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RISS 인기검색어
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- 저자 : 류태권(Taekwon Ryu) (검색결과 4 건)
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Ivermectin, praziquantel, tamiflu, triclosan의 환경위해성평가
류태권(Taekwon Ryu),김정곤(Jungkon Kim),김경태(Kyungtae Kim),이재우(Jaewoo Lee),김지은(Jieun Kim),조재구(Jaegu Cho),윤준헌(Junheon Yoon),이재안(Jaean Lee),김필제(Pilje Kim),류지성(Jisung Ryu) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.2
Objectives: The purpose of this study was to assess environmental risk on the emerging contaminants of concern, such as ivermetin, parziquantel, tamiflu and triclosan. Furthermore, we tried to provide a more efficient management practice and a basis for future studies of risk assessment on those substances. Methods: Predicted no effect concentration (PNEC) and predicted environmental concentration (PEC) were determined through modeling and literature reviews. Environmental risk assessment was evaluated by calculating HQ (hazard quotient) by a comparison of PEC (or measured environmental concentration (MEC)) and PNEC. Results: HQ value of tamiflu calculated from MEC was 1.9E-03. For ivermectin and triclosan, the HQ values were not available because these were not detected in the aquatic environment. The toxicity of ivermectin and triclosan showed a very low value, indicating a high level of HQ. However, praziquantel can be categorized into the material that do not require management since they have less than HQ 1. Conclusion: Based on the results of the initial risk assessment, it is assumed that the ivermectin and triclosan have potential to cause direct adverse effects on the aquatic environment. To conduct an accurate environmental risk assessment, the further study on PEC estimation of such contaminants should be actively carried out.
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화학사고 장외영향평가 지원 프로그램(KORA)의 활용도 증대를 위한 제언
김정곤(Jungkon Kim),류지성(Jisung Ryu),류태권(Taekwon Ryu),곽솔림(Sollim Kwak),임형준(Hyeongjun Lim),최우수(Woosoo Choi),정진희(Jinhee Jung),이지은(Jieun Lee),임동연(Dongyeon Lim),윤준헌(Junheon Yoon) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.2
Objectives: All enterprises intending to install and operate hazardous chemical handling facilities should prepare an off-site risk assessment (ORA) report that evaluates the impact of potential chemical accidents on the surrounding environment and population. This study was conducted to introduce the process of development and the functioning of the Korea Off-site Risk Assessment support tool (KORA) developed by the National Institute of Chemical Safety and to suggest manners to increase its utilization. Additionally, this article provided an overview of KORA. Methods: In order to identify problems with and refinements for KORA, the required items for each phase of KORA were derived by analyzing the Chemical Control Act and related administrative regulations. Results: The functions of KORA made receptor-considered assessment of chemical accidents possible, but several limitations were found in particular phases, such as the analysis of impact range, consideration of sensitive receptors, and assessment of environmental receptors. Conclusion: In this study, we suggested manners to increase the utilization of KORA. It is anticipated that the further research suggested in the study could contribute to the stabilization of the KORA system.
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병렬 시스템 적용에 따른 장외영향평가 위험도 산정 방법 개선
김민수(Min-Su Kim),이은별(Eun-Byeol Lee),류태권(Taekwon Ryu),김재영(Jae-Young Kim),윤준헌(Junheon Yoon) 대한환경공학회 2018 대한환경공학회지 Vol.40 No.4
장외영향평가 위험도는 사고피해크기와 사고발생빈도의 곱으로 표현하며, 안전장치의 설치는 해당설비의 사고발생 빈도를 감소시킴으로써 위험도를 감소시킨다. 이와 같은 화학시설의 다양한 안전장치 중 대표적인 경우가 병렬구조를 적용하는 것이다. 예를 들면 여분의 펌프가 준비되어 두 개의 펌프 중 어느 한 요소만 작동하면 시스템은 정상적으로 기능을 발휘하는 경우이다. 하지만 장외영향평가에서 위험도를 분석할 때에는 병렬구조 안전장치의 고장률 및 고장에 따른 수리기간이 반영되어 있지 않다. 따라서 본 연구는 병렬구조 안전장치의 고장률과 수리기간을 반영하여 고장 확률과 위험도를 산출할 수 있는 개선된 산정식을 제시하고, 기존의 위험도 산정식에 따른 결과 값과 비교․분석하였다. 그 결과 개선된 산정식을 적용할 경우 더 정확한 고장 확률과 위험도를 산출할 수 있었다. 또한 고장에 따른 수리기간이 짧을수록 고장 확률과 위험도가 낮게 산출됨을 알 수 있었다. 따라서 허용 가능한 수준으로 위험도를 감소하고 낮은 수준의 위험도 등급을 받기 위해서는 유지·보수 계획을 수립할 때 고장에 따른 수리를 신속하게 수행하는 것이 중요함을 알 수 있었다. 결론적으로 본 연구는 병렬구조 안전장치의 적용에 있어서 장외영향평가 보다 더 체계적이고 정확한 위험도 산정의 기준을 제시하였다. 이로써 화학시설의 안전성 확보에 기여함과 동시에 장외영향평가 제도 발전의 계기가 될 것으로 예상된다. The risk is expressed as consequence of damage multiplied by frequency of failure in the Off-site Risk Assessment (ORA) system. The installation of a safety devices reduce the risk by reducing the frequency of failure at the facility. A typical example of various safety devices of a chemical factory is application of a parallel structure. For example, if an extra pump is ready and only one of the two pumps is operating, the system will function normally. However, when analyzing risks in the ORA system, failure rate of parallel safety devices and repair time due to the failure are not reflected. This study was conducted to present modified equation that can calculate the probability of failure and risk by reflecting the failure rate and the repair time of the parallel structure safety devices, and to compared with the risk value according to the existing risk equation. As a result, more accurate probability of failure and risk can be calculated by using the modified equation. Also, it is found that the shorter the repair time due to the failure, the lower the probability of failure and risk. Therefore, in order to reduce the risk to an acceptable level and to obtain a low level of risk rating, it is important to carry out repair according to the failure promptly when establishing maintenance plans. This study suggested a more systematic and accurate risk analysis standard than ORA in the application of parallel structure safety devices. It is also expected to contribute to securing the safety of chemical facilities and at the same time, will lead to the development of the ORA system.
ScienceON
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