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Wyszukujesz frazę "Radon-222" wg kryterium: Wszystkie pola


Tytuł:
Radon222 w wodach głębinowych z terenu województwa płockiego
Autorzy:
Pachocki, Krzysztof
Flakiewicz, Wiesław
Gorzkowski, Bohdan
Różycki, Zdzisław
Majle, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/967906.pdf
Data publikacji:
1998
Wydawca:
Towarzystwo Naukowe Płockie
Źródło:
Notatki Płockie. Kwartalnik Towarzystwa Naukowego Płockiego; 1998, 43, 4 (177)
0029-389X
Pojawia się w:
Notatki Płockie. Kwartalnik Towarzystwa Naukowego Płockiego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterizing urban pollution variability in Central Poland using radon-222
Autorzy:
Chambers, Scott D.
Podstawczyńska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/147872.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
aerosols
air quality
boundary layer
radon
stability
urban
Opis:
Four years of observations of radon, meteorology and atmospheric pollution was used to demonstrate the efficacy of combined diurnal and synoptic timescale radon-based stability classification schemes in relating atmospheric mixing state to urban air quality in Zgierz, Central Poland. Nocturnal radon measurements were used to identify and remove periods of non-stationary synoptic behaviour (13–18% of each season) and classify the remaining data into five mixing states, including persistent temperature inversion (PTI) conditions, and non-PTI conditions with nocturnal conditions ranging from well mixed to stable. Mixing state classifications were performed completely independently of site meteorological measurements. World Health Organization guideline values for daily PM2.5/PM10 were exceeded only under strong PTI conditions (3–15% of non-summer months) or often under non-PTI stable nocturnal conditions (14–20% of all months), when minimum nocturnal mean wind speeds were also recorded. In non-summer months, diurnal amplitudes of NO (CO) increased by the factors of 2–12 (3–7) from well-mixed nocturnal conditions to PTI conditions, with peak concentrations occurring in the morning/evening commuting periods. Analysis of observations within radon-derived atmospheric mixing ‘class types’ was carried out to substantially clarify relationships between meteorological and air quality parameters (e.g. wind speed vs. PM2.5 concentration, and atmospheric mixing depth vs. PM10 concentration).
Źródło:
Nukleonika; 2020, 65, 2; 59-65
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exhalation rate of radon-222 from concrete and cement mortar
Autorzy:
Perna, Allan Felipe Nunes
Paschuk, Sergei Anatolyevich
Corrêa, Janine Nicolosi
Narloch, Danielle Cristine
Barreto, Rafael Carvalho
Del Claro, Flávia
Denyak, Valeriy
Powiązania:
https://bibliotekanauki.pl/articles/147305.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cement mortar
concrete
exhalation rate
radon-222
Opis:
The main sources of radon in the air of dwellings are soil, building materials, and groundwater. This study aimed to determine the exhalation rate of 222Rn from samples made of concrete and cement mortars, as well as to evaluate by means of gamma spectrometry the hazard indexes associated with other radionuclides present in the studied samples of building materials. The results obtained allowed the comparison of the exhalation rate of radon using theoretical calculations based on one-dimensional and three-dimensional models. Measurements of the activity concentration of radon in air was performed by AlphaGuard radon detector. Furthermore, obtained results were compared with the measurements performed inside the concrete test cells. These test cells were built with the aim of simulating a dwelling in small dimensions and to evaluate indoor radon activity associated with concrete. Consequently, the obtained results of radon exhalation rate, in becquerel per meter squared per hour, for the concrete was 2.55 ± 0.03 Bq•h–1•m–2 for the 1D model and 0.461 ± 0.008 Bq•h–1•m–2 for the 3D model. The exhalation rate of radon, for the cement mortar was 1.58 ± 0.03 Bq•h–1•m–2 for the 1D model and 0.439 ± 0.011 Bq•h–1•m–2 for the 3D model. The indoor concentration of 222Rn from the test cell was 112 ± 9 Bq/m3 . These values were below the limit of 300 Bq/m3 recommended by the International Commission on Radiological Protection (ICRP) and <148 Bq/m3 , the limit recommended by the US Environmental Protection Agency (US EPA). Even so, these values should be the subject of concern since that activity is related only to the contribution of concrete walls.
Źródło:
Nukleonika; 2020, 65, 3; 65-72
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of radon (222Rn) and thoron (220Rn) concentration with a single scintillation cell
Autorzy:
Machaj, B.
