Forms and compounds of radioactive iodine in emissions of the JSC Karpov Institute of Physical Chemistry

Abstract

The paper provides the results of determining forms and compounds of radioactive iodine isotopes in emissions of a controlled source during normal operation of the VVR-ts research reactor and production of radiopharmaceuticals. The determined average daily volumetric activity of four iodine isotopes ¹³¹I, ¹³²I, ¹³³I, and ¹³⁵I equals to 119, 126, 36, and 21 Bq/m³, respectively. A 97-% fraction of the first three isotopes has a gaseous form in the gas-air environment of the emission source. Weakly adsorbed compounds predominate among these gases. The isotope of ¹³⁵I was identified in a single experiment, which hampers drawing unambiguous conclusions about its forms and compounds in the emissions.