Evaluation of SrMoO4 in repository simulating tests

Sridhar Komarneni, R. Roy, D. M. Roy

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The SrMoO4 compound, a host for strontium in tailored nuclear waste ceramics, is highly stable in deionized water, NaCl, KCl, and the acidic MgCl2 under hydrothermal conditions of 100, 200 and 300°C as indicated by the fact that <0.5% strontium was released under these conditions. In Na2SO4 solution, SrMoO4 is somewhat reactive, as indicated by the release of ~2 and 6% of the original strontium and molybdenum inventories, respectively, into solution at 200 and 300°C. More molybdenum than strontium was detected in solution because of the crystallization of celestite, SrSO4. Thus, anions such as SO2- 4 influence the reactivity of SrMoO4. The SrMoO4 phase was found to be least stable in CaCl2 solution as indicated by the release of 93.5, 96.1, and 100% of the strontium from the initial SrMoO4 at 100, 200, and 300°C, respectively. However, only 0.02% of the original inventory of molybdenum in SrMoO4 was detected in solution. The removal of molybdenum from solutions was due to the formation of CaMoO4 powellite as revealed by x-ray diffraction. Thus, CaMoO4 is more stable than SrMoO4 under these hydrothermal conditions. These results show that SrMoO4 is stable in Na+, K+, and Mg2+ solutions but not in Ca2+-containing solutions.

Original languageEnglish (US)
Pages (from-to)71-80
Number of pages10
JournalNuclear Technology
Volume62
Issue number1
StatePublished - Jan 1 1983

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Strontium
strontium
evaluation
Molybdenum
molybdenum
Deionized water
radioactive wastes
Radioactive wastes
x ray diffraction
Negative ions
reactivity
Diffraction
Crystallization
ceramics
crystallization
anions
X rays
water

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Komarneni, Sridhar ; Roy, R. ; Roy, D. M. / Evaluation of SrMoO4 in repository simulating tests. In: Nuclear Technology. 1983 ; Vol. 62, No. 1. pp. 71-80.
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abstract = "The SrMoO4 compound, a host for strontium in tailored nuclear waste ceramics, is highly stable in deionized water, NaCl, KCl, and the acidic MgCl2 under hydrothermal conditions of 100, 200 and 300°C as indicated by the fact that <0.5{\%} strontium was released under these conditions. In Na2SO4 solution, SrMoO4 is somewhat reactive, as indicated by the release of ~2 and 6{\%} of the original strontium and molybdenum inventories, respectively, into solution at 200 and 300°C. More molybdenum than strontium was detected in solution because of the crystallization of celestite, SrSO4. Thus, anions such as SO2- 4 influence the reactivity of SrMoO4. The SrMoO4 phase was found to be least stable in CaCl2 solution as indicated by the release of 93.5, 96.1, and 100{\%} of the strontium from the initial SrMoO4 at 100, 200, and 300°C, respectively. However, only 0.02{\%} of the original inventory of molybdenum in SrMoO4 was detected in solution. The removal of molybdenum from solutions was due to the formation of CaMoO4 powellite as revealed by x-ray diffraction. Thus, CaMoO4 is more stable than SrMoO4 under these hydrothermal conditions. These results show that SrMoO4 is stable in Na+, K+, and Mg2+ solutions but not in Ca2+-containing solutions.",
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Komarneni, S, Roy, R & Roy, DM 1983, 'Evaluation of SrMoO4 in repository simulating tests', Nuclear Technology, vol. 62, no. 1, pp. 71-80.

Evaluation of SrMoO4 in repository simulating tests. / Komarneni, Sridhar; Roy, R.; Roy, D. M.

In: Nuclear Technology, Vol. 62, No. 1, 01.01.1983, p. 71-80.

Research output: Contribution to journalArticle

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N2 - The SrMoO4 compound, a host for strontium in tailored nuclear waste ceramics, is highly stable in deionized water, NaCl, KCl, and the acidic MgCl2 under hydrothermal conditions of 100, 200 and 300°C as indicated by the fact that <0.5% strontium was released under these conditions. In Na2SO4 solution, SrMoO4 is somewhat reactive, as indicated by the release of ~2 and 6% of the original strontium and molybdenum inventories, respectively, into solution at 200 and 300°C. More molybdenum than strontium was detected in solution because of the crystallization of celestite, SrSO4. Thus, anions such as SO2- 4 influence the reactivity of SrMoO4. The SrMoO4 phase was found to be least stable in CaCl2 solution as indicated by the release of 93.5, 96.1, and 100% of the strontium from the initial SrMoO4 at 100, 200, and 300°C, respectively. However, only 0.02% of the original inventory of molybdenum in SrMoO4 was detected in solution. The removal of molybdenum from solutions was due to the formation of CaMoO4 powellite as revealed by x-ray diffraction. Thus, CaMoO4 is more stable than SrMoO4 under these hydrothermal conditions. These results show that SrMoO4 is stable in Na+, K+, and Mg2+ solutions but not in Ca2+-containing solutions.

AB - The SrMoO4 compound, a host for strontium in tailored nuclear waste ceramics, is highly stable in deionized water, NaCl, KCl, and the acidic MgCl2 under hydrothermal conditions of 100, 200 and 300°C as indicated by the fact that <0.5% strontium was released under these conditions. In Na2SO4 solution, SrMoO4 is somewhat reactive, as indicated by the release of ~2 and 6% of the original strontium and molybdenum inventories, respectively, into solution at 200 and 300°C. More molybdenum than strontium was detected in solution because of the crystallization of celestite, SrSO4. Thus, anions such as SO2- 4 influence the reactivity of SrMoO4. The SrMoO4 phase was found to be least stable in CaCl2 solution as indicated by the release of 93.5, 96.1, and 100% of the strontium from the initial SrMoO4 at 100, 200, and 300°C, respectively. However, only 0.02% of the original inventory of molybdenum in SrMoO4 was detected in solution. The removal of molybdenum from solutions was due to the formation of CaMoO4 powellite as revealed by x-ray diffraction. Thus, CaMoO4 is more stable than SrMoO4 under these hydrothermal conditions. These results show that SrMoO4 is stable in Na+, K+, and Mg2+ solutions but not in Ca2+-containing solutions.

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