Use of triflic acid in the recycling of Thoria from Nuclear Fuel Production Scrap

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Use of triflic acid in the recycling of Thoria from Nuclear Fuel Production Scrap. / Cagno, Simone; Gijsemans, Lukas; Tyrpekl, Václav; Cardinaels, Thomas; Verwerft, Marc; Binnemans, Koen.

In: Journal of Sustainable Metallurgy, Vol. 3, 23.06.2017, p. 659-667.

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Cagno, Simone ; Gijsemans, Lukas ; Tyrpekl, Václav ; Cardinaels, Thomas ; Verwerft, Marc ; Binnemans, Koen. / Use of triflic acid in the recycling of Thoria from Nuclear Fuel Production Scrap. In: Journal of Sustainable Metallurgy. 2017 ; Vol. 3. pp. 659-667.

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@article{de2099970f6543e1b72839ebf691b999,
title = "Use of triflic acid in the recycling of Thoria from Nuclear Fuel Production Scrap",
abstract = "The complexity in the dissolution of thoria (ThO2) and thorium-based fuels at an industrial scale is one of the limiting factors for the implementation of the thorium fuel cycle. In this study, we investigated the dissolution of unirradiated thoria powder, simulating thoria from nuclear fuel production scrap, in trifluoromethanesulfonic acid (triflic acid) solutions. The dissolution method was compared with the standard thorium uranium extraction (THOREX) dissolution process. The viability of the conversion of thorium(IV) triflate into thoria via oxalic acid precipitation and calcination was demonstrated, and the obtained thorium(IV) oxalate intermediate was characterized. Spent triflic acid could be recycled and reused for dissolution of a new batch of thoria. A triflic acid-based route could hence be considered a viable alternative for the standard THOREX-reagent-based process.",
keywords = "triflic acid, thoria, scrap, dissolution, conversion, nuclear fuel fabrication",
author = "Simone Cagno and Lukas Gijsemans and V{\'a}clav Tyrpekl and Thomas Cardinaels and Marc Verwerft and Koen Binnemans",
note = "Score=10",
year = "2017",
month = jun,
day = "23",
doi = "10.1007/s40831-017-0136-2",
language = "English",
volume = "3",
pages = "659--667",
journal = "Journal of Sustainable Metallurgy",
issn = "2199-3823",
publisher = "Springer",

}

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TY - JOUR

T1 - Use of triflic acid in the recycling of Thoria from Nuclear Fuel Production Scrap

AU - Cagno, Simone

AU - Gijsemans, Lukas

AU - Tyrpekl, Václav

AU - Cardinaels, Thomas

AU - Verwerft, Marc

AU - Binnemans, Koen

N1 - Score=10

PY - 2017/6/23

Y1 - 2017/6/23

N2 - The complexity in the dissolution of thoria (ThO2) and thorium-based fuels at an industrial scale is one of the limiting factors for the implementation of the thorium fuel cycle. In this study, we investigated the dissolution of unirradiated thoria powder, simulating thoria from nuclear fuel production scrap, in trifluoromethanesulfonic acid (triflic acid) solutions. The dissolution method was compared with the standard thorium uranium extraction (THOREX) dissolution process. The viability of the conversion of thorium(IV) triflate into thoria via oxalic acid precipitation and calcination was demonstrated, and the obtained thorium(IV) oxalate intermediate was characterized. Spent triflic acid could be recycled and reused for dissolution of a new batch of thoria. A triflic acid-based route could hence be considered a viable alternative for the standard THOREX-reagent-based process.

AB - The complexity in the dissolution of thoria (ThO2) and thorium-based fuels at an industrial scale is one of the limiting factors for the implementation of the thorium fuel cycle. In this study, we investigated the dissolution of unirradiated thoria powder, simulating thoria from nuclear fuel production scrap, in trifluoromethanesulfonic acid (triflic acid) solutions. The dissolution method was compared with the standard thorium uranium extraction (THOREX) dissolution process. The viability of the conversion of thorium(IV) triflate into thoria via oxalic acid precipitation and calcination was demonstrated, and the obtained thorium(IV) oxalate intermediate was characterized. Spent triflic acid could be recycled and reused for dissolution of a new batch of thoria. A triflic acid-based route could hence be considered a viable alternative for the standard THOREX-reagent-based process.

KW - triflic acid

KW - thoria

KW - scrap

KW - dissolution

KW - conversion

KW - nuclear fuel fabrication

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/28549284

U2 - 10.1007/s40831-017-0136-2

DO - 10.1007/s40831-017-0136-2

M3 - Article

VL - 3

SP - 659

EP - 667

JO - Journal of Sustainable Metallurgy

JF - Journal of Sustainable Metallurgy

SN - 2199-3823

ER -

ID: 3913431