Derivation of dose conversion factors for tritium
For a given intake mode (ingestion, inhalation, absorption through the skin), a dose conversion factor (DCF) is the committed dose equivalent to a specified organ of an individual per unit intake of a radionuclide. One also may consider the effective dose commitment per unit intake, which is a weighted average of organ-specific DCFs, with weights proportional to risks associated with stochastic radiation-induced fatal health effects, as defined by Publication 26 of the International Commission on Radiological Protection (ICRP). This report derives and tabulates organ-specific dose conversion factors and the effective dose commitment per unit intake of tritium. These factors are based on a steady-state model of hydrogen in the tissues of ICRP's Reference Man (ICRP Publication 23) and equilibrium of specific activities between body water and other tissues. The results differ by 27 to 33% from the estimate on which ICRP Publication 30 recommendations are based. The report also examines a dynamic model of tritium retention in body water, mineral bone, and two compartments representing organically-bound hydrogen. This model is compared with data from human subjects who were observed for extended periods. The manner of combining the dose conversion factors with measured or model-predicted levels of contamination in man's exposure media (air, drinking water, soil moisture) to estimate dose rate to an individual is briefly discussed.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5337327
- Report Number(s):
- NUREG/CR-2523; ORNL-5853; ON: DE82009404; TRN: 82-011886
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
61 RADIATION PROTECTION AND DOSIMETRY
MAN
DOSE COMMITMENTS
RADIONUCLIDE KINETICS
MATHEMATICAL MODELS
TRITIUM
RETENTION
BODY FLUIDS
BONE MARROW
ENVIRONMENTAL EXPOSURE PATHWAY
INGESTION
INHALATION
INTESTINES
KIDNEYS
LIVER
LUNGS
MAMMARY GLANDS
PANCREAS
RISK ASSESSMENT
SKELETON
SKIN ABSORPTION
STOMACH
TESTES
THYROID
ABSORPTION
ANIMAL TISSUES
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BODY
DIGESTIVE SYSTEM
ENDOCRINE GLANDS
GASTROINTESTINAL TRACT
GLANDS
GONADS
HEMATOPOIETIC SYSTEM
HYDROGEN ISOTOPES
INTAKE
ISOTOPES
LIGHT NUCLEI
MALE GENITALS
MAMMALS
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PRIMATES
RADIOISOTOPES
RESPIRATORY SYSTEM
TISSUES
UPTAKE
VERTEBRATES
YEARS LIVING RADIOISOTOPES
560171* - Radiation Effects- Nuclide Kinetics & Toxicology- Man- (-1987)
560161 - Radionuclide Effects
Kinetics
& Toxicology- Man
655003 - Medical Physics- Dosimetry