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| 001 | 845583 | ||
| 005 | 20240712084620.0 | ||
| 024 | 7 | _ | |a 10.1016/j.jnucmat.2018.04.001 |2 doi |
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| 024 | 7 | _ | |a 1873-4820 |2 ISSN |
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| 037 | _ | _ | |a FZJ-2018-02808 |
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| 100 | 1 | _ | |a Mühr-Ebert, E. L. |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Dissolution behavior of MgO based inert matrix fuel for the transmutation of minor actinides |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2018 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a This study explores the dissolution properties of magnesia-based inert matrix nuclear fuel (IMF) containing transuranium elements (TRU). Pure MgO pellets as well as MgO pellets containing CeO2, as surrogate for TRU oxides, and are considered as model systems for genuine magnesia based inert matrix fuel were fabricated. The aim of this study is to identify conditions at which the matrix material can be selectively dissolved during the head-end reprocessing step, allowing a separation of MgO from the actinides, whereas the actinides remain undissolved. The dissolution behavior was studied in macroscopic batch experiments as a function of nitric acid concentration, dissolution medium volume, temperature, stirring velocity, and pellet density (85, 90, 96, and 99%TD). To mimic pellets with various burn-ups the density of the here fabricated pellets was varied. MgO is soluble even under mild conditions (RT, 2.5 mol/L HNO3). The dissolution rates of MgO at different acid concentrations are rather similar, whereas the dissolution rate is strongly dependent on the temperature. Via a microscopic approach, a model was developed to describe the evolution of the pellet surface area during dissolution and determine a surface normalized dissolution rate. Moreover, dissolution rates of the inert matrix fuel containing CeO2 were determined as a function of the acid concentration and temperature. During the dissolution of MgO/CeO2 pellets the MgO dissolves completely, while CeO2 (>99%) remains undissolved. This study intends to provide a profound understanding of the chemical performance of magnesia based IMF containing fissile material. The feasibility of the dissolution of magnesia based IMF with nitric acid is discussed. |
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| 536 | _ | _ | |a ASGARD - Advanced fuelS for Generation IV reActors: Reprocessing and Dissolution (295825) |0 G:(EU-Grant)295825 |c 295825 |f FP7-Fission-2011 |x 1 |
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| 773 | _ | _ | |a 10.1016/j.jnucmat.2018.04.001 |g Vol. 505, p. 94 - 104 |0 PERI:(DE-600)2001279-2 |p 94 - 104 |t Journal of nuclear materials |v 505 |y 2018 |x 0022-3115 |
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