First study of highly radioactive lava-like sample from sub-reactor premise #305/2 inside Chernobyl "Shelter".
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| Title: | First study of highly radioactive lava-like sample from sub-reactor premise #305/2 inside Chernobyl "Shelter". |
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| Authors: | Gurzhiy, Vladislav V.1 (AUTHOR) vladislav.gurzhiy@spbu.ru, Burakov, Boris E.1,2 (AUTHOR), Kasatkin, Anatoly V.3 (AUTHOR), Petrov, Yuri Yu.4 (AUTHOR), Orlova, Vera A.4 (AUTHOR), Agakhanov, Atali A.3 (AUTHOR) |
| Source: | Journal of Nuclear Materials. Jan2026, Vol. 618, pN.PAG-N.PAG. 1p. |
| Subjects: | Chernobyl Nuclear Accident, Chornobyl, Ukraine, 1986, Fukushima Nuclear Accident, Fukushima, Japan, 2011, Uranium compounds, Analytical chemistry, Lava |
| Geographic Terms: | Chornobyl (Ukraine) |
| Abstract: | • Phase and chemical composition of Chernobyl "lava" from premise #305/2 was analyzed for the first time. • Formation of secondary U-bearing phase on the "lava" surface was detected. • Low chemical resistance of Chernobyl "lava" to environmental impact was shown. The basic phase and chemical composition of Chernobyl "lava" sample from the sub-reactor premise #305/2 that is located right below reactor base plate, and which is regarded as the primary melt source, are reported for the first time. The main substance of the "lava" is the X-ray amorphous glass-like material (in wt.%): Na 2 O 1.99, K 2 O 3.81, MgO 2.97, CaO 7.51, MnO 0.29, FeO 0.14, Al 2 O 3 8.96, SiO 2 64.15, TiO 2 0.29, ZrO 2 5.13, UO 2 4.57, total 99.81). It contains small (5 to 30 μm) inclusions of technogenic analogues of natural minerals: high-uranium zircon, (Zr 0.90 U 0.09 Si 1.01 O 4), U-bearing baddeleyite (Zr 0.90 U 0.10 O 2) and Zr-bearing uraninite (U 0.83 Zr 0.17 O 2). A technogenic analogue of vorlanite, (CaU6+O 4), was found to be formed on the "lava" surface during storage at Khlopin Radium Institute under laboratory conditions, which shows the low chemical resistance of "lava" to environmental impact. The obtained results are highly important for assessing the consequences of the accident at the Fukushima Daiichi Nuclear Power Plant and modeling of the long-term environmental impact to the highly radioactive materials. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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