Urbański, P.
Bartak, J.
Powiązania:
https://bibliotekanauki.pl/articles/146829.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon
thoron
measurement
scintillation cell
Opis:
. A single scintillation cell (ö 54 × 74 mm) is used for the measurement of radon and thoron. The radon and thoron laden air is filtered and forced to flow at 1 dm3/min through the scintillation cell in the period of 1 10 min. The count number from alpha radiation is registered in the periods of 3 10 min and 20 30 min. Two values of detection and deposition efficiency of alpha radiation are used for radon (at air flow and air at rest in the cell) and for thoron. Measurements of radon laden air and thoron laden air showed good agreement between the reference concentration and the measured concentration, not worse than 1% for radon and not worse than 2% for thoron. Combination of radon + thoron concentration showed also a small interference ("cross talk") not worse than 1%.
Źródło:
Nukleonika; 2007, 52, 4; 167-171
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Występowanie radonu 222 Rn w wodach leczniczych
Occurrence of radon 222 Rn in curative waters
Autorzy:
Pachocki, K.A.
Wieprzowski, K.
Bekas, M.
Rozycki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/876604.pdf
Data publikacji:
2009
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Radon jest dobrze udokumentowanym czynnikiem ryzyka indukcji nowotworów. Źródłem obecności radonu 222Rn w wodzie jest jego prekursor w promieniotwórczym szeregu uranowo-radowym izotop radu 226Ra. Celem pracy było określenie poziomu występowania radonu 222Rn w wodach leczniczych w Polsce. Przeprowadzono pomiary ponad 220 próbek wód leczniczych. Radon oznaczano metodą ciekłej scyntylacji cząstek alfa i beta. Zakres zmierzonych stężeń zawierał się od 0,90 do 193,10 Bq/dm3. Średnia arytmetyczna ze wszystkich uzyskanych wyników wyniosła 14,51 Bq/dm3. Wartość średnia stężenia radonu w próbkach pobranych z terenu województw śląskiego i dolnośląskiego była o rząd wielkości wyższa od obserwowanych stężeń w próbkach pobranych z pozostałych obszarów objętych badaniami. Tylko dwie ze zbadanych próbek wód leczniczych, pochodzące z terenu województwa dolnośląskiego tj. woda z ujęcia J-300 z Jedliny Zdrój (116,1 Bq/dm3) oraz woda z ujęcia „Marta” w Szczawnie Zdroju (193,1 Bq/dm3) wykazały aktywność promieniotwórczą powyżej 74 Bq/dm3 i mogą być z tego powodu zaklasyfikowane jako wody radonowe. Wartości te są powyżej zalecanego przez Unię Europejską (Recommendation 2001/928/Euratom) limitu dla wody do picia, wynoszącego 100 Bq/dm3. Dotychczas zarówno w ustawodawstwie krajowym jak i UE nie określono maksymalnego dopuszczalnego stężenia radonu w wodach leczniczych.
Radon is one of the best known human carcinogens. Natural radon (222Rn) is formed by decay of uranium (238U), directly of radium (226Ra). The aim of this study was to determine the activity concentration of radon in curative waters in Poland. The measurements were performed using alpha and beta liquid scintillation method. Over 220 water samples from Polish spas have been analyzed. Arithmetic mean of radon concentration for curative waters was found to be 14.51 Bq/m3 within the range between 0.90 Bq/m3 to 193.10 Bq/m3. The average concentrations of radon-222 were ten times higher in water from śląskie and dolnośląskie voivodeship than other voivodeships. In two sampls: water from intake J-300 in Jedlina Zdrój (116.1 Bq/dm3) and intake Marta in Szczawno Zdrój (193.1 Bq/dm3) the level of radon 74 Bq/dm3 has been reached and those samples could be classified as radon water. There are no limits for the radon concentration levels in curative waters. There are only recommendation of the Commission of the European Communities 2001/928/Euratom on the protection of the public against exposure to radon in drinking water supplies (100 Bq/l).
Źródło:
Roczniki Państwowego Zakładu Higieny; 2009, 60, 2
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon 222Rn in drinking water of West Pomeranian Voivodeship and Kuyavian-Pomeranian Voivodeship, Poland
Autorzy:
Wieprzowski, K.
Bekas, M.
Waśniewska, E.
Wardziński, A.
Magiera, A.
