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Journal Articles

Chemical composition of aerosols generated by heating prototypic fuel debris samples

Journeau, C.*; Delacroix, J.*; Gu$'e$var, C.*; Testud, V.*; Brackx, E.*; Porcheron, E.*; Bouland, A.*; Berlemont, R.*; Ikeda, Atsushi

Science Talks (Internet), 6, p.100215_1 - 100215_9, 2023/05

Journal Articles

Experiences from the cutting of metallic blocks from simulant Fukushima Daiichi fuel debris

Journeau, C.*; Molina, D.*; Brackx, E.*; Berlemont, R.*; Tsubota, Yoichi

Proceedings of International Topical Workshop on Fukushima Decommissioning Research (FDR2022) (Internet), 5 Pages, 2022/10

CEA has manufactured a series of Fukushima Daiichi fuel debris simulants, either with depleted uranium oxide or with hafnium oxide as a surrogate of UO$$_{2}$$. In ex-vessel compositions resulting from an interaction between corium and concrete, the oxidic phase density becomes lighter than that of the metallic phase, which segregates at the bottom. Three of these metallic phases have been mechanically cut at CEA Cadarache with handsaw and with core boring tool in FUJISAN facility. It appeared that two of these metallic blocks were extremely hard to cut (one from a fabrication with uranium oxide, the other from a simulant block) while the last one was more easily cut. The similarities and differences in metallographic analyses (SEM-EDS and XRD) of these three metal blocks will be presented and discussed. This experience provides useful learnings in view of the cutting and retrieval of fuel debris from Fukushima Daiichi.

Journal Articles

Study on the distribution of boron in the in-vessel fuel debris in conditions close to Fukushima Daiichi Nuclear Power Station Unit 2

Ikeuchi, Hirotomo; Piluso, P.*; Fouquart, P.*; Excoffier, E.*; David, C.*; Brackx, E.*

Proceedings of 8th European Review Meeting on Severe Accident Research (ERMSAR 2017) (Internet), 12 Pages, 2017/05

no abstracts in English

Oral presentation

Solidification test of B-C-Fe-O melt in the PLINIUS/VITI facility

Ikeuchi, Hirotomo; Piluso, P.*; Fouquart, P.*; Bailly, J. S.*; Brackx, E.*; David, C.*; Domenger, R.*; Excoffier, E.*

no journal, , 

In order to clarify chemical forms of boron after the solidification of the B-C-Fe-O melt with low oxygen concentration, small-scale experiments were performed at the PLINIUS/VITI facility in CEA-Cadarache under the framework of JAEA-CEA collaboration in 2015FY. The overview of the experiment will be presented briefly during the SARNET annual meeting.

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