[en]Chernobyl accident took place on April 26 1986, which was the beginning of the grazing season, when there was not enough fodder on the farms and the cattle was grazed on the open territory. Therefore grazing animal-breeding was the most radioactively affected branch. The consumption of contaminated fodder and surface contamination with radioactive precipitation caused the accumulation of considerable ingested doses in the organisms of animals (up to 1 GY). Radioactive damage caused to the thyroid by the selective accumulation of radioiodine (mainly 131I) is of particular attention. Cumulative doses of thyroid irradiation in mammals were much higher than for the other organs. Thus, in cows during their grazing on the contaminated pastures outside 30-km zone the ratio of ingested doses of the thyroid and whole body was 130:1 and more, therefore, radiation effects could have a certain negative effect, concerning the agricultural animals in the zone of accidental release influence. Accumulated ingested doses in the thyroid of cows on the contaminated territory in a number of cases caused the complete destruction of the thyroid (doses above 600 Gy), which provided the loss of milk productivity and reproductive qualities of the animals. Lower doses caused the functional disturbances, which in most cases have been levelled during the years after the accident
Primary SubjectRADIATION, THERMAL, AND OTHER ENVIRONMENTAL POLLUTANT EFFECTS ON LIVING ORGANISMS AND BIOLOGICAL MATERIALS (C2120)
Secondary SubjectSPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS (C5221)
Source/ReportEuropean Commission (CEC), Brussels (Belgium); International Atomic Energy Agency, Vienna (Austria); World Health Organization, Geneva (Switzerland); 699 p; ISSN 1011-4289; ; Sep 1997; p. 465-468; International conference on one decade after Chernobyl: Summing up the consequences of the accident; Vienna (Austria); 8-12 Apr 1996; 2 refs, 5 tabs.
Country/OrganizationInternational Atomic Energy Agency (IAEA)
Descriptors (DEI)AGRICULTURE, BIOLOGICAL LOCALIZATION, CHERNOBYLSK-4 REACTOR, CONTAMINATION, DOMESTIC ANIMALS, GOITER, GRAZING, IODINE 131, MILK, PRODUCTIVITY, RADIATION DOSES, RADIOACTIVITY, RADIONUCLIDE KINETICS, REACTOR ACCIDENTS, REPRODUCTION
Descriptors (DEC)ACCIDENTS, ANIMALS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BIOLOGICAL MATERIALS, BODY FLUIDS, DAYS LIVING RADIOISOTOPES, DISEASES, ENDOCRINE DISEASES, ENRICHED URANIUM REACTORS, FEEDING, FOOD, GRAPHITE MODERATED REACTORS, INTERMEDIATE MASS NUCLEI, IODINE ISOTOPES, ISOTOPES, KINETICS, LWGR TYPE REACTORS, MATERIALS, NUCLEI, ODD-EVEN NUCLEI, POWER REACTORS, RADIOISOTOPES, REACTORS, THERMAL REACTORS, WATER COOLED REACTORS