Powiązania:
https://bibliotekanauki.pl/articles/146558.pdf
Data publikacji:
2018
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
drinking water
ionizing radiation
Kuyavian-Pomeranian Voivodeship
preliminary monitoring of radioactivity
radon-222 concentration
West Pomeranian Voivodeship
woda pitna
promieniowanie jonizujące
województwo kujawsko-pomorskie
wstępne monitorowanie radioaktywności
stężenie radonu-222
województwo zachodniopomorskie
Opis:
Radon Rn-222 is a commonly occurring natural radionuclide found in the environment from uranium- -radium radioactive series, which is the decay product of radium Ra-226. The presence of radon carries negative health effects. It is, in fact, classifi ed as a carcinogen, and therefore, it is necessary to continuously monitor its concentration. The aim of this study was to determine the level of radon-222 concentration in water intended for human consumption in the two voivodeships of Poland: West Pomeranian and Kuyavian-Pomeranian. Measurements were performed for more than 60 intakes. The level of radon was measured by using the liquid scintillation counting method. The range of measured radon concentration in the water from the West Pomeranian Voivodeship was from 0.90 to 11.41 Bq/dm3 with an average of 5.01 Bq/dm3, while that from the Kuyavian-Pomeranian Voivodeship was from 1.22 to 24.20 Bq/dm3 with an average of 4.67 Bq/dm3. Only in three water intakes, the concentration of radon-222 exceeded the value of 10 Bq/dm3. The obtained results allowed to conclude that population exposure associated with radon-222 in water is negligible and there is no need to take further action. In the case of three intakes where a higher concentration of radon was found, the potential exposure was low.
Źródło:
Nukleonika; 2018, 63, 2; 43-46
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intercomparison of radon CR-39 detector systems conducted in CLORs calibration chamber
Autorzy:
Mamont-Cieśla, K.
Stawarz, O.
Karpińska, M.
Kapała, J.
Kozak, K.
Grządziel, D.
Chałupnik, S.
Chmielewska, I.
Olszewski, J.
Przylibski, T. A.
Żebrowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/148842.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon-222
CR-39 track detector
intercomparison
RadoSys
Opis:
Six radon laboratories, which perform indoor radon measurements to jointly investigate temporal variations of radon concentration in houses in a couple of regions in Poland, participated in the intercomparison exercise. There are involved three commercially available Hungarian RadoSys systems and four own laboratory methods. All of them are based on the etched-track CR-39 detectors. The intercomparison was conducted in a calibration laboratory of the Central Laboratory for Radiological Protection (CLOR), Warsaw, Poland, accredited by the Polish Center for Accreditation (previously AP 101, at present AP 057). Comparison measurements were performed during three expositions in the CLOR’s radon calibration chamber under controlled normal climatic conditions and steady radon concentration. The results were referred to the value of the radon concentration determined by AlphaGUARD monitor traceable to the primary 222Rn standard in Physikalisch-Technische Bundesanstalt (PTB), Braunchweig, Germany. The mean performance ratio defined as a ratio of the reference to participant’s result range from 0.88 to 1.31.
Źródło:
Nukleonika; 2010, 55, 4; 589-593
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thorium nuclear fuel - thoron aspect
Autorzy:
Zagórski, Z. P.
Głuszewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/148763.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
CR-39
nuclear fuel
radon-220
radon-222
thorium fuel
thoron
Opis:
The communication reports a serious complication connected with preparation, storage and transportation of fuel for thorium and uranium/thorium nuclear reactors. Whereas uranium fuel of any degree of enrichment is free from radium, which produces radon-222, thorium itself produces thoron (radon-220). Measurement of thoron by a routine ionization-chamber device around a small sample of 2 g thorium dioxide shows already the health endangerment situation. The presence of thoron is also confirmed by a typical solid state dosemeter (polymer CR-39), exposed to the air around ThO2 and etched afterwards with warm NaOH solution. The unavoidable presence of thoron can cause increase of price of production of nuclear fuel, demanding special approach to the method of manufacture.
Źródło:
Nukleonika; 2010, 55, 3; 407-408
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activity concentration of radon-222 in the buildings of the Opole University
Aktywność radonu-222 w budynkach Uniwersytetu Opolskiego
Autorzy:
Narolska, J.
Piątek, M.
Dołhańczuk-Śródka, A.
