Modelling approaches for estimating derived intervention levels in foods

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5750745

Hoffman, F O

This paper presents an overview of the procedures and steps required when using mathematical models to simulate environmental systems to establish derived intervention levels (DILs) in foods. After determining an acceptable level of risk, the most important model parameters for calculating DILs are risk conversion factors, dose conversion factors for a unit ingestion of a given radionuclide, consumption rates of different food types, and the ratio of the peak activity in food to the time-integrated concentration in food (annual or lifetime). Terrestrial and aquatic foodchain transport models are only needed to establish secondary DILs for the deposition on land or the concentration of a radionuclide in animal feed and fodder. The derivation of the Protective Action Guides (PAGs) is reviewed, and values are given for both emergency and preventive PAGs for I-131, Sr-89, Sr-90, Cs-134, and Cs-137. Explicit estimates of uncertainty are also recommended as attempts are made to produce model predictions that are realistic rather than conservatively biased. Examples from an international model validation exercise (BIOMOVS) that is using data from the Chernobyl accident are also provided. 10 refs., 3 figs., 4 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5750745
• Report Number(s): CONF-8703207-1; ON: DE87013881
• Resource Relation: Conference: Scientific seminar on foodstuff intervention levels following a nuclear accident, Luxembourg, Luxembourg, 27 Mar 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CONTAMINATION
INGESTION
RISK ASSESSMENT
MATHEMATICAL MODELS
CHERNOBYLSK-3 REACTOR
DOSE EQUIVALENTS
DOSE LIMITS
ENVIRONMENTAL EXPOSURE PATHWAY
FOOD
IODINE 131
MILK
PERSONNEL DOSIMETRY
RADIOACTIVITY
REVIEWS
SOCIO-ECONOMIC FACTORS
US FDA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BODY FLUIDS
DAYS LIVING RADIOISOTOPES
DOCUMENT TYPES
DOSIMETRY
ENRICHED URANIUM REACTORS
GRAPHITE MODERATED REACTORS
INSTITUTIONAL FACTORS
INTAKE
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPES
LWGR TYPE REACTORS
MATERIALS
NATIONAL ORGANIZATIONS
NUCLEI
ODD-EVEN NUCLEI
POWER REACTORS
RADIOISOTOPES
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SAFETY STANDARDS
STANDARDS
THERMAL REACTORS
US HEW
US ORGANIZATIONS
WATER COOLED REACTORS
560161* - Radionuclide Effects
Kinetics
& Toxicology- Man