wednesday, may 16, 2012irpa 13 glasgow monitoring of radionuclides in the air in the czech republic...
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![Page 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](https://reader035.vdocuments.us/reader035/viewer/2022081602/5519ef5f5503464c588b4613/html5/thumbnails/1.jpg)
IRPA 13 Glasgow Wednesday, May 16, 2012
Monitoring of Radionuclides in the Air in the Czech Republic after the Fukushima NPP Accident
Miroslav Hyza et Al.
National Radiation Protection Institute
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IRPA 13 Glasgow Wednesday, May 16, 2012
10 Measuring sites4 laboratoriesAerosols, gases, fallout
• Filter 1x week• Charcoal sorbent 1x month• Fallout 1x month
Czech Radiation Monitoring Network
air contamination measuring sites
Dukovany and Temelin NPPs
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IRPA 13 Glasgow Wednesday, May 16, 20123Charcoal sorbent cartridge
120 m3/h
900 m3/h
Pirrko - wet/dry fallout collection
Sampling equipment
12 m3/h
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IRPA 13 Glasgow Wednesday, May 16, 2012
HPGe gamma spectrometryMarinelli, beakers, filtersdetection limit for Cs137 10E-7 Bq/m3
Radiochemical analysis (Pu, Sr)detection limit for Sr 90: 3E-8 Bq/m3
detection limit Pu 239+240: 2E-10Bq/m3
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IRPA 13 Glasgow
Wednesday, May 16, 2012
21/3 31/3 10/4 20/4 30/4 10/5 20/5 30/5 9/61E-7
1E-6
1E-5
1E-4
1E-3
1E-2
I 131 - gaseous fraction
Date (2011)
Ac
tiv
ity
[B
q/m
3]
21/3 31/3 10/4 20/4 30/4 10/5 20/5 30/5 9/61E-7
1E-6
1E-5
1E-4
1E-3
1E-2
I 131 - particulate fraction
Date (2011)
Ac
tiv
ity
[B
q/m
3]
21/3 31/3 10/4 20/4 30/4 10/5 20/5 30/5 9/61E-7
1E-6
1E-5
1E-4
1E-3
1E-2
Cs 134
Date (2011)
Ac
tiv
ity
[B
q/m
3]
21/3 31/3 10/4 20/4 30/4 10/5 20/5 30/5 9/61E-7
1E-6
1E-5
1E-4
1E-3
1E-2
Cs 137
Date (2011)
Ac
tiv
ity
[B
q/m
3]
Range of values
Tef = 3.5 days
Tef = 3.7 days
Tef = 6.5 days
Tef = 7.1 days
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IRPA 13 Glasgow Wednesday, May 16, 2012
Nuclide Max. activity [µBq/m3]
Date of maximum
Te 129m 70 29.3. - 1.4.
I 131 – particulate 5 600 29.3. - 30.3.
I 131 - gaseous 13 000 28.3. - 29.3.
Te 132 - I 132 250 29.3. - 30.3.
Cs 134 640 29.3. - 30.3.
Cs 136 6 29.3. - 1.4.
Cs 137 720 29.3. - 30.3.
Ba 140 - La 140 2 25.3. - 29.3.Sr 90, Pu 238 a Pu 239, 240 – background levelAm 241 a Cm 242 – not found
Natural radionuclides:Be 7 : max 10 000 µBq/m3 (average - 3000 µBq/m3)Pb 210 : max 2000 µBq/m3 (average - 500 µBq/m3)
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IRPA 13 Glasgow Wednesday, May 16, 2012
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IRPA 13 Glasgow Wednesday, May 16, 2012
1986 vs. 2011 in the Czech Republic (average values)
22/3
29/3 5/
412
/419
/426
/4 3/5
10/5
17/5
24/5
31/5 7/
61E-07
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
1E+00
1E+01
2011
1986Cs 134
Date (1986/2011)
Act
ivit
y [B
q/m
3]
1E-07
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
1E+00
1E+01
2011
1986Cs 137
Date (1986/2011)
Act
ivit
y [B
q/m
3]
22/3
29/3 5/4
12/4
19/4
26/4 3/5
10/5
17/5
24/5
31/5 7/6
1E-07
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
1E+00
1E+01
1E+02
2011 particulate
1986 particulate
2011 gaseous
I 131
Date (1986/2011)
Act
ivit
y [B
q/m
3]
Nuclide
1986 2011
I 131 70 Bq/m3
0.013 Bq/m3
Cs 137 23 Bq/m3
0.00072 Bq/m3
Maximal observed values
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Wednesday, May 16, 2012IRPA 13 Glasgow
1986 vs. 2011 in the Czech Republic
1986 2011
Effective dose 0.5 mSv 3.4E-5 mSv (88% I 131)
Fallout Cs 137 5000 Bq/m2 0.5 – 3 Bq/m2
I 131 gas/total ratio
Cca 0.8 0.6 – 0.9
Cs 137/ Cs 134 1.8 1
21/3 31/3 10/4 20/4 30/40.4
0.5
0.6
0.7
0.8
0.9
1.0
Date of the year 2011 [day.month]
I 13
1 r
ati
o g
as
/to
tal
-2E-5 7E-20 2E-5 4E-5 6E-5 8E-5 1E-40E+0
2E-5
4E-5
6E-5
8E-5
1E-4
Cs137/Cs134 = 1.0
Cs 134 activity [Bq/m3]
Cs
13
7 a
cti
vit
y [
Bq
/m3
]
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IRPA 13 Glasgow
National Radiation Protection Institute
Thank you for your attention
Wednesday, May 16, 2012