Transformation of Cs-IONSIV ® into a ceramic wasteform by hot isostatic pressing

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Transformation of Cs-IONSIV ® into a ceramic wasteform by hot isostatic pressing. / Chen, Tzu-Yu; Maddrell, Ewan R.; Hyatt, Neil C.; Gandy, Amy S.; Stennett, Martin C.; Hriljac, Joseph A.

In: Journal of Nuclear Materials, Vol. 498, 01.01.2018, p. 33-43.

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Chen, Tzu-Yu ; Maddrell, Ewan R. ; Hyatt, Neil C. ; Gandy, Amy S. ; Stennett, Martin C. ; Hriljac, Joseph A. / Transformation of Cs-IONSIV ® into a ceramic wasteform by hot isostatic pressing. In: Journal of Nuclear Materials. 2018 ; Vol. 498. pp. 33-43.

Bibtex

@article{906dcdbfd7b644218e5ca479cefb3885,
title = "Transformation of Cs-IONSIV {\textregistered} into a ceramic wasteform by hot isostatic pressing",
abstract = "A simple method to directly convert Cs-exchanged IONSIV{\textregistered} IE-911 into a ceramic wasteform by hot isostatic pressing (1100 °C/190 MPa/2 hr) is presented. Two major Cs-containing phases, Cs2TiNb6O18 and Cs2ZrSi6O15, and a series of mixed oxides form. The microstructure and phase assemblage of the samples as a function of Cs content were examined using XRD, XRF, SEM and TEM/EDX. The chemical aqueous durability of the materials was investigated using the MCC-1 and PCT-B standard test methods. For HIPed Cs-IONSIV{\textregistered} samples, the MCC-1 normalised release rates of Cs were <1.57 × 10−1 g m−2 d−1 at 0–28 days, and <3.78 × 10−2 g m−2 d−1 for PCT-B at 7 days. The low rates are indicative of a safe long-term immobilisation matrix for Cs formed directly from spent IONSIV{\textregistered}. It was also demonstrated that the phase formation can be altered by adding Ti metal due to a controlled redox environment.",
author = "Tzu-Yu Chen and Maddrell, {Ewan R.} and Hyatt, {Neil C.} and Gandy, {Amy S.} and Stennett, {Martin C.} and Hriljac, {Joseph A.}",
year = "2018",
month = jan
day = "1",
doi = "10.1016/j.jnucmat.2017.10.011",
language = "English",
volume = "498",
pages = "33--43",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Transformation of Cs-IONSIV ® into a ceramic wasteform by hot isostatic pressing

AU - Chen, Tzu-Yu

AU - Maddrell, Ewan R.

AU - Hyatt, Neil C.

AU - Gandy, Amy S.

AU - Stennett, Martin C.

AU - Hriljac, Joseph A.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - A simple method to directly convert Cs-exchanged IONSIV® IE-911 into a ceramic wasteform by hot isostatic pressing (1100 °C/190 MPa/2 hr) is presented. Two major Cs-containing phases, Cs2TiNb6O18 and Cs2ZrSi6O15, and a series of mixed oxides form. The microstructure and phase assemblage of the samples as a function of Cs content were examined using XRD, XRF, SEM and TEM/EDX. The chemical aqueous durability of the materials was investigated using the MCC-1 and PCT-B standard test methods. For HIPed Cs-IONSIV® samples, the MCC-1 normalised release rates of Cs were <1.57 × 10−1 g m−2 d−1 at 0–28 days, and <3.78 × 10−2 g m−2 d−1 for PCT-B at 7 days. The low rates are indicative of a safe long-term immobilisation matrix for Cs formed directly from spent IONSIV®. It was also demonstrated that the phase formation can be altered by adding Ti metal due to a controlled redox environment.

AB - A simple method to directly convert Cs-exchanged IONSIV® IE-911 into a ceramic wasteform by hot isostatic pressing (1100 °C/190 MPa/2 hr) is presented. Two major Cs-containing phases, Cs2TiNb6O18 and Cs2ZrSi6O15, and a series of mixed oxides form. The microstructure and phase assemblage of the samples as a function of Cs content were examined using XRD, XRF, SEM and TEM/EDX. The chemical aqueous durability of the materials was investigated using the MCC-1 and PCT-B standard test methods. For HIPed Cs-IONSIV® samples, the MCC-1 normalised release rates of Cs were <1.57 × 10−1 g m−2 d−1 at 0–28 days, and <3.78 × 10−2 g m−2 d−1 for PCT-B at 7 days. The low rates are indicative of a safe long-term immobilisation matrix for Cs formed directly from spent IONSIV®. It was also demonstrated that the phase formation can be altered by adding Ti metal due to a controlled redox environment.

U2 - 10.1016/j.jnucmat.2017.10.011

DO - 10.1016/j.jnucmat.2017.10.011

M3 - Article

VL - 498

SP - 33

EP - 43

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -