A5102906690- Radioactivity and Radon Measurements
- Radioactive contamination and transfer
- Nuclear and radioactivity studies
- Graphite, nuclear technology, radiation studies
- Radiation Dose and Imaging
- Radiation Detection and Scintillator Technologies
- Radiation Shielding Materials Analysis
- Radioactive Decay and Measurement Techniques
- Nuclear Physics and Applications
- Geological Formations and Processes Exploration
- Atmospheric and Environmental Gas Dynamics
- Radiation Therapy and Dosimetry
- Scientific Measurement and Uncertainty Evaluation
- Infection Control and Ventilation
- Geochemistry and Geologic Mapping
- Integrated Water Resources Management
- Coal and Its By-products
- Risk and Safety Analysis
- Aerosol Filtration and Electrostatic Precipitation
- Inhalation and Respiratory Drug Delivery
- Mine drainage and remediation techniques
- Polymer Nanocomposite Synthesis and Irradiation
- Geology and Environmental Impact Studies
National Institute for Nuclear, Chemical and Biological Protection
2015-2025
Radon gas is the largest source of public exposure to naturally occurring radioactivity. However, radon also a useful tracer for understanding atmospheric processes, assessing accuracy chemical transport models, and enabling integrated emissions estimates greenhouse gases. A sound metrological system low level observations therefore needed benefit atmospheric, climate radiation protection research communities. To this end, here we present new calibration method activity concentrations below...
The National Institute for Nuclear, Biological, and Chemical Protection, under the European project 16ENV10 MetroRADON (the metrology program innovation research, EMPIR), has developed unique equipment testing of measuring devices at low-level radon activity concentrations. consists particularly an airtight chamber (LLRCH) with inner volume 324 liters; a Rn-222 type RF 5 flow-through source Ra-226 4.955 kBq by Czech Metrological within above-mentioned project; pressure vessel as radon-free...
A collection of personal radiation shielding protective clothing, suitable for use in case accidents nuclear facilities or radiological emergency situations involving radioactive agents, was gathered and tested at the Nuclear Protection Department National Institute Nuclear, Chemical Biological Protection, Czech Republic. Attenuating qualities layers individual clothing were via spectra measurement x gamma rays, penetrating them. The rays originated from different radionuclide point sources,...
An interlaboratory comparison for European radon calibration facilities was conducted to evaluate the establishment of a harmonized quality level activity concentration in air and demonstrate performance when calibrating measurement instruments radon. Fifteen from 13 different countries participated. They represented levels metrological hierarchy: national metrology institutes designated institutes, authorities radiation protection participants universities. The by German Federal Office...
Journal Article Czech primary radon measurement equipment Get access Ivo Burian, Burian * National Institute for Nuclear, Chemical and Biological Protection, Kamenná 71, 262 31 Milín, Republic *Corresponding author: burian@sujchbo.cz Search other works by this author on: Oxford Academic PubMed Google Scholar Petr Otahal, Otahal Josef Vosahlik, Vosahlik Eliska Pilecka Radiation Protection Dosimetry, Volume 145, Issue 2-3, May 2011, Pages 333–336, https://doi.org/10.1093/rpd/ncr041 Published:...
A collection of personal protective equipment (PPE), suitable for use in case accident nuclear facilities or radiological emergencies, was gathered at the National Institute Nuclear, Chemical and Biological Protection, Czech Republic. The shielding characteristics various PPE materials were measured via narrow geometry spectral attenuation measurements with point radionuclide sources covering a broad range photon energies. Photon relative penetration relevant energies spectra principal...
The purpose of this manikin-based study was to determine the percentage penetrations nine CE-marked filtering facepiece respirator models (two samples from each) classes FFP1, FFP2, and FFP3 demonstrate by an independent measurement method disadvantages shortcomings currently valid European Norm (EN 149:2001) for facepieces. All facepieces were evaluated size-selectively in experimental chamber using charge-neutralized monodisperse ammonium sulfate 9 sizes ranging 20–400 nm count median...
At least 10 % of inhabitants in the Czech Republic are supplied with water from private sources (private wells, boreholes). With increasing cost water, number people using their own drinking will be likely to increase. According Decree State Office for Nuclear Safety about Radiation Protection 307/2002 as amended by 499/2005, guideline limit ('drinking public supply') radon concentration is 50 Bq·l−1. This does not apply water. Radon influences human health ingestion and also inhalation when...
