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KMID : 0364919980230040219
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Journal of Radiation Protection and Research
1998 Volume.23 No. 4 p.219 ~ p.227
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Contamination of Chinese 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 SSSr, 103Ru and 134CS 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 1658 % for 35Sr, 1573 % for 1 Ru and 33--64 % for 134 Cs, with application time and those for the inner leaves (without 6 outmost leaves) varied 235 %, 0.446 % and 1440 %, 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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KEYWORD
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