Products of molten corium-metal interaction in chernobyl accident: Composition and leaching of radionuclides.
Saved in:
| Title: | Products of molten corium-metal interaction in chernobyl accident: Composition and leaching of radionuclides. |
|---|---|
| Authors: | Shiryaev, Andrei A.1 (AUTHOR) a_shiryaev@mail.ru, Burakov, Boris E.2 (AUTHOR) burakov@peterlink.ru, Yapaskurt, Vasilii O.3 (AUTHOR) yvo72@geol.msu.ru, Zubekhina, Bella Yu4 (AUTHOR) zubekhina.bella@jaea.go.jp, Averin, Alexei A.1 (AUTHOR), Petrov, Yuriy5 (AUTHOR), Orlova, Vera5 (AUTHOR), Silantyeva, Ekaterina2 (AUTHOR), Nickolsky, Maximilian S.6 (AUTHOR), Zirlin, Vladimir A.5 (AUTHOR) redvillage11@gmail.com, Nikolaeva, Larisa D.5 (AUTHOR) |
| Source: | Progress in Nuclear Energy. Oct2022, Vol. 152, pN.PAG-N.PAG. 1p. |
| Subjects: | Radioisotopes, Chernobyl Nuclear Accident, Chornobyl, Ukraine, 1986, Cesium isotopes, Leaching, Cesium, Fission products, Nuclear reactor cores, Dermis |
| Geographic Terms: | Chornobyl (Ukraine) |
| Abstract: | During initial stages of severe nuclear accident at Chernobyl NPP on 26 April 1986 interaction between U-oxide fuel and Zr-cladding has occurred and a corium melt (Zr–U–O) formed in localized part(s) of reactor core. In this paper, we describe the properties of unique set of samples formed during interaction of the corium melt with steel in the core that was expelled from the reactor shaft into reactor premises and subsequently oxidized. These samples primarily consist of Fe–Cr oxides with inclusions of U- and Zr-based oxides. Uranium is heavily oxidized, forming U 4 O 9 and U 3 O 8. Nb/Zr ratio of the inclusions and presence of substantial Ni in the oxide matrix permitted us to identify precursor materials of the studied samples. The studied material was formed in two principal stages: interaction of liquefied fuel with Zr from walls of technological channels and/or guide rod, and subsequent reaction with steel parts located in a very well-defined part of the core – the bottom part of the guide rod and/or graphite/guide rod socket on the reactor base plate. The differences in texture between the samples are ascribed to a cooling regime and substrate on which the ejected melts were cooled. Submicron particles of fission products (Pd, Ru, Tc, etc.), very rare for Chernobyl samples, are scattered within the Fe–Cr oxide matrix. Their preservation was the result of highly oxidative conditions. Leaching of 137Cs and Am in hot aqueous fresh and saline solutions was studied. High leach rates of these nuclides is ascribed to highly oxidized state of U-containing phases. Results of the current study are compared with experiments on molten corium – vessel steel interaction and provide new details on progression of the Chernobyl NPP core destruction shortly before and during the explosion. [ABSTRACT FROM AUTHOR] |
| Copyright of Progress in Nuclear Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 159169519 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Products of molten corium-metal interaction in chernobyl accident: Composition and leaching of radionuclides. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Shiryaev%2C+Andrei+A%2E%22">Shiryaev, Andrei A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> a_shiryaev@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Burakov%2C+Boris+E%2E%22">Burakov, Boris E.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> burakov@peterlink.ru</i><br /><searchLink fieldCode="AR" term="%22Yapaskurt%2C+Vasilii+O%2E%22">Yapaskurt, Vasilii O.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> yvo72@geol.msu.ru</i><br /><searchLink fieldCode="AR" term="%22Zubekhina%2C+Bella+Yu%22">Zubekhina, Bella Yu</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> zubekhina.bella@jaea.go.jp</i><br /><searchLink fieldCode="AR" term="%22Averin%2C+Alexei+A%2E%22">Averin, Alexei A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Petrov%2C+Yuriy%22">Petrov, Yuriy</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Orlova%2C+Vera%22">Orlova, Vera</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Silantyeva%2C+Ekaterina%22">Silantyeva, Ekaterina</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nickolsky%2C+Maximilian+S%2E%22">Nickolsky, Maximilian S.</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zirlin%2C+Vladimir+A%2E%22">Zirlin, Vladimir A.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> redvillage11@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Nikolaeva%2C+Larisa+D%2E%22">Nikolaeva, Larisa D.