Radon 222Rn w budynkach mieszkalnych Swieradowa Zdroju i Czerniawy Zdroju

• Autorzy: Pachocki K. A. , Gorzkowski B. , Rozycki Z. , Wilejczyk E. , Smoter J.
• Języki publikacji: PL

Abstrakty

PL

Oznaczano ilościowo stężenia radonu 222Rn w powietrzu w budynkach mieszkalnych miejscowości uzdrowiskowych Świeradowa Zdroju i Czerniawy Zdroju. Radon oznaczano metodą ciekłej scyntylacji cząstek alfa. Oszacowano dawki promieniowania jonizującego otrzymywane przez osoby zamieszkujące te budynki.

EN

Świeradrów Zdrój and Czerniawa Zdrój are located in Region Izera Block. A total of 789 radon passive dosimeters were distributed in 183 dwellings in these town Świeradów Zdrój and Czerniawa Zdrój to measure the indoor radon concentration in 1999. Three - five measurements were performed in each dwelling, one in the basement, and the others in the main bedroom, in the kitchen, in the bathroom, since these rooms are the most frequently occupied. In addition, the occupants of each dwelling were requested to answer a questionnaire in which a number of questions about the building, ventilation habits and other related aspects were formulated. A charcoal detectors (Pico-Rad system) were used in experiment. It is a passive short-term screening method of radon gas concentration measurements. The indoor radon level was found to range from 14,8 Bq/m3 to 5 723,9 Bq/m3. The arithmetic mean overall indoor concentration was 420,4 Bq/m3 and the geometric mean was 159,7 Bq/m3. The average concentration of indoor radon, which reflects the real risk for inhabitants, is 193,5 Bq/m3. The results hand a log-normal distribution. In Poland, an action level of 400 Bq/m3 was recommended for existing buildings and 200 Bq/m3 for newly built (after 1.01.1998) buildings. In about 23 % rooms the level of Rn-222 were above the top limit of 400 Bq/m3. The highest average concentrations were present in a basement (mean 919,9 Bq/m3). A decrease of average activity were observed at the upper levels: at the ground floor (225,2 Bq/m3) , at the first floor and at the higher floors (137,6 Bq/m3). The above results indicate that radon emission from the ground provides the main contribution to the radon concentration measured in dwellings indoors in Świeradów Zdrój and Czerniawa Zdrój. The effective dose to the population of the Świeradów Zdrój and Czerniawa Zdrój from indoor radon and its progeny can be derived from this data if we use an equilibrium factor of 0,4 between radon and its progeny and assuming an indoor occupation index of 0,8. Taking into account that a conversion coefficient of 1,1 mSv per mJ h m-3 is recommended in ICRP 65 for members of public, the measured average annual dose is then about 3,3 mSv per year.

Słowa kluczowe

PL

radon; Swieradow-Zdroj; Polska; promieniowanie jonizujace; budynki mieszkalne; oznaczanie; stezenie radonu; powietrze wewnetrzne; uzdrowiska

EN

radon; Swieradow-Zdroj town; Poland; ionizing radiation; residential building; determination; radon concentration; indoor air; health resort

• Wydawca: -
• Czasopismo: Roczniki Państwowego Zakładu Higieny
• Rocznik: 2000
• Tom: 51
• Numer: 3
• Opis fizyczny: s.291-298,wykr.,tab.,rys.,bibliogr.

Twórcy

autor

Pachocki K. A.

• Panstwowy Zaklad Higieny, 00-791 Warszawa, ul.Chocimska 24

autor

Gorzkowski B.

autor

Rozycki Z.

autor

Wilejczyk E.

autor

Smoter J.