BRUNILDA DACI INSTITUTE OF APPLIED NUCLEAR PHYSICS TIRANA-ALBANIA. KOZETA BODE Responsible person for Radon Measurement in Albania

Transcription

1 BRUNILDA DACI INSTITUTE OF APPLIED NUCLEAR PHYSICS TIRANA-ALBANIA KOZETA BODE Responsible person for Radon Measurement in Albania Tallinn, Estonia, May

2 CONTENT OF THE PRESENTATION INTRODUCTION REGULATION REGARDING TO RADON CONCENTRATION METHOD OF MEASUREMENT OF RADON CONCENTRATION INTERCOMPARISON OF THE PASSIVE METHOD SURVEY OF INDOOR RADON IN ALBANIA MAP AND RESULTS RECOMMENDATIONS Tallinn, Estonia, May

3 REGULATION REGARDING TO RADON CONCENTRATION Based on the Law No date 9/11/1995 on Protection from the ionising radiation It was approved Regulations for radon concentration, No. 591, dated , by the Decision of Council of Ministers The object of these Regulations was to define the reference levels for the concentration of radon in workplaces and dwellings and for the activity concentration of radionuclides in water intended for human consumption, building materials etc. Tallinn, Estonia, May

4 REGULATION REGARDING TO RADON CONCENTRATION Maximum of radon concentration allowed in residential, public buildings and workplaces. In new buildings the average annual radon concentration in the domestic environments should be no more than 200Bq/m3. The annual average of radon concentration in domestic environments constructed before year 2000 should be no more than 400 Bq/m3. Tallinn, Estonia, May

5 NEW REGULATION REGARDING TO RADON CONCENTRATION DCM No. 957, date on «Reference levels and control measures of indoor Radon concentration and other radionuclides concentration in commodities» Article 3: Radon action plan -RPC shall establish a national program addressing long-term risks from radon exposure in dwellings, public buildings and workplaces. -RPC will identify the areas where the radon concentration (as annual average) in a significant number of buildings is expected to exceed the reference levels given in this Regulation. -Radon ingress into new buildings shall be limited so as the reference levels given in this Regulation are not exceeded. Article 4: Radon concentration in workplaces The annual average concentration of radon in the air inside workplaces shall not exceed 300 Bq/m3. Tallinn, Estonia, May

6 RADON MEASUREMENTS PASSIVE METHOD - Nuclear track detectors (SSNTD) CR 39 - Plastic film (allyl diglycol carbonate) - Time of exposure: 3-4 months Tallinn, Estonia, May

7 RADON MEASUREMENTS PASSIVE METHOD - Chemically etching: in 6 M NaOH - at temperature of C, for 14 h Tallinn, Estonia, May

8 RADON MEASUREMENTS PASSIVE METHOD - Counting of the tracks with dixhital microscope, Type OLYMPUS MIC-D -Calculation of Radon concentration (Bq/m3) Tallinn, Estonia, May

9 INTERCOMPARISON OF THE PASSIVE METHOD International Radiation Protection Association Intercomparison according ISO Thermal waters, Lurisia spa (Cuneo, Italy, 2014) It s in an excavation site where are present high concentrations of uranium and radon in water and air Tallinn, Estonia, May

10 LOCATION FOR ALL DETECTORS Location F2 for 20 our detectors Tallinn, Estonia, May

11 RESULTS FROM THE INTERCOMPARISAON Tallinn, Estonia, May

12 FIRST MEASUREMENTS OF RADON IN WORKPLACES IN ALBANIA National Project Financed by Government of Albania November 1999 February 2000 The aim of the project: Measurement of Radon concentration in: - ordinary workplaces like office building; -workplaces in buildings with public access like schools, kindergartens. In total: -38 schools -5 kindergartens - 61 workplaces Tallinn, Estonia, May

