Synroc and glass composite wasteforms for simulated radioactive waste from advanced reprocessing

Hsieh, Yun‐Hao

doi:10.25560/61472

Cited by 2 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Borosilicate glasses have been among the most preferred materials worldwide for the immobilization of both HLW and ILW (Figure A) . These are an amorphous, topologically disordered, well-developed 3D network material with an interconnected microscopic structure, and the targeted radionuclides (different wastes) are supposed to be incorporated randomly in 3D borosilicate glass networks via vitrification for their immobilization.…”

Section: Types Of Waste Formsmentioning

confidence: 99%

“…(A) Proposed borosilicate glass structure containing dissolved wastes. Reproduced with permission under creative common license from ref . Copyright from the Ph.D. thesis submitted at Imperial College London, UK (SW7 2AZ) 2018.…”

Section: Types Of Waste Formsmentioning

confidence: 99%

“…Hollandite minerals have a general formula as (Ba x Cs y )(M 2 x + y 3+ Ti 8–2 x – y 4+ )O 16 . Ba and Cs cations are usually located in cage-like tunnels, especially, forming irregular 8-fold coordination to oxygen (Figure A).…”

Section: Types Of Waste Formsmentioning

confidence: 99%

“…(C(i)) Perovskite unit cell structure along the c axis and (C(ii)) TiO 6 network forming large cavities with Ca (yellow) cations locating at the central cavities. Reproduced with permission under creative common license from ref . Copyright from the Ph.D. thesis submitted at Imperial College London, UK (SW7 2AZ) 2018.…”

Section: Types Of Waste Formsmentioning

confidence: 99%

“…Studies have reported a wide range of loading capacity (4–20 wt %) of Cs in Ba 1.04 Cs 0.24 Ga 2.32 Ti 5.68 O 16 and Cs 1.33 Ga 1.33 Ti 6.67 O 16 , respectively. , The thermal stability of hollandite minerals largely depends on the quantity and arrangements of B-site and A-site cations in the crystalline lattice structure . The stability of hollandite waste forms could also be altered due to the presence of more than one type of B-site cation.…”

Section: Types Of Waste Formsmentioning

confidence: 99%

See 4 more Smart Citations

Inorganic Waste Forms for Efficient Immobilization of Radionuclides

et al. 2021

View full text Add to dashboard Cite

The immobilization of long-lived radionuclide wastes generated from nuclear power plants (NPPs) during NPP operation, fuel reprocessing, and decommissioning of nuclear reactors is of great environmental concern. Designing suitable matrices with high durability, stability, and resistivity to various physical and chemical conditions (temperature, pressure, radiation, acidity/alkalinity, etc.) are required for the safe disposal and effective immobilization of radioactive wastes. In this review, we highlight and discuss the key developments in the design and applications of major inorganic waste forms for radioactive waste immobilization. Specifically, we review (i) glasses (borosilicates, phosphates, and sintered glasses), (ii) cements (Portland cement, cast stone/saltstone, hydroceramics, and geopolymer), (iii) synrocs (hollandite, zirconolite, and perovskite), and (iv) ceramics (titanates, sodalite, apatite, monazites, and goethite/magnetite). Additionally, we present future challenges that should be addressed during the design and selection of suitable waste forms for the immobilization of radionuclides. We believe that this paper can deepen our understanding of various waste forms and their roles in radioactive waste immobilization.

show abstract

Section: Types Of Waste Formsmentioning

confidence: 99%

Section: Types Of Waste Formsmentioning

confidence: 99%

Section: Types Of Waste Formsmentioning

confidence: 99%

Section: Types Of Waste Formsmentioning

confidence: 99%

Section: Types Of Waste Formsmentioning

confidence: 99%

See 3 more Smart Citations

Inorganic Waste Forms for Efficient Immobilization of Radionuclides

et al. 2021

View full text Add to dashboard Cite

show abstract

Hybrid Sol–Gel and Spark Plasma Sintering to Produce Perovskite-like SrTiO3 Ceramics for Radioactive Waste Isolation

Belov,

Shichalin,

Papynov

et al. 2023

J. Compos. Sci.

View full text Add to dashboard Cite

The paper presents a reliable technology combining sol–gel synthesis and spark plasma sintering (SPS) to obtain SrTiO3 perovskite-type ceramics with excellent physicomechanical properties and hydrolytic stability for the long-term retention of radioactive strontium radionuclides. The Pechini sol–gel method was used to synthesize SrTiO3 powder from Sr(NO3)2 and TiCl3 (15%) precursors. Ceramic matrix samples were fabricated by SPS in the temperature range of 900–1200 °C. The perovskite structure of the synthesized initial SrTiO3 powder was confirmed by X-ray diffraction and thermal analysis results. Scanning electron microscopy revealed agglomeration of the nanoparticles and a pronounced tendency for densification in the sintered compact with increasing sintering temperature. Chemical homogeneity of ceramics was confirmed by energy dispersive X-ray analysis. Physicochemical characteristic studies included density measurement results (3.11–4.80 g·cm−3), dilatometric dependencies, Vickers microhardness (20–900 HV), and hydrolytic stability (10−6–10−7 g·cm−2·day−2), exceeding GOST R 50926-96 and ISO 6961:1982 requirements for solid-state matrices. Ceramic sintered at 1200 °C demonstrated the lowest strontium leaching rate of 10−7 g/cm2·day, optimal for radioactive waste (RAW) isolation. The proposed approach can be used to fabricate mineral-like forms suitable for RAW handling.

show abstract

Synroc and glass composite wasteforms for simulated radioactive waste from advanced reprocessing

Cited by 2 publications

References 0 publications

Inorganic Waste Forms for Efficient Immobilization of Radionuclides

Inorganic Waste Forms for Efficient Immobilization of Radionuclides

Hybrid Sol–Gel and Spark Plasma Sintering to Produce Perovskite-like SrTiO3 Ceramics for Radioactive Waste Isolation

Contact Info

Product

Resources

About