</searchLink><relatesTo>5</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Progress+in+Nuclear+Energy%22">Progress in Nuclear Energy</searchLink>. Oct2022, Vol. 152, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Radioisotopes%22">Radioisotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Chernobyl+Nuclear+Accident%2C+Chornobyl%2C+Ukraine%2C+1986%22">Chernobyl Nuclear Accident, Chornobyl, Ukraine, 1986</searchLink><br /><searchLink fieldCode="DE" term="%22Cesium+isotopes%22">Cesium isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Leaching%22">Leaching</searchLink><br /><searchLink fieldCode="DE" term="%22Cesium%22">Cesium</searchLink><br /><searchLink fieldCode="DE" term="%22Fission+products%22">Fission products</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactor+cores%22">Nuclear reactor cores</searchLink><br /><searchLink fieldCode="DE" term="%22Dermis%22">Dermis</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Chornobyl+%28Ukraine%29%22">Chornobyl (Ukraine)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: During initial stages of severe nuclear accident at Chernobyl NPP on 26 April 1986 interaction between U-oxide fuel and Zr-cladding has occurred and a corium melt (Zr–U–O) formed in localized part(s) of reactor core. In this paper, we describe the properties of unique set of samples formed during interaction of the corium melt with steel in the core that was expelled from the reactor shaft into reactor premises and subsequently oxidized. These samples primarily consist of Fe–Cr oxides with inclusions of U- and Zr-based oxides. Uranium is heavily oxidized, forming U 4 O 9 and U 3 O 8. Nb/Zr ratio of the inclusions and presence of substantial Ni in the oxide matrix permitted us to identify precursor materials of the studied samples. The studied material was formed in two principal stages: interaction of liquefied fuel with Zr from walls of technological channels and/or guide rod, and subsequent reaction with steel parts located in a very well-defined part of the core – the bottom part of the guide rod and/or graphite/guide rod socket on the reactor base plate. The differences in texture between the samples are ascribed to a cooling regime and substrate on which the ejected melts were cooled. Submicron particles of fission products (Pd, Ru, Tc, etc.), very rare for Chernobyl samples, are scattered within the Fe–Cr oxide matrix. Their preservation was the result of highly oxidative conditions. Leaching of 137Cs and Am in hot aqueous fresh and saline solutions was studied. High leach rates of these nuclides is ascribed to highly oxidized state of U-containing phases. Results of the current study are compared with experiments on molten corium – vessel steel interaction and provide new details on progression of the Chernobyl NPP core destruction shortly before and during the explosion. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Progress in Nuclear Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=159169519 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.pnucene.2022.104373 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Radioisotopes Type: general – SubjectFull: Chernobyl Nuclear Accident, Chornobyl, Ukraine, 1986 Type: general – SubjectFull: Cesium isotopes Type: general – SubjectFull: Leaching Type: general – SubjectFull: Cesium Type: general – SubjectFull: Fission products Type: general – SubjectFull: Nuclear reactor cores Type: general – SubjectFull: Dermis Type: general – SubjectFull: Chornobyl (Ukraine) Type: general Titles: – TitleFull: Products of molten corium-metal interaction in chernobyl accident: Composition and leaching of radionuclides. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Shiryaev, Andrei A. – PersonEntity: Name: NameFull: Burakov, Boris E. – PersonEntity: Name: NameFull: Yapaskurt, Vasilii O. – PersonEntity: Name: NameFull: Zubekhina, Bella Yu – PersonEntity: Name: NameFull: Averin, Alexei A. – PersonEntity: Name: NameFull: Petrov, Yuriy – PersonEntity: Name: NameFull: Orlova, Vera – PersonEntity: Name: NameFull: Silantyeva, Ekaterina – PersonEntity: Name: NameFull: Nickolsky, Maximilian S. – PersonEntity: Name: NameFull: Zirlin, Vladimir A. – PersonEntity: Name: NameFull: Nikolaeva, Larisa D. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 01491970 Numbering: – Type: volume Value: 152 Titles: – TitleFull: Progress in Nuclear Energy Type: main |
| ResultId | 1 |
