굴의 해수에서의 인공방사능 핵종의 흡수와 잔류

Title
굴의 해수에서의 인공방사능 핵종의 흡수와 잔류
Alternative Title
Uptake and retention of artificial radionuclides from seawater in the oyster Crassostrea Gigas
Author(s)
홍기훈; 김석현; 이현미; 오승용
KIOST Author(s)
Kim, Suk Hyun(김석현)Lee, Hyunmi(이현미)Oh, Sung Yong(오승용)
Publication Year
2014-05-09
Abstract
The uptake and loss of radionuclides in the oyster (Crassostrea Gigas) commonly cultivated in Korean waters were studied under the laboratory conditions using radiotracer techniques to develop countermeasures against radiological emergencies, e.g. intrusion of elevated artificial radionuclides laden seawater from the offshore or atmosphere into the oyster rearing waters from the accidents occurred in the adjacent nuclear installations, such as Fukushima nuclear reactor accidents in 2011. 241Am, 109Cd, 57Co, 60Co, 123mTe, 51Cr, 113Sn, 85Sr, 137Cs and 88Y radionuclides were selected and their concentration were arbitrary chosen to yield 137Cs to be about 10.0 Bq kg-1 sufficiently high to resulting a fish meat exceeding Korean regulatory limit if we assume concentration factor for fish is 100. Three oysters were placed in each seawater tank at 12±1°C. Uptake rates in oyster’s tissue were determined at the fixed time intervals to 8 days and excretion rates were also determined at the fixed time intervals up to 12 days by placing radiolabeled oysters in the radionuclides free seawater tanks. Three uptake patterns were emerged: (1) initial exponential uptake and reached asymptotic concentration for 137Cs and 85Sr within several days, (2) continued linear uptake for 109Cd and 99Y, (3) initial rapid uptake with subsequent decrease in other radionculdies. All radionuclides except 85Sr and 109Cd in oyster’s tissue were decs, e.g. intrusion of elevated artificial radionuclides laden seawater from the offshore or atmosphere into the oyster rearing waters from the accidents occurred in the adjacent nuclear installations, such as Fukushima nuclear reactor accidents in 2011. 241Am, 109Cd, 57Co, 60Co, 123mTe, 51Cr, 113Sn, 85Sr, 137Cs and 88Y radionuclides were selected and their concentration were arbitrary chosen to yield 137Cs to be about 10.0 Bq kg-1 sufficiently high to resulting a fish meat exceeding Korean regulatory limit if we assume concentration factor for fish is 100. Three oysters were placed in each seawater tank at 12±1°C. Uptake rates in oyster’s tissue were determined at the fixed time intervals to 8 days and excretion rates were also determined at the fixed time intervals up to 12 days by placing radiolabeled oysters in the radionuclides free seawater tanks. Three uptake patterns were emerged: (1) initial exponential uptake and reached asymptotic concentration for 137Cs and 85Sr within several days, (2) continued linear uptake for 109Cd and 99Y, (3) initial rapid uptake with subsequent decrease in other radionculdies. All radionuclides except 85Sr and 109Cd in oyster’s tissue were dec
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26282
Bibliographic Citation
3rd China-Korea workshop on oceanic monitoring and development of prediction system of radionuclides for nuclear safety, pp.7, 2014
Publisher
The
Type
Conference
Language
English
Publisher
The
Related Researcher
Research Interests

Fish aquaculture,Aquacultural engineering,Environmental physiology,어류 양식,양식 공학,환경생리학

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