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Wednesday, May 16, 2012IRPA 13 Glasgow Monitoring of Radionuclides in the Air in the Czech Republic after the Fukushima NPP Accident Miroslav Hyza et Al.

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Presentation on theme: "Wednesday, May 16, 2012IRPA 13 Glasgow Monitoring of Radionuclides in the Air in the Czech Republic after the Fukushima NPP Accident Miroslav Hyza et Al."— Presentation transcript:

1 Wednesday, May 16, 2012IRPA 13 Glasgow Monitoring of Radionuclides in the Air in the Czech Republic after the Fukushima NPP Accident Miroslav Hyza et Al. National Radiation Protection Institute

2 Wednesday, May 16, 2012IRPA 13 Glasgow 10 Measuring sites 4 laboratories Aerosols, gases, fallout Filter 1x week Filter 1x week Charcoal sorbent 1x month Charcoal sorbent 1x month Fallout 1x month Fallout 1x month Czech Radiation Monitoring Network air contamination measuring sites Dukovany and Temelin NPPs

3 Wednesday, May 16, Charcoal sorbent cartridge 120 m 3 /h 900 m 3 /h Pirrko - wet/dry fallout collection Sampling equipment 12 m 3 /h IRPA 13 Glasgow

4 Wednesday, May 16, 2012IRPA 13 Glasgow HPGe gamma spectrometry Marinelli, beakers, filters detection limit for Cs137 10E-7 Bq/m 3 Radiochemical analysis (Pu, Sr) detection limit for Sr 90: 3E-8 Bq/m 3 detection limit Pu : 2E-10Bq/m 3

5 Wednesday, May 16, 2012 Range of values IRPA 13 Glasgow T ef = 3.5 days T ef = 3.7 days T ef = 6.5 days T ef = 7.1 days

6 Wednesday, May 16, 2012IRPA 13 Glasgow Nuclide Max. activity [µBq/m 3 ] Date of maximum Te 129m I 131 – particulate I gaseous Te I Cs Cs Cs Ba La Sr 90, Pu 238 a Pu 239, 240 – background level Am 241 a Cm 242 – not found Natural radionuclides: Be 7 : max µBq/m 3 (3000 µBq/m 3 ) Be 7 : max µBq/m 3 (average µBq/m 3 ) Pb 210 : max 2000 µBq/m 3 (average µBq/m 3 Pb 210 : max 2000 µBq/m 3 (average µBq/m 3 )

7 Wednesday, May 16, 2012IRPA 13 Glasgow

8 Wednesday, May 16, vs in the Czech Republic (average values) IRPA 13 Glasgow Nuclide I Bq/m Bq/m 3 Cs Bq/m Bq/m 3 Maximal observed values

9 Wednesday, May 16, 2012IRPA 13 Glasgow 1986 vs in the Czech Republic Effective dose0.5 mSv3.4E-5 mSv (88% I 131) Fallout Cs Bq/m – 3 Bq/m 2 I 131 gas/total ratioCca – 0.9 Cs 137/ Cs

10 National Radiation Protection Institute Thank you for your attention Wednesday, May 16, 2012IRPA 13 Glasgow


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