Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions
U isotope data measured on real fragments of the Chernobyl nuclear fuel included in zircon crystals crystallised from the Chernobyl “lava” are presented for the first time. The U isotope data show no anomalies and lie within the expected burnup values for the Chernobyl nuclear fuel. However, the U c...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
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Elsevier BV * North-Holland
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/25374 |
| _version_ | 1848751690718642176 |
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| author | Pöml, P. Burakov, B. Geisler, T. Walker, C.T. Grange, Marion Nemchin, Alexander Berndt, J. Fonseca, R.O.C. Bottomley, P.D.W. Hasnaoui, R. |
| author_facet | Pöml, P. Burakov, B. Geisler, T. Walker, C.T. Grange, Marion Nemchin, Alexander Berndt, J. Fonseca, R.O.C. Bottomley, P.D.W. Hasnaoui, R. |
| author_sort | Pöml, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | U isotope data measured on real fragments of the Chernobyl nuclear fuel included in zircon crystals crystallised from the Chernobyl “lava” are presented for the first time. The U isotope data show no anomalies and lie within the expected burnup values for the Chernobyl nuclear fuel. However, the U concentration, the U isotopic composition, and the Ti concentration in the host zircon vary significantly within single crystals as well as between single crystals. Our results indicate that during the time of melt activity temperature and melt composition likely varied considerably. New melt was formed progressively (and solidified) during the accident that reacted and mixed with pre-existing melt that never fully equilibrated. In such an environment zircon crystals crystallised at temperatures below 1250 °C, as estimated from thermodynamic considerations along with the observation that the centre of the investigated zircon crystal contains monoclinic ZrO2 inclusions. Since the zircon crystals crystallised before the silicate melt spread out into the reactor block basement, the flow of the melt into the basement must also have occurred at temperatures below 1250 °C. |
| first_indexed | 2025-11-14T07:56:44Z |
| format | Journal Article |
| id | curtin-20.500.11937-25374 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:56:44Z |
| publishDate | 2013 |
| publisher | Elsevier BV * North-Holland |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-253742017-09-13T15:18:09Z Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions Pöml, P. Burakov, B. Geisler, T. Walker, C.T. Grange, Marion Nemchin, Alexander Berndt, J. Fonseca, R.O.C. Bottomley, P.D.W. Hasnaoui, R. U isotope data measured on real fragments of the Chernobyl nuclear fuel included in zircon crystals crystallised from the Chernobyl “lava” are presented for the first time. The U isotope data show no anomalies and lie within the expected burnup values for the Chernobyl nuclear fuel. However, the U concentration, the U isotopic composition, and the Ti concentration in the host zircon vary significantly within single crystals as well as between single crystals. Our results indicate that during the time of melt activity temperature and melt composition likely varied considerably. New melt was formed progressively (and solidified) during the accident that reacted and mixed with pre-existing melt that never fully equilibrated. In such an environment zircon crystals crystallised at temperatures below 1250 °C, as estimated from thermodynamic considerations along with the observation that the centre of the investigated zircon crystal contains monoclinic ZrO2 inclusions. Since the zircon crystals crystallised before the silicate melt spread out into the reactor block basement, the flow of the melt into the basement must also have occurred at temperatures below 1250 °C. 2013 Journal Article http://hdl.handle.net/20.500.11937/25374 10.1016/j.jnucmat.2013.03.031 Elsevier BV * North-Holland restricted |
| spellingShingle | Pöml, P. Burakov, B. Geisler, T. Walker, C.T. Grange, Marion Nemchin, Alexander Berndt, J. Fonseca, R.O.C. Bottomley, P.D.W. Hasnaoui, R. Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions |
| title | Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions |
| title_full | Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions |
| title_fullStr | Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions |
| title_full_unstemmed | Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions |
| title_short | Micro-analytical uranium isotope and chemical investigations of zircon crystals from the Chernobyl ‘‘lava’’and their nuclear fuel inclusions |
| title_sort | micro-analytical uranium isotope and chemical investigations of zircon crystals from the chernobyl ‘‘lava’’and their nuclear fuel inclusions |
| url | http://hdl.handle.net/20.500.11937/25374 |