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Title: CHRONIC IRRADIATION OF SCOTS PINE TREES (PINUS SYLVESTRIS) IN THE CHERNOBYL EXCLUSION ZONE: DOSIMETRY AND RADIOBIOLOGICAL EFFECTS

To identify effects of chronic internal and external radiation exposure for components of terrestrial ecosystems, a comprehensive study of Scots pine trees in the Chernobyl Exclusion Zone was performed. The experimental plan included over 1,100 young trees (up to 20 years old) selected from areas with varying levels of radioactive contamination. These pine trees were planted after the 1986 Chernobyl Nuclear Power Plant accident mainly to prevent radionuclide resuspension and soil erosion. For each tree, the major morphological parameters and radioactive contamination values were identified. Cytological analyses were performed for selected trees representing all dose rate ranges. A specially developed dosimetric model capable of taking into account radiation from the incorporated radionuclides in the trees was developed for the apical meristem. The calculated dose rates for the trees in the study varied within three orders of magnitude, from close to background values in the control area (about 5 mGy y{sup -1}) to approximately 7 Gy y{sup -1} in the Red Forest area located in the immediate vicinity of the Chernobyl Nuclear Power Plant site. Dose rate/effect relationships for morphological changes and cytogenetic defects were identified and correlations for radiation effects occurring on the morphological and cellular level were established.
Authors:
;
Publication Date:
OSTI Identifier:
1024193
Report Number(s):
SRNL-STI-2011-00534
Journal ID: ISSN 0017-9078; HLTPAO; TRN: US1104673
DOE Contract Number:
DE-AC09-08SR22470
Resource Type:
Journal Article
Resource Relation:
Journal Name: HEALTH PHYSICS JOURNAL
Research Org:
SRS
Sponsoring Org:
DOE
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; ACCIDENTS; BIOLOGICAL RADIATION EFFECTS; CHRONIC IRRADIATION; CONTAMINATION; DEFECTS; DOSE RATES; DOSIMETRY; FORESTS; MORPHOLOGICAL CHANGES; NUCLEAR POWER PLANTS; PARTICLE RESUSPENSION; PINES; RADIATION EFFECTS; RADIATIONS; RADIOISOTOPES; SOILS; TERRESTRIAL ECOSYSTEMS; TREES