Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object
The results of experimental determination of the forms of uranium and radionuclides 90Sr, 137Cs, 154Eu, 238Pu, 239+240Pu, 241Am, and 244Cm in the bottom sediments of the premises 001/3 of the "Shelter" object are presented. By the sequential extraction procedure, the following amounts are...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Institute for Nuclear Research, National Academy of Sciences of Ukraine
2021-12-01
|
| Series: | Ядерна фізика та енергетика |
| Subjects: | |
| Online Access: | http://jnpae.kinr.kiev.ua/22.4/html/22.4.0365.html |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850256079982690304 |
|---|---|
| author | O. O. Odintsov L. A. Palamar L. B. Chikur |
| author_facet | O. O. Odintsov L. A. Palamar L. B. Chikur |
| author_sort | O. O. Odintsov |
| collection | DOAJ |
| description | The results of experimental determination of the forms of uranium and radionuclides 90Sr, 137Cs, 154Eu, 238Pu, 239+240Pu, 241Am, and 244Cm in the bottom sediments of the premises 001/3 of the "Shelter" object are presented. By the sequential extraction procedure, the following amounts are determined: water-soluble, exchange, carbonate, and acid-soluble forms of uranium, fission products (90Sr, 137Cs, 154Eu), and transuranium elements (238Pu, 239+240Pu, 241Am, 244Cm) in the bottom sediments in the premises 001/3 on a mark of -2.60 m of auxiliary systems of the reactor compartment of the "Shelter" object. The concentration of uranium in the bottom sediments of room 001/3 is 3.1 ± 0.5 g/kg. Specific activity of 90Sr, 137Cs in the bottom sediments is within the range of 6·108 - 1·109 Bq/kg, and 239+240Pu and 241Am within the range of 6·105 - 8·106 Bq/kg. Radionuclides 90Sr, 137Cs, 154Eu, 238Pu, 239+240Pu, 241Am, 244Сm in the bottom sediments are in different chemical forms that will define their different potential mobility. Uranium and 137Cs in the bottom sediments of premises 001/3 mainly are in exchange forms. The amount of water-soluble forms of uranium and cesium is 1.5 - 3 %. The basic amount of 90Sr, more than 60 %, is carbonate soluble in a weak acid at рН 4.8. More than 65 % of 238Pu and 239+240Pu in the bottom sediments are in acid-soluble forms. The mobility of 154Eu, 241Am and 244Cm in the bottom sediments is much higher than that of plutonium; at pH 4.8 more than 40 % of 241Am go to soluble state. The ratio between the activities of 137Cs/90Sr, 90Sr/239+240Pu, 241Am/239+240Pu, and 244Cm/239+240Pu in the bottom sediments considerably differ from the analogical relations of radionuclides in a fuel containing materials of the "Shelter" object. |
| format | Article |
| id | doaj-art-466a741ba1104e5ea2c9263f5d48922c |
| institution | OA Journals |
| issn | 1818-331X 2074-0565 |
| language | English |
| publishDate | 2021-12-01 |
| publisher | Institute for Nuclear Research, National Academy of Sciences of Ukraine |
| record_format | Article |
| series | Ядерна фізика та енергетика |
| spelling | doaj-art-466a741ba1104e5ea2c9263f5d48922c2025-08-20T01:56:42ZengInstitute for Nuclear Research, National Academy of Sciences of UkraineЯдерна фізика та енергетика1818-331X2074-05652021-12-01224365374https://doi.org/10.15407/jnpae2021.04.365Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" objectO. O. Odintsov0L. A. Palamar1L. B. Chikur2Institute for Safety Problems of Nuclear Power Plants, National Academy of Sciences of Ukraine, Chornobyl, UkraineInstitute for Safety Problems of Nuclear Power Plants, National Academy of Sciences of Ukraine, Chornobyl, UkraineInstitute for Safety Problems of Nuclear Power Plants, National Academy of Sciences of Ukraine, Chornobyl, UkraineThe results of experimental determination of the forms of uranium and radionuclides 90Sr, 137Cs, 154Eu, 238Pu, 239+240Pu, 241Am, and 244Cm in the bottom sediments of the premises 001/3 of the "Shelter" object are presented. By the sequential extraction procedure, the following amounts are determined: water-soluble, exchange, carbonate, and acid-soluble forms of uranium, fission products (90Sr, 137Cs, 154Eu), and transuranium elements (238Pu, 239+240Pu, 241Am, 244Cm) in the bottom sediments in the premises 001/3 on a mark of -2.60 m of auxiliary systems of the reactor compartment of the "Shelter" object. The concentration of uranium in the bottom sediments of room 001/3 is 3.1 ± 0.5 g/kg. Specific activity of 90Sr, 137Cs in the bottom sediments is within the range of 6·108 - 1·109 Bq/kg, and 239+240Pu and 241Am within the range of 6·105 - 8·106 Bq/kg. Radionuclides 90Sr, 137Cs, 154Eu, 238Pu, 239+240Pu, 241Am, 244Сm in the bottom sediments are in different chemical forms that will define their different potential mobility. Uranium and 137Cs in the bottom sediments of premises 001/3 mainly are in exchange forms. The amount of water-soluble forms of uranium and cesium is 1.5 - 3 %. The basic amount of 90Sr, more than 60 %, is carbonate soluble in a weak acid at рН 4.8. More than 65 % of 238Pu and 239+240Pu in the bottom sediments are in acid-soluble forms. The mobility of 154Eu, 241Am and 244Cm in the bottom sediments is much higher than that of plutonium; at pH 4.8 more than 40 % of 241Am go to soluble state. The ratio between the activities of 137Cs/90Sr, 90Sr/239+240Pu, 241Am/239+240Pu, and 244Cm/239+240Pu in the bottom sediments considerably differ from the analogical relations of radionuclides in a fuel containing materials of the "Shelter" object.http://jnpae.kinr.kiev.ua/22.4/html/22.4.0365.htmluranium137cs90srplutoniumamericiumsequential extractionspeciation of radionuclidesbottom sediments"shelter" object. |
| spellingShingle | O. O. Odintsov L. A. Palamar L. B. Chikur Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object Ядерна фізика та енергетика uranium 137cs 90sr plutonium americium sequential extraction speciation of radionuclides bottom sediments "shelter" object. |
| title | Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object |
| title_full | Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object |
| title_fullStr | Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object |
| title_full_unstemmed | Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object |
| title_short | Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object |
| title_sort | speciation of uranium and radionuclides in the bottom sediments of premises 001 3 of the shelter object |
| topic | uranium 137cs 90sr plutonium americium sequential extraction speciation of radionuclides bottom sediments "shelter" object. |
| url | http://jnpae.kinr.kiev.ua/22.4/html/22.4.0365.html |
| work_keys_str_mv | AT ooodintsov speciationofuraniumandradionuclidesinthebottomsedimentsofpremises0013oftheshelterobject AT lapalamar speciationofuraniumandradionuclidesinthebottomsedimentsofpremises0013oftheshelterobject AT lbchikur speciationofuraniumandradionuclidesinthebottomsedimentsofpremises0013oftheshelterobject |