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KMID : 0364919990240040219
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Journal of Radiation Protection and Research
1999 Volume.24 No. 4 p.219 ~ p.223
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Contamination of Chineses Cabbage with ^(85)Sr, ^(103)Ru and ^(134)Cs Related to Time of Foliar Application
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최용호/Choi, Yong-Ho
임광묵/박효국/이원윤/이창우/Lim, Kwang-Muk/Park, Hyo-Guk/Lee, Won-Yun/Lee, Chang-Woo
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Abstract
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A solution containing ^(85)Sr, ^(103)Ru and ^(134)Cs was applied to Chinese cabbage in a greenhouse via foliar spraying at 5 different times during its growth. Interception of the applied activity by plant showed no difference among radionuclides and increased with decreasing time interval between application and harvest. The maximum interception factor observed was 0.87. Percentages of the intercepted activity remaining in the whole leaves at harvest varied 16~58 % for ^(85)Sr, 15~73 % for ^(103)Ru and 33~64 % for ^(134)Cs, with application time and those for the inner leaves (without 6 outmost leaves) varied 2~35 %, 0.4~46 % and 14~40 %, respectively. It was demonstrated that rain plays an important role in weathering loss of the activity. Tying the upper end of the plant prior to the last application lowered interception and remaining activity in the inner leaves by factors of 3~4. Present results can be referred to in predicting the radionuclide concentration in Chinese cabbage and deciding counter-measures at the time of an accidental release from the nuclear installation.
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