INREM II: a computer implementation of recent models for estimating the dose equivalent to organs of man from an inhaled or ingested radionuclide

Technical Report · Thu Feb 02 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6787367· OSTI ID:6787367

Killough, G. G.; Dunning, Jr., D. E.; Pleasant, J. C.

This report describes a computer code, INREM II, which calculates the internal radiation dose equivalent to organs of man which results from the intake of a radionuclide by inhalation or ingestion. Deposition and removal of radioactivity from the respiratory tract is represented by the ICRP Task Group Lung Model. A four-segment catenary model of the GI tract is used to estimate movement of radioactive material that is ingested or swallowed after being cleared from the respiratory tract. Retention of radioactivity in other organs is specified by linear combinations of decaying exponential functions. The formation and decay of radioactive daughters is treated explicitly, with each radionuclide species in the chain having its own uptake and retention parameters, as supplied by the user. The dose equivalent to a target organ is computed as the sum of contributions from each source organ in which radioactivity is assumed to be situated. This calculation utilizes a matrix of S-factors (rem/..mu..Ci-day) supplied by the user for the particular choice of source and target organs. Output permits the evaluation of crossfire components of dose when penetrating radiations are present. INREM II is coded in FORTRAN IV and has been compiled and executed on an IBM-360 computer.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6787367
• Report Number(s): ORNL/NUREG/TM-84
• Country of Publication: United States
• Language: English

Related Subjects

560161* -- Radionuclide Effects
Kinetics
& Toxicology-- Man
560171 -- Radiation Effects-- Nuclide Kinetics & Toxicology-- Man-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BODY
COMPUTER CALCULATIONS
COMPUTER CODES
DIGESTIVE SYSTEM
DISTRIBUTION
DOSES
GASTROINTESTINAL TRACT
I CODES
INGESTION
INHALATION
INTAKE
ISOTOPES
LUNGS
MAMMALS
MAN
MATHEMATICAL MODELS
ORGANS
PRIMATES
RADIATION DOSES
RADIOISOTOPES
RADIONUCLIDE KINETICS
RESPIRATORY SYSTEM
RETENTION FUNCTIONS
TISSUE DISTRIBUTION
VERTEBRATES