A5039724928- Radioactivity and Radon Measurements
- Radioactive contamination and transfer
- Graphite, nuclear technology, radiation studies
- Nuclear and radioactivity studies
- Nuclear Physics and Applications
- Concrete and Cement Materials Research
- Radiation Shielding Materials Analysis
- Radiation Detection and Scintillator Technologies
- Radioactive element chemistry and processing
- Nuclear materials and radiation effects
- Recycling and utilization of industrial and municipal waste in materials production
- Geochemistry and Geologic Mapping
- Heavy metals in environment
- Coal and Its By-products
- Particle Detector Development and Performance
- Radiation Dose and Imaging
- Rock Mechanics and Modeling
- Advanced X-ray and CT Imaging
- Body Composition Measurement Techniques
- BIM and Construction Integration
- Building materials and conservation
- Bauxite Residue and Utilization
- Drilling and Well Engineering
- Radioactive Decay and Measurement Techniques
- Nuclear Materials and Properties
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2016-2025
Universidad Complutense de Madrid
2016-2025
Unidades Centrales Científico-Técnicas
2019-2020
Abstract The radiological characterization of soil contaminated with natural radionuclides enables the classification area under investigation, optimization laboratory measurements, and informed decision-making on potential site remediation. Neural networks (NN) are emerging as a new candidate for performing these tasks an alternative to conventional geostatistical tools such Co-Kriging. This study demonstrates implementation NN estimating values ambient dose equivalent (H*(10)), surface...
The radiological characterization of aggregates used in construction materials is essential to determine their suitability from a protection perspective and ensure safety for health the environment. While activity concentrations radionuclides present are typically determined using gamma spectrometry, an alternative approach involves development statistical methods predictive models derived chemical composition material. A total 39 various types (siliceous, carbonatic, volcanic, granitic)...
Abstract This study examined the performance evaluation and analysis of laboratories Spanish Nuclear Power Plants over last 9 years 34 editions organized by CIEMAT. The participating nuclear power plants were Almaraz, Ascó I, II, Cofrentes, Santa María de Garoña, Trillo, Vandellós II. radionuclides analyzed those necessary to ensure operational radiological protection control liquid effluents from a plant. are classified into beta emitters: 3 H, 14 C, 90 Sr, gamma 241 Am, 57 Co, 137 Cs, 60...
The manufacture of Portland cement entails high energy and environmental costs, various solutions have been implemented in recent years to mitigate this negative impact. These include improvements the clinker or use supplementary cementitious materials (SCMs), such as fly ash (FA) slag a replacement for portion cement. incorporation these SCMs may increase its radiological content they are naturally occurring radioactive (NORMs). Activity Concentration Index (ACI) is screening tool...
From early April 2020, wildfires raged in the highly contaminated areas around Chernobyl nuclear power plant (CNPP), Ukraine. For about 4 weeks, fires spread and into exclusion zone (CEZ) came within a few kilometers of both CNPP radioactive waste storage facilities. Wildfires occurred on several occasions throughout month April. They were extinguished, but weather conditions by airborne embers smoldering led to new starting at different locations CEZ. The forest only completely under...
The use of more eco-efficient cements in concretes is one the keys to ensuring construction industry sustainability. Such binders often contain large but variable proportions industrial waste or by-products their composition, many which may be naturally occurring radioactive materials (NORMs). This study explored application a new gamma spectrometric method for measuring radionuclide activity hybrid alkali-activated from solid 5 cm cubic specimens rather than powder samples. research...
Although primarily deemed to be an ornamental stone, granite may also ground into fines for use in cement mortars, where it exhibits high strength and durability. Both the 40K present stone natural decay series of its uranium, thorium actinium components exhibit activity concentrations. An understanding is therefore needed correlation among different particle sizes aggregate assess their contribution a mortar's concentration index (ACI). This study analyses variation ACI with size three...
Abandoned Cu mine tailings may be associated high concentrations of U. However, the presence stable cations such as Cu, Fe, Al, Ca, or Mg, etc. in can reduce chemical efficiency liquid-liquid extraction method with tri-n-butyl phosphate (TBP); it also inhibit electrodeposition U on stainless steel planchet where sample is measured. In this work we studied an initial stage complexation ethylenediaminetetraacetic acid (EDTA) and a back different solutions: H2O, Na2CO3, (NH4)2CO3 at room...
Determining 226Ra activity concentration directly from the 186 keV photopeak using gamma spectrometry avoids 21-day waiting time required for indirect calculation 214Pb or 214Bi. Calculation methods photopeak, suppressing 235U interference, are satisfactory but do not allow analyst to correct possible biases due calculation. This paper therefore examines use of an alternative method based on a neural network that allows enrichment and monitoring solution problem, taking into account...
Cement based materials may contain varying levels of radionuclides, mainly 226Ra (from the 238U series), 232Th and 40K, which are used to determine Activity Concentration Index ("ACI"). According European directive Euratom 2013/59 in these materials, "ACI" must be < 1 suitable for their use construction. In this paper, data on activity concentration natural radionuclides cement-based (i.e. cements, additions, pigments aggregates) as well chemical composition presented. Radioactivity...
To determine their transfer factors, activity concentrations of natural radionuclides were measured in the leaves and acorns holm oak (Quercus ilex L.) trees collected from seven locations with different soil properties radionuclide concentrations. The chemical mineralogical compositions soils also analysed to investigate effect these had on absorption by trees. Soil chemistry showed significant effects incorporation into Quercus L. tissues. A relationship was established between content Ca...
The measurement of gamma emitters natural radionuclides is a very relevant subject in environmental radioactivity many fields. For this, valid calibration based on the full-energy peak efficiency (FEPE) essential, which can be carried out for gamma-ray spectrometry using Monte Carlo codes (Geant4, LabSOCS, MNCP, etc.) without needing source preparation and with much less time consuming compared to experimental methodologies. Therefore, this work aims develop methodology FEPE determination...
Abstract Spergularia rubra (L.) J. Presl & C. has a mycorrhizal resistance that leads to increased uranium uptake. The results show 35% of the 238 U is retained in carbonate fraction and 59% residual or non-reactive fraction. 226 Ra shows different pattern with an average association 19% organic matter fraction, 10% compounds remaining 71% relationships between activity concentrations soil fractions were found be statistically representative fractions, respectively.