radioactive contaminant Articles

  • Lysimetric studies for modelling radioactive contaminant transport in soils

    To assess the movement of contaminants in the soil mass surrounded by near/subsurface waste repository, researchers have developed several mathematical and numerical modelling techniques. However, most of these techniques consider remolded state of soil mass, which fail to reproduce exact in situ conditions and also have used inactive salts as model contaminants. Hence, in order to model ...


    By Inderscience Publishers

  • Radioactive Clean-up

    Radioactive, nuclear, or radiation clean-up is considered as the most dangerous, difficult, and costly remediation activity after a nuclear disaster or accident.  The contamination may be found in the air, water, and soil, as wells as equipment and buildings (USEPA, 2010). Radioactive material is unstable, while the nuclei of radioactive atoms emit ionizing radiation (i.e., alpha ...


    By IWA Publishing

  • Processing technology for radioactive wastes

    For 20 years now, AVA has been delivering innovative mixers, dryers, and systems for environmental and processing technologies. The treatment of highly contaminated materials has always been one of our core competencies. For more than 10 years, AVA Technology has been applied for the processing of radioactive wastes. The application of AVA mixers and reactors may be divided into two main ...


    By AVA GmbH u. Co. KG

  • Radioactive Clean-up

    Radioactive, nuclear, or radiation clean-up is considered the most dangerous, difficult, and costly remediation activity after a nuclear disaster or accident.  The contamination may be found in the air, water, and soil, as wells as equipment and buildings (USEPA, 2010).Radioactive material, unlike most matter, is inherently unstable. Over time, the nuclei of radioactive atoms emit what's ...


    By IWA Publishing

  • Total and cancer mortality of the residents living in a zone of weak technogenic radioactive contamination

    Radioactive contamination of the floodplain of the Yenisei River with the wastes dumped by the Krasnoyarsk Mining and Chemical Combine (MCC) might cause external and internal irradiation of a large part of the rural population inhabiting the banks of the Yenisei. Contrary to official data, a few independent studies of the doses received by the exposed population showed that they were quite ...


    By Inderscience Publishers

  • Radioactive waste management technologies used in rehabilitation of radioactively contaminated facilities and areas at the RRC 'Kurchatov Institute' site

    Activities on rehabilitation of eleven temporary radwaste repositories are currently underway at the RRC 'Kurchatov Institute'. Technologies used for exploratory drilling of repositories, their radiation survey, cleaning fill-up soil from the repository ceilings and opening the ceilings, RW extraction, sorting and packing in containers are presented. The radiation situation at the repository site ...


    By Inderscience Publishers

  • Establishment of a radioactive contamination index in seawater from the Gulf and Pacific coasts in Mexico

    This paper intends to establish one radioactive contamination index in seawater based on the relation A1/A2, where A1 is the radioactivity due to the contaminant radioisotope 137Cs and A ...


    By Inderscience Publishers

  • Decision support system for risk-based land management and rehabilitation of radioactively contaminated territories: PRANA approach

    Description of the approaches to a decision support system on Risk Based Land Management (RBLM) and rehabilitation of radioactively contaminated territories on the basis of integrating monitoring data, Geographic Information Systems (GIS), models and decision support tools is presented in this paper. The key blocks of the PRANA DSS, developed for scientific and practical needs for model ...


    By Inderscience Publishers

  • Management of sewage sludge and ash containing radioactive materials

    Approximately 50% of the seven to eight million metric tonnes of municipal sewage sludge produced annually in the US is reused. Beneficial uses of sewage sludge include agricultural land application, land reclamation, forestry, and various commercial applications. Excessive levels of contaminants, however, can limit the potential usefulness of land-applied sewage sludge. A recently completed ...


    By Inderscience Publishers

  • Innovation in radioactive wastewater-stream management: Part one

    Treatment of radioactive wastewater streams is receiving considerable attention in most countries that have nuclear reactors. The first Egyptian research reactor ETRR-1 has been operating for 40 years, resulting in accumulation of large quantities of wastewater collected in special drainage tanks called SDTs. Previous attempts were aimed at the volumetric reduction of streams present in SDTs, by ...


