radioactive contaminant Articles
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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 A2 is the radioactivity due to the natural radioisotope 40K, both expressed either as Bq/l in seawater or Bq/g in sea salt. At a second step, the same volumes of marine sediments were detected, but in this case ...
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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 ...
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Social amplification of risk and environmental collective activism: a case study of Cobalt-60 contamination incident in Taiwan
This paper employs an integrated framework – social amplification of risk – to study the incident of Cobalt-60 radioactive contamination in residences in Taiwan. Here, local collective actions were briefly resident-driven and the broader movement was subsequently dominated by activists who had never been directly impacted. The author utilises a qualitative case study that draws upon in-depth ...
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Hydrogen production coupled to nuclear waste treatment: the safe treatment of alkali metals through a well-demonstrated process
In 1992, the United Nations emphasised the urgent need to act against the perpetuation of disparities between and within nations, the worsening of poverty, hunger, ill health and illiteracy and the continuing deterioration of ecosystems on which we depend for our well-being. In this framework, taking into account the preservation of both worldwide energy resources and ecosystems, the use of ...
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Ludlum Simulator Order Fulfilled
STS has delivered a new batch of Ludlum 14C simulators to its US Distributor Radiation Safety & Control Services based in Stratham New Hampshire. The meters were supplied with STS's simulated HP260 pancake probes for the simulation of radioactive contamination in a Nuclear Plant. STS's unique gas detection system allows trainers to demonstrate contamination and decontamination but perhaps ...
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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 ...
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Food contamination after the Chernobyl accident: dose assessments and health effects
After the Chernobyl accident, a tendency to overestimate its medical consequences was noticed in many scientific publications, a recent example being the volume 1181 of the Annals of the New York Academy of Sciences, entirely dedicated to Chernobyl. In the present paper, several statements from the chapter 'Radioactive Contamination of Food and People' are discussed and their reliability ...
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STS supply Swiss specialist hospital with training simulators
STS are supplying the CHUV (Centre Hospitalier Universitaire Vaudois) with their simulated versions of the Thermo Mini 900 contamination monitor. The monitors paired with STS simulated 44A probes will allow the Institute of Radiophysics to train staff on radioactive contamination monitoring, decontamination and the hazards or cross contamination. The monitors are due for delivery later this ...
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STS delivers first simulators to China
STS has delivered its first batch of Radiation training simulators to our distributors Onbound Safetech Co in China. The order is to supply one of the Nuclear Power plants with some of STS's Safe-Series radiation field simulation equipment. The Safe-FH40G based on the Thermo FH40 and the STS Safe-Minisource have been supplied to help train technicians working in the Nuclear Plant where they are ...
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Investigation of contaminant transport in groundwater from the tailings pond of uranium mine: a case study
The present study investigates the spreading of radioactive materials through groundwater by developing a groundwater contaminant transport model. The model was analysed in the steady state, and was then applied in the transient state to predict the spreading of uranium and its daughter product in the region. The model was verified using the simulated and measured velocity of groundwater. It was ...
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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 ...
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The use of aquatic plant Elodea canadensis to assess toxicity and genotoxicity of sediments of the Yenisei River
We estimated toxicity, cyto‐ and genotoxicity of bulk sediments from the Yenisei River in laboratory bioassay based on using several endpoints of aquatic plant Elodea canadensis (Elodea). The samples of bottom sediments (BS) were collected in the Yenisei River upstream and downstream of the sources of chemical and radioactive contamination. The testing revealed different sensitivities of ...
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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 ...
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An overview of nuclear desalination: history and challenges
Both nuclear and desalination technologies are mature and proven by experience, and are commercially available from a variety of suppliers. From the early days of the two technologies, it was realised that nuclear energy could be utilised to overcome two of the challenges to the development of humankind, namely the sustainable supply of electricity and water. As early as the 1960s, the ...
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Molybdenum-rare earth oxide alloy
Molybdenum-rare earth oxide alloy (Mo-REO), also called rare earth molybdenum, is an alloy of molybdenum and rare earth element oxides, which is an oxide dispersion-strengthened alloy, similar to rare earth tungsten. Commonly used rare earth element oxides are Y2O3, La2O3, CeO2, and Nd2O3, Sm2O3, Gd2O3, and Sc2O3. They are usually added in the alloy in an amount of 0.5% -3.0% (mass fraction). The ...
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STS new products featured in Knowledge Transfer Partnership
Safe Training Systems Ltd (STS) have for the last 20 years been developing and manufacturing simulated instruments for training personnel who may encounter ionising radiation either in the workplace or when attending an incident. Whilst STS have a well established and proven capability in the simulation of radioactive contamination instrumentation they have faced greater difficulties with the ...
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210 Pb in marine salt consumed by the inhabitants of Recife, Brazil
210 Pb is widely distributed in the marine environment. The aim of this research, therefore, was to determine 210 Pb concentrations in marine salt consumed by the population of Recife and calculate the ingestion dose of 210 Pb due to marine salt consumption. The ion exchange resin method was used. The concentration of 210 Pb varied from 4 to 365 Bq kg –1 in fresh weight. The ...
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Recycling process water containing Radioactive Contamination (NORMs) - Case Study
The recycling of process water containing radioactive contamination within a Refurbishment Facility using Star-Sep™ Ceramic Crossflow Filtration This crossflow microfiltration process, using Mantec’s patented star channel Star-Sep™ Ceramic Membranes, renders the filtered water bacterially inactive and free of NORMs, which means that it can be re-used within the process. Mantec ...
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Case study - Department of energy and decommissioning and decontamination (D&D) sites
Customers Include: Department of Energy National Labs: Lawrence Livermore, Los Alamos, National Energy Technology Laboratory, National Security Technologies, Oakridge, Sandia, Savannah River Service/Product Companies: Energy Solutions, Safety & Ecology Corp. (SEC), Environmental Dimensions Inc., RADeco Applications Include: Hot cells, glove boxes, radioactive spills, D&D of ...
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NORMs contamination treatment using Ivey-sol technology
NORMs (naturally occurring radioactive materials) are found almost everywhere, and many natural materials, such as the earth’s crust, contain such radioactive materials. So what happens when oil and gas activities such as petroleum refining and natural gas extraction, disturb such radioactive material? They can alter the natural background radiation — the radiation that we are ...
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