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Stabilization of Cs/Re trapping filters using magnesium phosphate ceramics

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Abstract

The present study a promising method for stabilizing spent filters trapping cesium and technetium by using magnesium phosphate ceramics. Simulated spent filters were fabricated by vaporizing nonradioactive cesium and rhenium (a surrogate of Tc) through the voloxidizer. In order to reveal the characteristics of spent filters, phase structures and thermal stability were analyzed by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy, and thermogravimetric analysis techniques. Waste forms were fabricated by crushing spent filters and mixing them with magnesium oxide and potassium phosphate. Characterizations of the waste forms were performed by the analyses of compressive strength, apparent porosity, XRD, and scanning electron microscopy. The waste forms showed the excellent mechanical property compared with that of ordinary Portland cement, with the highest compressive strength of 38.1 MPa in the sample with 30 wt% of Cs-filter. Microstructural analysis suggests that waste materials are encapsulated by the binding matrix composed of magnesium potassium phosphate. The results of characterization suggest that fabricating a sound and durable waste form is possible with magnesium phosphate ceramics.

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Authors and Affiliations

  1. Recycling Process Research Division, Korea Atomic Energy Research Institute, 1045 Daeduk-daero, Yuseong-gu, Daejeon, 305-600, Republic of Korea

    Jae Hwan Yang, Jin Myeong Shin, Chang Hwa Lee, Chul Min Heo, Min Ku Jeon & Kweon Ho Kang

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  1. Jae Hwan Yang
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  2. Jin Myeong Shin
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  3. Chang Hwa Lee
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  4. Chul Min Heo
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  5. Min Ku Jeon
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  6. Kweon Ho Kang
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Correspondence to Jae Hwan Yang.

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Yang, J.H., Shin, J.M., Lee, C.H. et al. Stabilization of Cs/Re trapping filters using magnesium phosphate ceramics. J Radioanal Nucl Chem 295, 211–219 (2013). https://doi.org/10.1007/s10967-012-1774-2

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  • DOI: https://doi.org/10.1007/s10967-012-1774-2

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