cragnolino, G.A. in CORROSION 2005, (NACE International, Paper No. 588, Houston, TX, 2005).Google Scholar
[7] Dunn, D.S., Yang, L., Pan, Y.M., and G.A. Cragnolino in CORROSION 2003, (NACE International, Paper No. 697, Houston, TX, 2003).Google Scholar
[8] ASTM International “Metals Test Methods and Analytical Procedures. ASTM G61–86 (1998): Standard Test Method for Conducting Cyclic Potentiodynamic Polarization Measurements for Localized Corrosion Susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys. Volume 3.02: Wear and Erosion–Metal Corrosion. Published on CD ROM. West Conshohocken, Pennsylvania: ASTM International. 2004.Google Scholar
[9] ASTM International “Metals Test Methods and Analytical Procedures.” ASTM G46–94 (1998): Standard Guide for Examination and Evaluation of Pitting Corrosion. Volume 3.02: Wear and Erosion–Metal Corrosion. Published on CD ROM. West Conshohocken, Pennsylvania: ASTM International. 2004.Google Scholar
[10] Szklarska-Smialowska, Z., Pitting and Crevice Corrosion of Metals (NACE International, Houston, TX, 2005).Google Scholar
[11] Kehler, B.A., Ilevbare, G.O., and Scully, J.R., Corrosion 57, 1,042 (2001).Google Scholar
[12] Jallerat, F.L., , Pari, Bourelier, F., Quang, K. Vu in 9th International Congress on Metallic Corrosion (National Research Council of Canada Publishers, Ottawa, Canada, 1984) pp. 404–406.Google Scholar
[13] Cragnolino, G.A., Dunn, D.S., and Pan, Y.-M. in Scientific Basis for Nuclear Waste Management XXV, edited by McGrail, B.P. and Cragnolino, G.A., (Mat Res Soc Proc. 713, Warrendale, PA, 2002) pp. 53–60.Google Scholar
[14] Isaacs, H.S.. Advances in Localized Corrosion NACE-9, edited by Isaacs, H., Bertocci, U., Kruger, J., and Smialowski, S., (NACE International, Houston, TX, 1987)Google Scholar
[15] Lott, S.E. and Alkire, R.C., Journal of the Electrochemical Society 136, pp. 973–979. 1989.Google Scholar
[16] Sridhar, N. and Dunn, D.S., Corrosion 50, pp. 857–871. 1994.Google Scholar