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한진석,김병곤,김신도,Han, Jin-Seok,Kim, Byung-Gon,Kim, Shin-Do 한국환경영향평가학회 1996 환경영향평가 Vol.5 No.1
The variations of ozone concentration and the sensitivity test for VOC emission intensities was investigated by means of a PBM(Photochemical Box Model). Compared to monitoring data, the typical variations of $NO_2$, CO, $O_3$ for days were successfully reproduced. Model results revealed that maximum ozone concentration got increased with the increase of VOC emission, that is, VOC played the important role in producing the photochemical smog.
한진석,장준경,이현철,Han, Jinseok,Jang, Junkyung,Lee, Hyun Chul 한국방사성폐기물학회 2020 방사성폐기물학회지 Vol.18 No.1
The Graphite Isotope Ratio Method (GIRM) can verify non-proliferation of nuclear weapon by estimating the total plutonium production in a graphite-moderated reactor. Using the reactor, plutonium is generated and accumulated through the <sup>238</sup>U neutron capture reaction, and impurities in the graphite are converted to nuclides due to the nuclear reaction. Therefore, the amount of plutonium production and concentration of the impurities are correlated. However, the plutonium production cannot be predicted using only the absolute concentration of the impurities. It can only be predicted when the initial concentration of the impurities is obtained because the concentration, at a certain time, depends on it. Nevertheless, the ratios of the isotopes in an element are known regardless of the impurity of an element in the graphite moderator. Thus, the correlation between the isotope ratio and amount of plutonium produced helps predict plutonium production in a graphite-moderated reactor. Boron, Lithium, Chlorine, Titanium, and Uranium are known as indicator elements in the GIRM. To assess whether the correlation between the indicator isotope and amount of plutonium produced is independent of the initial concentration of the impurities, four different impurity compositions of graphite were used. <sup>10</sup>B/<sup>11</sup>B, <sup>36</sup>Cl/<sup>35</sup>Cl, <sup>48</sup>Ti/<sup>49</sup>Ti, and <sup>235</sup>U/<sup>238</sup>U had a consistent correlation with the cumulative plutonium production, regardless of the initial impurity concentration of the graphite, because these isotopes were not generated through the nuclear reaction of other elements. On the other hand, the correlation between <sup>6</sup>Li/<sup>7</sup>Li and plutonium production depended on the initial concentration of the impurities in graphite. Although <sup>7</sup>Li can be produced through the neutron capture reaction of <sup>6</sup>Li, the (n, α) reaction of <sup>10</sup>B was the major source of <sup>7</sup>Li. Therefore, the initial concentration of <sup>10</sup>B affected the production of <sup>7</sup>Li, making Li unsuitable as an indicator element for the GIRM.
암모니아, 트리메틸아민, 스타일렌의 악취강도와 희석배수의 상관관계 연구
한진석(Jin-Seok Han),박상진(Sang-Jin Park) 한국냄새환경학회 2010 실내환경 및 냄새 학회지 Vol.9 No.4
본 연구에서는 현재 악취공정시험방법에서 제시하고 있는 공기희석관능법에 의한 희석배수와 악취강도와의 관계를 살펴보기 위하여 암모니아, 트리메틸아민, 스타일렌에 대한 악취강도와 희석배수를 측정하였다. 암모니아, 트리메틸아민, 스타일렌의 물질농도에 따른 악취강도와 희석배수 측정을 위하여 악취공정시험방법에서 제시하는 판정인 선정실험을 통해 13명의 악취판정인을 선발하였고, 선발된 판정인에 의해 감지된 암모니아, 트리메틸아민, 스타일렌 물질별 악취강도와 희석배수를 산정하였다. 판정인에 의해 측정된 암모니아, 트리메틸아민, 스타일렌의 악취강도와 희석배수의 상관관계는 I=A · Log D + 0.5에 의해 적합하게 표현되는 것으로 나타났다. 본 연구결과는 현재 적용되고 있는 부지경계선에서의 복합악취 농도 규제기준에 대한 개선방안 및 지정악취물질들의 악취강도와 물질농도, 희석배수간의 관계 및 특성연구 등의 기초자료로 사용할 수 있을 것으로 판단된다. This study aims to understand the correlation between odor intensity and dilution factor using the Air Dilution Olfactory Method, which is suggested in the Standard method of Odor Compounds, by measuring odor intensity and dilution factor for NH₃, TMA and styrene. For the measurement, 13 panel members were selected through a panel test, and odor intensity and dilution factor by substance produced from the selected panel were estimated. The estimation showed that the correlation of odor intensity with dilution factor for NH₃, TMA and styrene can be reasonably expressed by the equation [I=A · Log D +0.5]. The result of this study is suggested to be used as a base data for research on measures to improve the regulation standards for complex odor concentration at a boundary site in operation, as well as a correlation between odor intensity, concentration and dilution factor for the designated odor substances, and their characteristics.
한진석 ( Jin-seok Han ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-
본 연구에서는 요즘 이슈가 되고 있는 미세먼지, 그 중에서도 PM2.5에 대해 알아보고자 하였다. PM2.5의 농도현황과 배출원, 구성성분, 생성기작 등의 물리적인 특징과 화학적 특징에 대해 알아 보고, PM2.5가 인체에 미치는 영향, PM2.5의 현황에 대해 알아보고자 하였다. 미세먼지는 1차 입자상물질(Primary Aerosol)과, 2차 생성 입자상 물질 (Sencondary Aerosol)로 분류할 수 있다. 2차 생성 입자상 물질은 대기중으로 배출된 SO<sub>2</sub>, NOx, VOCs와 같은 기체상 물질이 광화학반응과 같은 균질반응(Homogeneous Reaction)과 비균질반응(Heterogeneous Reaction)에 의하여 입자상으로 생성, 변화되어진 것이다. PM2.5 고농도 발생 시에는 일반적으로 1차 입자상 물질보다는 2차 생성 입자상물질의 기여율이 증가하는 특성을 나타낸다. 대기 중 PM2.5농도를 개선, 관리하기 위해서는 1차 입자상 물질의 발생원, 2차 생성 입자상 물질의 전구물질인 SO<sub>2</sub>, NOx, VOCs에 대한 관리와 함께 대기 중 생성, 반응 기작의 이해를 바탕으로 개선 전략을 추진해야 할 것이다. In this study, We wanted know about PM2.5 of fine particle, and about physical, chemical characteristic such as concentration, configuration constituent and emission source. The fine particle can be classified into primary aerosol and secondary aerosol. The secondary aerosol were generated by heterogeneous, homogeneous reaction of gaseous materials such as SO<sub>2</sub>, NOx, VOCs. When PM2.5 is generated at a high concentration, the contribution ratio of secondary aerosol increase rather than the primary aerosol. To improve and manage the concentration of PM2.5 in ambient air, it is necessary to manage for the emission source of primary aerosol, secondary aerosol(SO<sub>2</sub>, NOx, VOCs), and development strategies base on understanding of generation in ambient air and reaction mechanism.