METHOD OF DETERMINING SPECIFIC ACTIVITY OF RADIONUCLIDES IN LOW-ACTIVITY AND WASTE MINERALISED WATER Russian patent published in 2012 - IPC G21F9/12 

FIELD: chemistry.

SUBSTANCE: method of determining specific activity of radionuclides in low-activity and waste mineralised water involves filtration thereof through a sorbent layer containing a heavy metal ferrocyanide, a heavy metal sulphide and a strontium sorbent with extraction of radionuclides thereon and subsequent spectrometric analysis of said radionuclides. An anion-exchange resin is also added to the sorbent containing a heavy metal ferrocyanide and a heavy metal sulphide. The sulphate obtained after passing water through the three-component sorbent is further filtered through a strontium sorbent layer which is in form of a cation-exchange resin. Gamma-spectrometric determination of specific activity of radionuclides sorbed on the three-component sorbent is carried out. Determination of the specific activity of radionuclides sorbed on the cation-exchange resin is carried out via radiometric measurement of their total β-activity in an eluate.

EFFECT: high accuracy of determining specific activity of γ-emitting radionuclides and easy determination of specific activity of γ- and β-emitting radionuclides in low-activity and waste mineralised water.

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