13 DISTRIBUTION OF THE DETECTORS FOR RADON MEASUREMENT IN WORKPLACES Tallinn, Estonia, May

14 THE RESULTS OF MEASUREMENTS OF RADON IN SCHOOLS IN ALBANIA Tallinn, Estonia, May

15 THE RESULTS OF MEASUREMENTS OF RADON IN ORDINARY OFFICE IN ALBANIA Tallinn, Estonia, May

16 THE RESULTS OF MEASUREMENTS OF RADON IN TIRANA CITY Tallinn, Estonia, May

17 NATIONAL INDOOR RADON SURVEY IN ALBANIA The preliminary map was created on 2003 Are monitored 32 cities In total: 468 dwellings and workplaces 312 measurements with active method from the Institute of Geosciences 156 measurements with passive method from Institute of Nuclear Physics Tallinn, Estonia, May

18 IAEA SUPPORT IAEA TC Project, ALB/9/008, Titled: Upgrading of the Indoor Radon Monitoring Capabilities in Albania, Distributed 400 detectors in 18 cities Based on the discussions with IAEA experts it is intended to study some principal areas of the Albania, which: 1. Have been identified as areas with high radon gas trend, by earlier studies 2. Have a greater population density 3. That not have been studies before Tallinn, Estonia, May

19 IAEA SUPPORT Clasification of the study areas Areas with high density of population Areas that are with high Radon gas trend Areas that not have been studied before Tallinn, Estonia, May

20 MEASUREMENT OF INDOOR RADON CONCENTRATION IN WORKPLACES During February 2013-May 2014, are carried out measurements of Radon concentration in workplaces - for 13 cities of Albania (biggest cities), In total: schools -6 kindergartens -48 workplaces Tallinn, Estonia, May

21 DISTRIBUTION OF THE DEDECTORS FOR RADON MEASUREMENT IN WORKPLACES Tallinn, Estonia, May

22 THE RESULTS OF MEASUREMENTS OF RADON IN SCHOOLS IN ALBANIA Tallinn, Estonia, May

23 THE RESULTS OF MEASUREMENTS OF RADON IN SCHOOLS IN ALBANIA Results for radon indoor concentration in 10 schools with values: Bq/m 3 Results for radon indoor concentration in 13 schools with values: Bq/m 3 Tallinn, Estonia, May

24 THE RESULTS OF MEASUREMENTS OF RADON IN ORDINARY OFFICE Tallinn, Estonia, May

25 THE RESULTS OF MEASUREMENTS OF RADON IN TIRANA CITY Tallinn, Estonia, May

26 DATA BASE (EXEL -FILE) Tallinn, Estonia, May

27 GEOGRAPHICAL DISTRIBUTION OF INDOOR RADON IN DWELLINGS IN ALBANIA In this map are reported the results obtained in the first stage of indoor radon survey involving 247 measurements and the survey strategy adopted. The preliminary information on approximately 10% of the territory, including the biggest cities in Albania Verbania Italy, 9-13 November

28 THE FREQUENCY DISTRIBUTION OF INDOOR RADON CONCENTRATION IN DWELLINGS The indoor radon survey is conducted from , in 10 regions (18 districts) of Albania, 247 dwellings are investigated by means of SSNTD CR 39 passive detectors The distribution of Indoor Radon Concentration (IRnC) is in the range from 14 to 1238 Bq m -3 Verbania Italy, 9-13 November

29 SOME CURRENT ACTIVITIES TO REDUCING RADON LEVELS IN EXISTING BUILDINGS 1. -Informthe relevant institutions - Ministry of Environmental - Ministry of Education - Ministry of Health 2. -Informthe interested institutions for measurements in ordinary workplaces like office building, etc. Tallinn, Estonia, May

30 SOME CURRENT ACTIVITIES TO REDUCING RADON LEVELS IN EXISTING BUILDINGS (corrective actions) Recommendationsto the above mentioned Institutions in order to take measures to reduce radon concentration by making several interventions: 1. Sealing of floors and walls 2. Sealing of cracks between the walls of the basement due to the discharge of the sink or the basement floor. 3. Sealing of cracks in the floor 4. Increasing indoor ventilation 5. The best isolation of water pipes Tallinn, Estonia, May

31 CONCLUSIONS 1. For the Tirana s schools resulting with high values of Radon, the measurements will be repeated several times and detailed studies are needed. 2. The work will continue in the future to increase significantly the number of measurements. 3. Problem, as always, financial issues. Tallinn, Estonia, May

32 THANK YOU FOR YOUR ATTENTION Tallinn, Estonia, May