Powiązania:
https://bibliotekanauki.pl/articles/127267.pdf
Data publikacji:
2014
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
Rn-222 activity
AlphaGUARD spectrometer
Rn-222
aktywność
spektrometr AlphaGUARD
Opis:
Rn-222 activity concentration is on average several times higher in confined spaces than outside. Given that approx. 75% of the time we spend indoors, there is a need to draw attention to the activity concentration of Rn-222 in rooms in which we live. The paper presents the results of measurements of Rn-222 activity concentration in the period September-October 2014, in the buildings of the Opole University. The measurements were performed using a portable spectrometer AlphaGUARD. In the tested buildings Rn-222 activity concentrations differs in the ranged from 4 to 38 Bq/m3. These differences may be related to the local properties of the soil, the properties of the materials used in buildings construction and the method of building ventilation. The measurements of Rn-222 activity concentrations in the buildings of the Opole University showed no potential health risks resulting from radon.
Aktywność Rn-222 w pomieszczeniach zamkniętych jest średnio kilkakrotnie większa niż na zewnątrz. Ponieważ ok. 75% czasu spędzamy w pomieszczeniach zamkniętych, istnieje potrzeba zwrócenia uwagi na aktywność Rn-222 w pomieszczeniach, w których przebywamy. W pracy przedstawiono wyniki pomiarów aktywności Rn-222, w okresie wrzesień-październik 2014 r., w budynkach Uniwersytetu Opolskiego. Pomiary wykonano za pomocą przenośnego spektrometru AlphaGUARD. Zaobserwowano zróżnicowane aktywności Rn-222 w badanych budynkach, które mieściły się w przedziale od 4 do 38 Bq/m3. Różnice te mogą być związane z lokalnymi właściwościami gruntu, właściwościami wykorzystanych materiałów budowlanych, a także sposobem wentylacji. Pomiary aktywności Rn-222 w budynkach Uniwersytetu Opolskiego wykazały brak potencjalnego zagrożenia zdrowia, wynikającego z zanieczyszczenia radonem.
Źródło:
Proceedings of ECOpole; 2014, 8, 2; 423-427
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon on the ground floor in the buildings of pre-university education in Montenegro
Autorzy:
Vukotic, Perko
Zekic, Ranko
Andjelic, Tomislav
Svrkota, Nikola
Djurovic, Andrija
Dlabac, Aleksandar
Powiązania:
https://bibliotekanauki.pl/articles/148189.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ground-floor rooms
pre-university institutions
Radon-222
univariate and multivariate analysis
Opis:
A national radon survey was performed recently in all buildings of pre-university education in Montenegro. During the school year 2016/2017, radon (222Rn) was measured with passive detectors (Radosys, RSFV type) in 2855 ground-floor rooms of 468 buildings. The average 9-month radon activity concentrations above the level of 300 Bq/m3 were found in 728 rooms, which belong to 213 buildings, while in 111 rooms, belonging to 47 buildings, they were above 1000 Bq/m3 . Radon concentrations in the educational buildings, averaged over all sampled ground-floor rooms in a building, range from 16 Bq/m3 to 2810 Bq/m3 , with arithmetic mean (AM) = 275 Bq/m3 . They follow a log-normal distribution with geometric mean (GM) = 174 Bq/m3 and geometric standard deviation (GSD) = 2.58. There are 135 buildings with average indoor radon concentrations on the ground floor above 300 Bq/m3 and 18 buildings where they are above 1000 Bq/m3 . The influence of the nine factors (climate, urban/rural area, age of building, number of stories, building materials, basement, foundation slab, window frames, and heating) on radon concentrations in the buildings was analysed by univariate (UVA) and multivariate (MVA) methods. The univariate analysis revealed the significant relationship of the four factors: age of buildings, basement, building materials, and window frames with radon concentrations on the ground floor in the buildings, while multivariate analysis added to those factors urban/rural area and number of stories, but excluded building materials as a factor infl uencing signifi cantly radon concentrations.
Źródło:
Nukleonika; 2020, 65, 2; 53-58
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal and diurnal variation of outdoor radon (222Rn) concentrations in urban and rural area with reference to meteorological conditions
Autorzy:
Podstawczyńska, A.
Kozak, K.
Pawlak, W.
Mazur, J.
