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The Private Water Supplies (Wales) Regulations 2010 (revoked)

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Changes over time for: Paragraph 13

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Version Superseded: 20/11/2017

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Point in time view as at 14/04/2016. This version of this provision has been superseded. Help about Status

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[F1Calculation of the indicative doseE+W

13.  Where the following formula is satisfied, it can be assumed that the indicative dose is less than the parametric value of 0,1 mSv and no further investigation is required–

where:

  • Ci(obs) = observed concentration of radionuclide i

  • Ci(der) = derived concentration of radionuclide i

  • n = number of radionuclides detected.

Derived concentrations for radioactivity in water intended for human consumption
(1)

This table includes values for the most common natural and artificial radionuclides; these are precise values, calculated for a dose of 0,1 mSv, an annual intake of 730 litre and using the dose coefficients laid down in Annex III, Table A of Directive 96/29/ Euratom; derived concentrations for other radionuclides can be calculated on the same basis, and values can be updated on the basis of more recent information recognised by the Welsh Ministers.

(2)

This table allows only for the radiological properties of uranium, not for its chemical toxicity.]

OriginNuclideDerived concentration
NaturalU-2383,0 Bq/1
U-2342,8 Bq/1
Ra-2260,5 Bq/1
Ra-2280,2 Bq/1
Pb-2100,2 Bq/1
Po-2100,1 Bq/1
ArtificialC-14240 Bq/1
Sr-904,9 Bq/1
Pu-239/Pu-2400,6 Bq/1
Am-2410,7 Bq/1
Co-6040 Bq/1
Cs-1347,2 Bq/1
Cs-13711 Bq/1
1-1316,2 Bq/1

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