Wednesday, May 16, 2012IRPA 13 Glasgow Monitoring of Radionuclides in the Air in the Czech Republic...
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Wednesday, May 16, 2012 IRPA 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
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Transcript of Wednesday, May 16, 2012IRPA 13 Glasgow Monitoring of Radionuclides in the Air in the Czech Republic...
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
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
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
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
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
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)
IRPA 13 Glasgow Wednesday, May 16, 2012
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
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
]
IRPA 13 Glasgow
National Radiation Protection Institute
Thank you for your attention
Wednesday, May 16, 2012
