relevant radionuclides for the calculation of the … · 2010. 10. 7. · claudia landstetter,...

Österreichische Agentur für Gesundheit und Ernährungssicherheit GmbHwww.ages.at

RELEVANT RADIONUCLIDES FOR THE CALCULATION OF THE TOTAL DOSE IN

AUSTRIAN DRINKING WATER

Mag. Claudia LandstetterCC Radiation Protection and Radiochemistry

LSC 2010Paris, 5.9.2010 – 10.9.2010

www.ages.at 2Claudia Landstetter, 7.9.2010

•Ground- and drinking water project is funded by

•Federal Ministry of Health•Federal Ministry of Agriculture, Forestry, Environment and Water Management


Aim of the Project

• overview of the distribution of natural radionuclide activity concentration levels in ground water bodies

• identify regions with high activity concentrations • identify regions with activity concentrations

below the lower limit of detection• data can be used for risk assessment within

drinking water analyses


Drinking water analyses

• detect natural radionuclides with dose relevant concentrations

• concentrate on regions with high activity concentrations

• establish a risk based monitoring program

- area-wide monitoring every year- measured in a 5 to 10 year period


• 2500 measuring points all over austria for themonitoring of gound water bodies

• 463 measuring points• ground water used for drinking water abstraction

and not used for drinking water abstraction


1275

25

43

147

78

4141

Upper Austria

Burgenland

Lower Austria

StyriaSalzburg

Carinthia

Tyrol

Vorarlberg


226RaLSC

210Pb, 210Po, 228Ra, 226Ra

LSC

3HLSC

238UICP-MS

222RnLSC

2 L of water sample


Sampling

• 2 bottles• 1 acidified with 8 ml HNO3 shortly after the

sample was filled into the bottle• 1 for 222Rn filled carefully and caped

immediately


3H determination via LSC

- 10 ml water sample- 10 ml Quicksafe 400™- measured with a Quantulus 1220™


238U determination by ICP-MS

- direct introduction of the acidified samples- no chemical pre-treatment- Rhodium used as internal standard


222Rn determination via LSC

- gastight bottle with appropriate size- 10 ml of the water + 10 ml of Perkin Elmer high efficiency

mineral oil scintillator™- 222Rn in equilibrium with 218Po and 214Po


226Ra determination via LSC

- 10 ml of the water + 10 ml of Perkin Elmer high efficiency mineral oil scintillator™

- 226Ra measured after in equilibrium with 222Rn- 222Rn in equilibrium with 218Po and 214Po


228Ra, 226Ra, 210Pb, 210Po determinationby LSC

1 L of water sample + Pb- carrier + Ba-carrier

precipitation with 1 M Na2S at pH 1.5

filtrate for 228Ra determination fumed off with HNO3 and HCl

coprecipitated with 1 M H2SO4 and BaCl2 solution at pH 2-3

dissolved in 0,25 M EDTA

after adding Hisafe 3 measured by LSC with alpha beta separation

precipitate fumed off with HNO3 und HCl

dissolved in 1M HCl und 7,5 M H3PO4

210Bi and 210Po selectively extracted with Polex™

measured by LSC with alpha beta separation


222Rn Activity Concentration in Austrian Ground Water

0

20

40

60

80

100

120

140

160

< LLD 0,25 - 10 10 - 20 20 - 30 30 - 60 60 - 100 100 - 200 200 - 300 300 - 400 > 400

Bq/L

Num

ber o

f Sam

ples


3H Activity Concentration in Austrian Ground Water

0

50

100

150

200

250

300

< LLD 1,28 - 1,75 1,75 - 2,25 2,25 - 2,75 2,75 - 3

Bq/L

Num

ber o

f Sam

ples


238U Concentration in Austrian Ground Water

0

50

100

150

200

250

300

< LLD 0,05 - 1 1 - 2 2 - 3 3 - 5 5 - 10 10 - 15 15 - 20 > 20

µg/L

Num

ber o

f Sam

ples


226Ra Activity Concentration in Austrian Ground Water

0

10

20

30

40

50

60

70

80

90

< LLD 1 - 5 5 - 10 10 - 15 15 - 20 20 - 30 30 - 60 > 60

mBq/L

Num

ber o

f Sam

ples


228Ra Activity Concentration in Austrian Ground Water

0

20

40

60

80

100

120

140

160

180

< LLD 7 - 15 15 - 25 25 - 40 > 40

mBq/L

Num

ber o

f Sam

ples


210Pb Activity Concentration in Austrian Ground Water

0

20

40

60

80

100

120

140

160

< LLD 4 - 10 10 - 20 20 - 30 > 30

mBq/L

Num

ber o

f Sam

ples


210Po Activity Concentration in Austrian Ground Water

0

20

40

60

80

100

120

140

160

< LLD 2 - 10 10 - 20 20 - 30 > 30

mBq/L

Num

ber

of S

ampl

es


• Council Directive 98/83/EC (1998) on the quality of water intended for human consumption

• Drinking water ordinance BGBl. II Nr. 304/2001• indicator parametric value:

- Tritium 100 Bq/L - Total Indicative Dose (TID) 0.1 mSv/a


• Codex Alimentarius Austriacus section B1 • Total dose can be determined by Austrian Standard for

determination and evaluation of the total dose due to radionuclides in drinking water (OE-NORM, ON-S 5251, 2005)

• Total dose: - 226Ra and 228Ra are taken into account - 238U, 234U minor contribution to the effective dose 232Th and 234Th with

low solubility in water- Artificial radionuclides and other natural radionuclides (with the

exception of Tritium, 40K, 222Rn and its progenies) are taken into account if dose-relevant concentrations can be suspected


Total Dose (ÖNORM ON-S5251)

0

20

40

60

80

100

120

140

160

180

< 0,005 0,005 - 0,01 0,01 - 0,02 0,02 - 0,03 0,03 - 0,05 0,05 - 0,1 > 0,1

mSv/a

Num

ber o

f Sam

ples


Total Dose (including 210Pb, 210Po)

0

20

40

60

80

100

120

140

160

180

< 0,005 0,005 - 0,01 0,01 - 0,02 0,02 - 0,03 0,03 - 0,05 0,05 - 0,1 > 0,1

mSv/a

Num

ber o

f Sam

ples


Vorarlberg

TyrolSalzburg Styria

Lower AustriaUpper Austria

Burgenland

Carinthia

222Rn > 100 Bq/L238U > 10 µg/L

Ground Water


Vorarlberg



Burgenland

Carinthia

226Ra > 30 mBq/L228Ra > 25 mBq/L

Ground Water


Vorarlberg



Burgenland

Carinthia

210Pb > 25 mBq/L210Po > 20 mBq/L

Ground Water


Conclusion

• regions with higher activity concentrations weredefined

• Just one sample was measured for which the total dose exceeds the total indicative dose of 0.1 mSv/a. But this ground water is not used for drinking water abstraction.

• Fundamental data was obtained to es tablish a more risk based monitoring program for further drinking water analyses

relevant radionuclides for the calculation of the … · 2010. 10. 7. · claudia landstetter,...

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