| Инд. авторы: | Bolsunovsky A., Melgunov M.S., Chuguevskii A.V, Lind O.C., Salbu B. |
| Заглавие: | Unique diversity of radioactive particles found in the Yenisei River floodplain |
| Библ. ссылка: | Bolsunovsky A., Melgunov M.S., Chuguevskii A.V, Lind O.C., Salbu B. Unique diversity of radioactive particles found in the Yenisei River floodplain // Scientific Reports. - 2017. - Vol.7. - Iss. 1. - Art.11132. - ISSN 2045-2322. |
| Внешние системы: | DOI: 10.1038/s41598-017-11557-7; РИНЦ: 31039587; PubMed: 28894261; SCOPUS: 2-s2.0-85029297086; WoS: 000410063400061; |
| Реферат: | eng: The long-term operation of three reactors and the radiochemical plant of the Mining-and-Chemical Combine (MCC), Russia's largest producer of weapons-grade plutonium, has resulted in radioactive contamination of the Yenisei River floodplain. From 1995 to 2016, we found more than 200 radioactive particles (RP) in the Yenisei floodplain, downstream of the MCC. Analytical characterization showed that most of the RP were fuel particles, which were carried into the river after incidents at the MCC reactors. Having compared the 137Cs/134Cs ratios in the particles, we determined three time intervals when the RP were formed. The plutonium isotope ratios (238Pu/239,240Pu) vary substantially between the particles and indicate several different source terms. In addition to fuel RP, we found particles that only contained activation products (60Co or europium isotopes). SEM and γ-spectrometry showed that the cobalt particles could have originated from the corrosion of the reactor coolant system and the europium particles - from the damaged compensating rods. No europium particles have been found anywhere else in the world. The presence of RP from different sources (fuel, cobalt, and europium particles) in the Yenisei River floodplain makes this region a unique site for studying environmental effects of the particles. These RP represent point sources of radioecological significance. © 2017 The Author(s).
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| Ключевые слова: | BOTTOM SEDIMENTS; RADIONUCLIDES; CONTAINING CONTROL RODS; TRANSURANIC ELEMENTS; HOT PARTICLES; |
| Издано: | 2017 |
| Физ. характеристика: | 11132 |