    By Inderscience Publishers

  • How to treat radioactive NORM sludge with VacuDry

    NORM doesn’t sound like a big thing. But Naturally Occurring Radioactive Material might let the alarm bells ring. Everyone has heard of “radioactive material” and that sounds dangerous. However, most of this material is trapped deep in the ground beneath our feet. From there it reaches the surface, for example via the water cycle. Another possible pathway for NORM to reach the ...


    By econ industries GmbH

  • Monitoring radioactivity in nuclear and radiological emergency in a European perspective: aims and means

    After the Chernobyl nuclear power plant accident, European countries have further enhanced their capacity and infrastructure for monitoring radioactivity in their environment. This paper gives a summary of the most commonly used techniques relevant to routine and nuclear and/or radiological emergency conditions, followed by a discussion of the various network types (routine, emergency ...


    By Inderscience Publishers

  • Large eddy simulation modelling of the dispersion of radioactive particulate matter

    Field experiments with a Radioactive Dispersion Device (RDD) were performed by the National Radiation Protection Institute (NRPI) of the Czech Republic. We present the results of computer simulations of these experiments using a new microscale model, Charles University Large Eddy Microscale Model (CLMM). The model was first validated using wind tunnel data for the dispersion of continuous passive ...


    By Inderscience Publishers

  • Groundwater and contaminant transport modelling

    Client: Nuclear Industry Location: Cumbria, UK Services: Radioactive waste consultancy, hydrogeological risk assessment Issues: Potential risk to groundwater, environment and human health. System conceptualisation Summary: ESI developed a FEFLOW finite element model of the groundwater system in the ...


    By ESI Consulting

  • External exposure due to natural radioactivity in some household kits

    Specific activities (Bq/kg and ppm) of naturally occurring radionuclides were measured for about 57 samples from some household kits. The maximum specific activity values were 76.12, 118.37 and 3340.6 Bq/kg for U-238, Th-232 and K-40, respectively. The external exposure rate (μR/h) and dose rate (nG/h) were calculated. The maximum mean annual effective dose due to U-238 from Chinese ceramic ...


    By Inderscience Publishers

  • Radioactive waste buried beneath Runit Dome on Enewetak Atoll, Marshall Islands

    In the early 1970s after extensive characterisation of fallout the US Pacific Proving Grounds located at Enewetak Atoll began rehabilitation in preparation for the return of indigenous people who were relocated during the Cold War. Cleanup entailed removal and collection of ∼545 GBq of contaminated topsoil, vegetation, and debris (concrete and metal) that was subsequently entombed within an ...


    By Inderscience Publishers

  • Removal of Radioactive Effluent Waste from Uranium Enrichments Plants

    In an effort to reduce greenhouse emissions many nations and multi-national corporations are once again focusing on the development of safe radioactive sources for energy generation. After a hiatus of some 20 years commercial nuclear power plants are being developed globally to satisfy increasing global energy demands. Whether for generation of electrical power or in the production of fission ...


    By Dynamic Adsorbents, Inc.

  • Illicit trafficking of nuclear and other radioactive material: the 'net' security threat

    Illicit trafficking in nuclear and other radioactive material, which could be used for building a nuclear weapon or a radiological dispersal device, has been a subject of concern for more than a decade. A major obstacle to assessing the actual security threat due to nuclear trafficking is the inclusion in the analysis of incidents that do not represent a security threat, in the sense of being a ...


    By Inderscience Publishers

  • New LWT system improves safety for workers dredging radioactive materials

    Problem: Cleanup crews wanted to dredge radioactive sludge from hazardous waste pits without releasing contaminants to the environment. Solution: A remote-control system encloses the radioactive material during dredging and keeps workers at a safe distance. The Weldon Springs, Mo. Superfund site and remedial action project has four pits containing low-level radioactive raffinate debris and ...

  • Properties and Behavior of Inorganics in Contaminated Soil

    Often, specific technologies may be ruled out, or the list of potential technologies may be immediately narrowed, on the basis of the presence or absence of one or more of the chemical groups. The relative amounts of each may tend to favor certain technologies. Metals may be found in the elemental form, but more often they are found as salts mixed in the soil. At the present time, treatment ...

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