Derivation of dose conversion factors for tritium

Technical Report · Mon Mar 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/5337327· OSTI ID:5337327

Killough, G. G.

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., TN (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5337327
• Report Number(s): NUREG/CR-2523; ORNL-5853; ON: DE82009404
• Country of Publication: United States
• Language: English

Related Subjects

560161 -- Radionuclide Effects
Kinetics
& Toxicology-- Man
560171* -- Radiation Effects-- Nuclide Kinetics & Toxicology-- Man-- (-1987)
61 RADIATION PROTECTION AND DOSIMETRY
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
655003 -- Medical Physics-- Dosimetry
ABSORPTION
ANIMAL TISSUES
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BODY
BODY FLUIDS
BONE MARROW
DIGESTIVE SYSTEM
DOSE COMMITMENTS
ENDOCRINE GLANDS
ENVIRONMENTAL EXPOSURE PATHWAY
GASTROINTESTINAL TRACT
GLANDS
GONADS
HEMATOPOIETIC SYSTEM
HYDROGEN ISOTOPES
INGESTION
INHALATION
INTAKE
INTESTINES
ISOTOPES
KIDNEYS
LIGHT NUCLEI
LIVER
LUNGS
MALE GENITALS
MAMMALS
MAMMARY GLANDS
MAN
MATERIALS
MATHEMATICAL MODELS
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PANCREAS
PRIMATES
RADIOISOTOPES
RADIONUCLIDE KINETICS
RESPIRATORY SYSTEM
RETENTION
RISK ASSESSMENT
SKELETON
SKIN ABSORPTION
STOMACH
TESTES
THYROID
TISSUES
TRITIUM
UPTAKE
VERTEBRATES
YEARS LIVING RADIOISOTOPES