Accumulation of (152)Eu and (15)(4)Eu isotopes in bulk soil and rhizosphere soil in the near-field zone of influence of the Krasnoyarsk Mining and Chemical Combine was studied. An uneven distribution of specific activity of Eu isotopes was observed, with the gross specific activities of the isotopes in the bulk soil exceeding those of the rhizosphere. In the most contaminated locations the fine and the coarse granulometric fractions are enriched with the isotopes. A laboratory experiment indicated potential removal of soluble Eu isotopes by river flood waters may amount to 3% of the total Eu in both bulk and rhizosphere soils. The root system of plants growing in the contaminated territory accumulates (152)Eu and (154)Eu, although the isotopes were not discovered in aboveground parts of plants. Root-hairs were found to be the most contaminated.
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http://dx.doi.org/10.1016/j.jenvrad.2011.10.021 | DOI Listing |
Health Phys
January 2025
China Medical University Hospital, No. 2, Yude Road, Taichung, Taiwan.
The shielding performance and activation susceptibility of a sandwich wall in the proton therapy facility of China Medical University Hospital were investigated in an integrated manner using FLUKA Monte Carlo simulations. The 2-m-thick partition wall between two adjoining treatment rooms had a three-layered structure, which comprised a 0.2-m-thick iron layer sandwiched between two layers of 0.
View Article and Find Full Text PDFHeliyon
July 2024
Environmental Radioactivity Safety Team, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-gu, Daejeon, 34113, South Korea.
The decommissioning of nuclear power plants has led to a surge in the production of radioactive waste, necessitating the development of accurate and reliable measurement methods for safe waste disposal. This study presents the development of a new concrete reference material (RM) containing beta, and gamma nuclides for quality assurance and quality control (QA/QC) in concrete measurements. The newly developed RM manufacturing method was used to ensure sample homogeneity; rigorous processes were followed according to ISO guidelines.
View Article and Find Full Text PDFJ Environ Radioact
February 2024
Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 3 Academician Koptyug av., Novosibirsk, 630090, Russia. Electronic address:
Particulate matter trapped by tufts of water moss Fontinalis antipyretica inhabiting fast flowing waters of the Yenisei River (Siberia, Russia) contaminated with artificial radionuclides has been studied as a potential monitor of radioactive releases to the river. Particulate matter, which was removed from wet tufts of water moss of the Yenisei by rinsing them in water, constituted at least 38% of bulk dry weight of the moss biomass sample and was similar in the contents of chemical elements, minerals, organic matter, and artificial radionuclides to bottom sediments of the Yenisei. Considerable bulk percentages of artificial radionuclides in the sample of water moss, 77% of Cs, 44% of Co, 41% of Eu, 55% of Eu, 66% of Am, and 34-36% of plutonium were associated with extracellular particles.
View Article and Find Full Text PDFRadiat Prot Dosimetry
May 2023
Environmental Physics Laboratory, Centre for Energy Research, Budapest 1121, Hungary.
With the increasing number of decommissioning projects, radioactive waste estimation of biological shielding concretes is becoming more and more important. Simulation tools supporting this activity, like MCNP and Cinder are already available; however, publicly available neutron spectra in shielding concretes are limited. The aim of the study was to present and evaluate possible model arrangements for accurate neutron transport to deeper points of shielding concretes from the reactor pressure vessel.
View Article and Find Full Text PDFAppl Radiat Isot
October 2022
Health Physics Division, Bhabha Atomic Research Centre (BARC), Mumbai, India.
Sm-EDTMP is widely used as a palliative radiopharmaceutical for treatment of metastatic bone pain. It is produced by neutron activation of enriched Sm targets in a nuclear reactor. The long-lived europium radionuclides are co-produced along with production of Sm and it give rise to radioactive waste in Sm-EDTMP production.
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