UNITED KINGDOM DRINKING WATER REGULATION - RADIONUCLIDES
The appendix 2, table 1-1 and table 1-2 summarize the radionuclides and reference concentrations for drinking water in the United Kingdom. The tables below mention these data and the capabilities of ALS.
|
Radionuclide |
Half-life |
Reference concentrationa,b [Bq/L] |
20 % of Reference conc. |
ALS LOD [Bq/L] |
|
Carbon-14 |
5730 y |
240 |
48 |
0.5 |
|
Phosphorus-32 |
14.29 d |
57 |
11 |
1 |
|
Phosphorus-33 |
25.4 d |
571 |
114 |
10 |
|
Sulphur-35 |
87.44 d |
1054 |
211 |
10 |
|
Cobalt-60 |
5.27 y |
40 |
8 |
0.05 |
|
Strontium-90 |
29.12 y |
4.9 |
1 |
0.05 |
|
Zirconium-95 |
63.98 d |
144 |
29 |
1 |
|
Niobium-95 |
35.15 d |
236 |
47 |
1 |
|
Technetium-99 |
213000 y |
214 |
43 |
n/a |
|
Technetium-99m |
6.02 h |
6227 |
1254 |
n/a |
|
Ruthenium-106 |
368.2 d |
20 |
4 |
n/a |
|
Antimony-125 |
2.77 y |
125 |
25 |
1 |
|
Iodine-125 |
61.14 d |
9 |
1.8 |
n/a |
|
Iodine-129 |
1.57x107 y |
1 |
0.2 |
n/a |
|
Iodine-131 |
8.04 d |
6.2 |
1.2 |
0.1 |
a) Reference concentration corresponds to a dose of 0.1 mSv to an adult (based on an ingestion rate of 730 L/y).
b) Values in bold are for radionuclides included in the EC drinking water directive
c) ALS LOD - Limit of Detection reached in ALS in [Bq/L]
|
Radionuclide |
Half-life |
Reference concentrationa,b [Bq/L] |
20 % of Reference |
ALS LOD |
|
Caesium-134 |
2.062 y |
7.2 |
1.4 |
0.05 |
|
Caesium-137 |
30 y |
11 |
2.1 |
0.05 |
|
Cerium-144 |
284.3 d |
26.3 |
5.3 |
1 |
|
Lead-210 |
22.3 y |
0.2 |
0.04 |
0.02-0.03 |
|
Bismuth-210 |
5.012 d |
105 |
21 |
5 |
|
Polonium-210 |
138.38 d |
0.11 |
0.02 |
0.02-0.03 |
|
Radium-226 |
1600 y |
0.5 |
0.1 |
0.0 3 |
|
Radium-228 |
5.75 y |
0.2 |
0.04 |
0.04 |
|
Uranium-234 |
244500 y |
2.8 |
0.6 |
0.004 |
|
Uranium-238 |
4.468x109 y |
3 |
0.6 |
0.001 |
|
Thorium-228 |
1.913 y |
1.9 |
0.38 |
0.05 |
|
Thorium-230 |
7.7x104 y |
0.65 |
0.13 |
0.004 |
|
Thorium-232 |
1.405x1010 y |
0.6 |
0.12 |
0.001 |
|
Plutonium-239 |
24100 |
0.6 |
0.12 |
0.002 |
|
Plutonium-240 |
6537 y |
0.6 |
0.12 |
0.008 |
|
Americium-241 |
432.2 y |
0.7 |
0.14 |
0.1 |
a) Reference concentration corresponds to a dose of 0.1 mSv to an adult (based on an ingestion rate of 730 L/y).
b) Values in bold are for radionuclides included in the EC drinking water directive
c) ALS LOD - Limit of Detection reached in ALS in [Bq/L]
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