• Title, Summary, Keyword: 삼중수소

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Model for assessing the contamination of agricultural plants by accidentally released tritium (삼중수소 사고유출로 인한 농작물 오염 평가 모델)

  • Keum, Dong-Kwon;Lee, Han-Soo;Kang, Hee-Suk;Choi, Young-Ho;Lee, Chang-Woo
    • Journal of Radiation Protection and Research
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    • v.30 no.1
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    • pp.45-54
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    • 2005
  • A dynamic compartment model was developed to appraise the level of the contamination of agricultural plants by accidentally released tritium from nuclear facility. The model consists of a set of inter-connected compartments representing atmosphere, soil and plant. In the model three categories of plant are considered: leafy vegetables, grain plants and tuber plants, of which each is modeled separately to account for the different transport pathways of tritium. The predictive accuracy of the model was tested through the analysis of the tritium exposure experiments for rice-plants. The predicted TFWT(tissue free water tritium) concentration of the rice ear at harvest was greatly affected by the absolute humidity of air, the ratio of root uptake, and the rate of rainfall, while its OBT(organically bound tritium) concentration the stowing period of the ear, the absolute humidity of air and the content of hydrogen in the organic phase. There was a good agreement between the model prediction and the experimental results lot the OBT concentration of the ear.

Low level tritium analysis using liquid scintillation counter (액체섬광계수기를 이용한 저준위 트리튬 분석법연구)

  • Yoon, Yoon Yeol;Cho, Soo Young;Lee, Kil Yong;Kim, Yongje
    • Analytical Science and Technology
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    • v.20 no.5
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    • pp.419-423
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    • 2007
  • Environmental low level tritium analysis was studied using liquid scintillation counter(LSC) and electrolytic enrichment method. To obtain low level blank count, various counting vials were investigated. Among them, teflon coated PE vial had a lower blank count rate (1.86 cpm) and we obtained 2.01 Bq/L detection and tritium separation factor was above 20. LSC counting efficiency obtained $28.70{\pm}0.27%$ using the NIST tritium standard water sample.

OBT Concentrations of Marine Organisms around Wolsung Nuclear Power Plants (월성 원자력발전소 주변 해양생물중의 조직결합 삼중수소 농도)

  • Kim, Do-Sung;Park, Gyu-Jun;Lin, Xiu-Jing;Kim, Wan;Kang, Hee-Dong;Doh, Sih-Hong;Kim, Chang-Kyu
    • Journal of Radiation Protection and Research
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    • v.28 no.1
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    • pp.75-78
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    • 2003
  • The organically bound tritium(OBT) concentrations of the marine organisms(seaweed and shellfish) around Wolsung nuclear power plants were measured. The OBT concentrations of seaweeds were in the range of $0.372{\sim}2.72$ Bq/kg-fresh. The OBT concentrations of shellfish were in the range of $0.239{\sim}2.02$ Bq/kg-fresh. The internal dose due to the OBT concentration of seaweed was estimated as $3.4{\times}10^{-7}$ mSv/year.

Manufacturing Process of Self-Luminous Glass Tube (SLGT) Utilizing Tritium Gas (I) (삼중수소 활용을 위한 자발광유리관 (SLGT) 제조기술)

  • Kim Kwangsin;Kim Kyeongsook;Chung Eun-Su;Son Soon Hwan;Nam Gi-Jung
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • pp.87-95
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    • 2005
  • Laser sealing/cutting technique, one of the 4 core technologies to manufacture self-luminous glass tubes (SLGTs) has been developed. Through the analysis of commercial products it is found that Pyrex Is used for SLGTs. A CO2 laser, which is commonly used for glass work was used for the study The factors affecting the sealing/cutting were laser intensity, duration. Irradiation method, and pressure inside the tube. The whole Process is composed of 2 stages. In the first stage. both ends of the tubes are sealed while tritium is insected in the tubes. And the tritium sealed tubes are cut in the desired size in the second stage. Defocused beam was used for seal ing and focused beam was used for cutting. After the sealing/cutting, the tubes were heat treated to prevent fracture due to the residual heat stress.

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