Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-05T04:45:39.182Z Has data issue: false hasContentIssue false

Iodine Immobilization by Sodalite Waste Form

Published online by Cambridge University Press:  21 March 2011

T. Nakazawa
Affiliation:
Mitsubishi Materials Corporation, Energy & Ecosystem Laboratories, Ibaraki, 311-0102, JAPAN, E-mail: [email protected]
H. Kato
Affiliation:
Mitsubishi Materials Corporation, Energy & Ecosystem Laboratories, Ibaraki, 311-0102, JAPAN, E-mail: [email protected]
K. Okada
Affiliation:
Mitsubishi Materials Corporation, Energy & Ecosystem Laboratories, Ibaraki, 311-0102, JAPAN, E-mail: [email protected]
S. Ueta
Affiliation:
Japan Nuclear Cycle Development Institute, Tokai Works, Ibaraki, 319-1194, JAPAN
M. Mihara
Affiliation:
Mitsubishi Materials Corporation, Energy & Ecosystem Laboratories, Ibaraki, 311-0102, JAPAN
Get access

Abstract

Leachabilities and solubilities of the synthesized iodide sodalite and natural (chloride) sodalite were measured by leach test. The iodide sodalite was synthesized in nitrogen gas flow at 800°C for 2 hours. The crystalline structure of the product was certified by XRD analysis. The natural sodalite containing chlorine was obtained at Bancroft, Canada. The several types of solution were used to evaluate the influence of the solubility of sodalite that included the varied pH and the chemical compositions. The solubilities of chloride sodalite were calculated by the thermodynamics data. The solubility measured for the synthesized iodide sodalite was compared with that calculated. The solubility of the synthesized iodide sodalite was approximately 2 x 10-4 mol/L, which shows a good agreement with the calculated one of the natural sodalite.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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. Winters, W.I., “The Effect of Hot-Pressing Conditions on the Properties of Iodide Sodalite”, RHO-LD-153, 1980 Google Scholar
2. Vance, E.R., Agrawal, D.K. et al., “Ceramic Phase for Immobilization of I-129”, DOE/ET/41900-9, 1981 Google Scholar
3. Pereira, C., “Production of Sodalite Waste Forms by Addition of Glass”, ANL/CMT/CP-84675, 1995 Google Scholar
4. Koyama, T., Seto, C., Yoshida, T., Kawamura, F., and Tanaka, H., “Immobilization of Halide Salt Waste from Pyrochemical Reprocessing by Forming Natural Occurring Mineral; SODALITE”, International Conference on Evaluation of Emerging Nuclear Fuel Cycle Systems, Global '95, pp.17441751, 1995 Google Scholar
5. Nakazawa, T., Kato, H., Takase, T., Ueta, S., “Immobilization of Iodine by Sodalite Waste Form”, J.Nuclear Fuel Cycle and Environment, Vol.6, No.1, Dec 1999 (in Japanese)Google Scholar
6. Parkhurst, D.L., Thorstenson, D.C. and Plummer, L.N., PHREEQE. A Computer program for Geochemical Calculations., U.S.GEOLGICAL SURVEY, Water-Resource Investigations, 80-96, 1980 Google Scholar
7. Komada, N., Westrum, E.F. Jr, Hemingway, B.S., Zolotov, M.Y., Semenov, Y.V., and Anovitz, L.M., “Thermodynamic Properties of Sodalite at Temperatures from 15K to 1000K”, J.Chem.Thermodynamics, 27, pp.11191132, 1995 Google Scholar
8.Thermodynamic Table for Nuclear Waste Isolation, NUREG/CR-4865Google Scholar