Powiązania:
https://bibliotekanauki.pl/articles/148896.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
outdoor radon (222Rn) concentration
urban climate
seasonal variation
diurnal variation
meteorological parameters
Opis:
The objective of the study was to investigate temporal variability of outdoor radon (222Rn) concentration registered in the center of Łódź (urban station), at Ciosny (rural station) and Kraków (suburban station) in relation to meteorological parameters (i.e. air temperature, temperature vertical gradient, wind speed, soil heat flux, volumetric water content in soil) with special consideration of urban-rural differences. Continuous measurements of 222Rn concentration (at 60 min intervals) were performed at a height of 2 m above the ground using AlphaGUARDŽ PQ2000PRO (ionization chamber) from January 2008 to May 2009. 222Rn levels were characterized by a diurnal cycle with an early morning maximum and a minimum in the afternoon. The well-marked 24 h pattern of radon concentration occurred in summer at anticyclonic weather with cloudless sky, light wind and large diurnal temperature ranges. The urban measurement site was characterized by the lowest atmospheric 222Rn concentration and an urban-rural differences of radon levels increased from winter to summer and during the nighttime periods. The maximum contrasts of 222Rn levels between Łódź and Ciosny, reaching – 30 Bqźm–3, were registered in June and July during the urban heat island (UHI) phenomenon (a positive thermal anomaly of a city if compared to rural area) and strong thermal inversion near the ground in the rural area.
Źródło:
Nukleonika; 2010, 55, 4; 543-547
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dose assessment and radioactivity of the mineral water resources of Dimeh springs in the Chaharmahal and Bakhtiari Province, Iran
Autorzy:
Shahbazi-Gahrouei, D.
Saeb, M.
Powiązania:
https://bibliotekanauki.pl/articles/146762.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radium-226
radon-222
radioactivity
effective dose
Dimeh springs
Chaharmahal and Bakhtiari
Opis:
. One of the main sources of public exposure from natural radioactivity is radium and radon and its short lived decay products. The aim of this study is focused on determining the concentration of mentioned radionuclides in the mineral water resources in one of the highest altitude regions (Zagros Mountains), the Chaharmahal and Bakhtiari province, in South-West Iran, namely the Dimeh springs. Eighty drinking spring water samples were taken from the Dimeh springs (ten samples for each spring) to determine radium-226 (226Ra) and radon-222 (222Rn) concentrations using the emanation method and a liquid scintillation counting method, respectively. The results of this study showed that the effective dose from the consumption of drinking water of Dimeh springs (6.4 žSv/y) is not comparable to the other annual effective dose such as inhalation of radon and its products in cosmic and terrestrial rays published by one of the authors previously. Also, the annual effective dose measured here is much lower than the worldwide mean value 0.45 mSv reported by USCEAR, 2000 and is also low enough and below the proposed limits in other countries and this is the reason why this sources of water may be considered as safe drinking water in the region.
Źródło:
Nukleonika; 2008, 53, 1; 31-34
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of Radon-222 Concentrations in Selected Soil Samples in Al-Mothafeen Area (Kerbala, Iraq) by Using the CN-85 Detector
Autorzy:
Ibrahim, Abrrar Abbas
Hashim, Abdalsattar Kareem
Abojassim, Ali Abid
Powiązania:
https://bibliotekanauki.pl/articles/2088173.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
alpha emitters
222Rn
226Ra
238U
annual effective dose
soil
CN-85
Kerbala University
Opis:
In this work, alpha emitters in the twenty soil samples in Al-Mothafeen sites were measured using the CN-85 detectors. The results show that the average values of radon concentration in the air space of the tube and in the sample were 163.15±3.37 Bq/m3 and 5090.54±155.3 Bq/m3, respectively, while the results of annual effective dose were varied from 10.2±0.3 mSv/y to 2.1±0.1 mSv/y with a mean value of 4.1±0.2 mSv/y, radium content were varied from 0.3±0.06 Bq/kg-1 to 0.06±0.02 Bq/kg with a mean value of 0.12±0.03 Bq/kg, and uranium contractions were varied from 9.29±0.33 Bq/kg to 1.90±0.15 Bq/kg with an average of 3.72±0.21 Bq/kg. Also, the average values of mass and surface exhalation rates were 0.95±8.64 mBq/kg.h and 44.59±0.79 mBq/m2.h, respectively. The results were within the normal limits of radiation, according to the International Commission on Radiological Protection (ICRP).
Źródło:
Polish Journal of Soil Science; 2021, 54, 2; 139-153
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon-based technique for the analysis of atmospheric stability : a case study from Central Poland
Autorzy:
Podstawczyńska, A.
Chambers, S. D.
