Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Tissue distribution, excretion and effects on genotoxicity of tritium following oral administration to rats

  • Lee, Jei Ha (Department of Radiation Biology, Environmental Radiation Research Group, Korea Atomic Energy Research Institute) ;
  • Kim, Cha Soon (Radiation Epidemiology Team, Radiation Health Institute, KHNP) ;
  • Choi, Soo Im (Department of Radiation Biology, Environmental Radiation Research Group, Korea Atomic Energy Research Institute) ;
  • Kim, Rae-Kwon (Department of Radiation Biology, Environmental Radiation Research Group, Korea Atomic Energy Research Institute) ;
  • Kim, Ji Young (Low-Dose Radiation Research Team, Radiation Health Institute, KHNP) ;
  • Nam, Seon Young (Low-Dose Radiation Research Team, Radiation Health Institute, KHNP) ;
  • Jin, Young Woo (Laboratory of Rational Exposure and Therapeutics, National Radiation Emergency Medical Center, Korea Institute of Radiological & Medical Sciences) ;
  • Kim, In Gyu (Department of Radiation Biology, Environmental Radiation Research Group, Korea Atomic Energy Research Institute)
  • Received : 2018.07.27
  • Accepted : 2018.09.21
  • Published : 2019.02.25
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Abstract

Tritium is an important nuclide that must be monitored for radiation safety management. In this study, HTO was orally administered to rats at the level of 37 kBq ($1{\mu}Ci$) or 370 kBq ($10{\mu}Ci$) to examine tissue distribution and excretion levels. After sacrifice, wet and dry tissue samples were weighed and analyzed for tissue free-water tritium (TFWT) and organically bound tritium (OBT). The mean tissue concentrations of TFWT (OBT) were 30.9 (17.8) and 4.4 (8.1) Bq/g on days 7 and 13 at the 37 kBq level and 30.8 (64.6) Bq/g on day 17 at the 370 kBq level. To assess the cytogenetic damage due to tritium exposure, a cytokinesis-blocked micronucleus (MN) assay was performed in blood samples from rats exposed to HTO for 14 and 21 days after oral administration. There was no significant difference in the MN frequencies between the control and exposed rats.

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