During the traditional way of radiation field monitoring − walking measurements – is possible to encounter inaccessible or dangerous areas. For this case, National Institute for Nuclear, Chemical and Biological Protection (SUJCHBO) has created method aerial measurement ambient dose equivalent rate (ADER) using drone equipped with gamma-spectrometer. This paper presents two methods on estimation near-surface gamma based Drone gamma-spectrometer D230A. The D230A was first tested in a room...
An international comparison of continuous monitors measuring radon activity concentration was performed to validate the traceability European calibration facilities. It carried out by comparing secondary standards used these previous facilities, ranging from 100 Bq·m−3 300 Bq·m−3. Secondary were individually compared a reference device previously calibrated in atmosphere traceable primary standard. The intercomparison organized National Institute for Nuclear, Chemical, and Biological...
The combination of electrospun nanofibers and nanoparticles is opening up potential in the field nanocomposite materials. This paper presents a composite nanofibrous material for X-ray shielding purposes consisting polyvinyl butyral polymer matrix bismuth oxide nanoparticles. organic–inorganic considered this paper, produced via ex situ approach, attained high content to 95 wt %. inside was acquired application highly productive needleless electrospinning method. resulting flexible has drape...
The knowledge of the behaviour radioactive aerosol particles in uranium mine atmosphere is very important due to evaluation effective dose for miners. During research project SUJ200402-'Study natural long-lived radionuclides atmosphere', several measurement campaigns were performed last active Central Europe Rozna I. main purpose this paper characterisation which creating part airborne radioactivity atmosphere. present introduces results measurements stopes at 21st floor a depth ∼1100 m...
The activity size distribution of the Equilibrium-Equivalent Concentration (EER) 222Rn is one most important parameters for estimation radiation dose by inhalation radon decay products. A series measurements EER were performed screen diffusion battery in Radon-Aerosol chamber (10 m3) at National Institute Nuclear, Chemical, and Biological Protection (SUJCHBO). These different levels concentration. For this study, Graded Screen Array Diffusion Battery (GSA DB), developed SUJCHBO (based on...
Exposure to radon and its decay products is one of the three parts that create total effective dose uranium miners. Photons from gamma radiation exposition long-lived alpha emitters which are members family other two parts. The monthly miners in mine Rozna I (Czech republic) determined by personal dosemeter ALGADE, ensures continual individual monitoring all exposed dosemeters evaluated National Institute for Nuclear, Chemical Biological Protection Kamenna near Pribram. This paper describes...
Knowledge of the active size distribution radon daughters is one main parameters for determining effective dose from inhalation short-term decay products. However, this parameter crucial accurately an dose; there are currently very limited possibilities it. This paper describes laboratory validation a method activity products using Dekati ELPI+ cascade impactor and Graded Screen Array Diffusion Battery (GSA DB). Using nuclear track detectors placed on individual impaction plates impactor,...
Abstract The study aims to characterise the changes in elemental composition river sediments of streams influenced by mine waters enriched with radionuclides. took place vicinity Ostrava, a city located coal mining region Czech Republic, namely Upper Silesian Coal Basin. River and Karvinský potok Stružka were investigated. Field measurements made for ambient dose equivalent rate (ADER). Laboratory gamma spectrometry X-ray fluorescence used determine content radionuclides sediments. Water...
Abstract. More than 50 % of naturally occurring radiation exposure to the general public is due noble gas radon (222Rn) and its progenies, causing considerable health risks. Therefore, European Union has implemented Council Directive 2013/59/EURATOM measure 222Rn activity concentrations identify priority areas (RPAs) specify where countermeasures are most needed. Although measurements far spread across Europe, traceability International System Units (SI) still lacking for below 300 Bq m−3....
Abstract The radon issue has been known worldwide for dozens of years. Many scientific (ICRP Publication No. 137), technical (ICRU Report 88), and legislative (Council Directive 2013/59/EURATOM (EU-BSS)) documents have published in the last decade. More more attention is being paid to precise quantification determine concentration consequent effects various pollutants on human health worldwide. quality measurement variety techniques increase need unify procedures metrology continuity....
The aim of this study is to describe the experimental results external surface mechanical decontamination studied materials forming selected suits. Seven types personal protective suits declaring protection against radioactive aerosol contamination in different price ranges were for experiments. outcome compare efficiency a double-step process on various contamination. A comparison effectiveness same type suit, but chemical mixtures (140La water-soluble or water-insoluble compound), was performed.
Water is one of the most important resources for a human being; therefore, its quality should be properly tested. According to Council Directive No. 2013/51/EUROATOM, there shall established requirements general public health protection with regard radioactive substances in water intended consumption. This article summarises measurement results selected samples at 444 private drinking wells, which are not subject regular inspection terms Czech legislation.