Powiązania:
https://bibliotekanauki.pl/articles/146556.pdf
Data publikacji:
2018
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon-222
Central Poland
stability classification
stable nocturnal boundary layer
atmospheric mixing state
Polska centralna
klasyfikacja stabilności
Opis:
An economical and easy-to-implement technique is outlined by which the mean nocturnal atmospheric mixing state (“stability”) can be assessed over a broad (city-scale) heterogeneous region solely based on near- -surface (2 m above ground level [a.g.l.]) observations of the passive tracer radon-222. The results presented here are mainly based on summer data of hourly meteorological and radon observations near Łodź, Central Poland, from 4 years (2008–2011). Behaviour of the near-surface wind speed and vertical temperature gradient (the primary controls of the nocturnal atmospheric mixing state), as well as the urban heat island intensity, are investigated within each of the four radon-based nocturnal stability categories derived for this study (least stable, weakly stable, moderately stable, and stable). On average, the most (least) stable nights were characterized by vertical temperature gradient of 1.1 (0.5)⁰C·m-1, wind speed of ~0.4 (~1.0) m·s-1, and urban heat island intensity of 4.5 (0.5)⁰C. For sites more than 20 km inland from the coast, where soils are not completely saturated or frozen, radon-based nocturnal stability classification can significantly enhance and simplify a range of environmental research applications (e.g. urban climate studies, urban pollution studies, regulatory dispersion modelling, and evaluating the performance of regional climate and pollution models).
Źródło:
Nukleonika; 2018, 63, 2; 47-54
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zbiornika retencyjno-dozującego oraz zwałowiska skały płonnej Kopalni Węgla Kamiennego Brzeszcze na poziom dawki od radonu 222Rn otrzymywanej przez okolicznych mieszkańców
Impact of the retention pond and gangue repository of Brzeszcze coal mine on the level of dose received from radon 222Rn by the local inhabitants
Autorzy:
Śleziak, M.
Duliński, M.
Powiązania:
https://bibliotekanauki.pl/articles/167171.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
zbiorniki retencyjne
zagrożenie radiacyjne
dawka promieniowania jonizującego
radon 222Rn
retention pond
radiation hazard
ionizing radiation dose
Opis:
W ciągu 35 lat użytkowania zbiornika retencyjno-dozującego „Brzeszcze” zgromadzono w jego osadach znaczne ilości substancji promieniotwórczych, głównie radu. Celem stwierdzenia wpływu obecności radonu – produktu rozpadu radu na poziom zagrożenia radiacyjnego dla ludności zamieszkałej w sąsiedztwie, wykonano szereg pomiarów stężenia radonu 222Rn (aktywności właściwej) w powietrzu wokół zbiornika i nad odkrytymi osadami dennymi. Pomiary te wykonano przenośnym monitorem radonowym PYLON AB – 5. Ponadto, w części zachodniej miasta wykonano analizy stężenia radonu przy wykorzystaniu stacjonarnego stanowiska pomiarowego, sprzężonego z aparaturą pozwalającą na rejestrację podstawowych parametrów meteorologicznych. Obserwowane stężenia radonu 222Rn w powiązaniu z podstawowymi parametrami meteorologicznymi pozwalają na stwierdzenie, że radon z okolic zbiornika jest przenoszony wraz z wiatrem nad zamieszkałe tereny miasta. Prezentowane wyniki badań mają na celu pokazanie rejestrowanych poziomów stężeń radonu oraz wynikających z jego obecności przyczynków do dawki promieniowania otrzymywanej przez okolicznych mieszkańców.
During the 35 years of exploitation of the Brzeszcze retention pond a significant amount of radioactive elements, mainly radium 226Ra, accumulated in its bottom sediments. A series of both field and laboratory measurements were performed to determine the influence of radon 222Rn emanation (which is the daughter of radium 226Ra) on the level of radiation hazard which inhabitants in the vicinity of the pond may be exposed to. Measurements were carried out in the atmospheric air and over the sediments by the PYLON AB-5 monitor. Additionally, in the western part of Brzeszcze city, the activity concentration of radon 222Rn in the atmosphere was measured using a stationary installation. It was coupled with apparatus registering basic meteorological parameters. Investigations have shown that radon from the pond and adjacent gangue repository is transported by wind above the inhabited area of the city. Based on field and stationary measurements the contribution from 222Rn to the radiation dose received by local residents has been determined.
Źródło:
Przegląd Górniczy; 2018, 74, 11; 51-61
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł

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