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- 주제어 : Recycling scenario (검색결과 5 건)
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So-On Park,Ye-Jeon Lim,Sang-Gyoung Lee,Byung-Sik Lee 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1
In this study, the current situation of recycling domestic and foreign metal clearance waste was reviewed to suggest the optimal recycling scenario for metal clearance waste that occurs the most when decommission nuclear power plants. Factors that can directly or indirectly affect the recycling of metal clearance waste were analyzed and evaluation criteria that can be used to evaluate optimal recycling measures were prepared. Using this, a scenario for recycling the optimal metal clearance waste suitable for the domestic environment was proposed. As a result of comparing/reviewing the importance of the first level of the evaluation criteria, public acceptance, national policy, and regulatory requirements were evaluated as the most important ones, and recycling acceptance and regulatory requirements were evaluated as the most important the second level of evaluation criteria. As a result of reviewing the clearance waste recycling scenario, it was evaluated that unrestricted recycling scenario was preferred. This may be because the survey subjects are composed of experts in the nuclear power field, so they know recycling of clearance waste in general industries does not significantly affect radiation safety. However even if it is clearance waste, the public may feel reluctant to recycle just because it was discharged from nuclear power plants, so policy and institutional improvements are needed to reassure the public along with the scientific safety of clearance waste. In addition, in order to improve public acceptance, it seems necessary to prepare specific measures to ensure the participation of public in the entire decommissioning process, share related information, and disclose all routes from generation to disposal of decommissioning waste. Considering that research on domestic clearance waste recycling options has not been activated, this study is significant in that it derives a scenario for recycling metal clearance waste that can be implemented. Also, it is expected that the evaluation criteria derived from this study will be used significantly when establishing a radioactive waste management strategy.
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Thenepalli Thriveni,Chilakala Ramakrsihna,안지환 한국에너지학회 2019 에너지공학 Vol.28 No.1
Currently, the global atmosphere around the world is altering at a very rapid pace. Among those changes,some are beneficial, but most of the changes are lead to destruction to our planet. The area of environmentalscience is a significant resource for learning more about these changes. Due to the urbanization, the humanpopulation is increasing, natural resources becoming very limited. To solve the limited resources issues,recycling is absolutely an alternative source for the new demands and limitations. Recycling education isvery important to raise awareness among students and their communities about the need for recycling andwhat materials are recyclable locally. In this paper, we reported the role of sustainability science andtechnology and the impact of recycling research education in the middle schools, both in developingcountries and Asian countries and also we included the brief data of global recycling of waste.
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2PC 알루미늄 캔 최적처리를 위한 시나리오 비교 응용
정찬교 수원대학교 산업기술연구소 2003 산업기술연구소논문집 Vol.18 No.-
In this study, the environmental evaluation of aluminium can treatment stages(recycling, landfill, incineration) was assessed by LCA(Life Cycle Assessment) which is one of the environmental impact assessment tools. We are compared disposal process scenario(recycling 80%, landfill 10%, incineration 10%) with incineration 100%, landfill 100%, and recycling 100%. Also, we are considered Al raw material, production, and disposal stage of 2PC Al CAN as life cycle impact assessment. As a result, Al raw material production is found to have more environmental burden than production and disposal stage. Moreover, compared with other stages, recycling process was most superior in environmental field. Therefore environmental burden of disposal scenario was decreased 80% than other stages(landfill, incineration).
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RECYCLING OPTION SEARCH FOR A 600-MWE SODIUM-COOLED TRANSMUTATION FAST REACTOR
이용교,김명현 한국원자력학회 2015 Nuclear Engineering and Technology Vol.47 No.1
Four recycling scenarios involving pyroprocessing of spent fuel (SF) have been investigatedfor a 600-MWe transmutation sodium-cooled fast reactor (SFR), KALIMER. Performanceevaluation was done with code system REBUS connected with TRANSX and TWODANT. Scenario Number 1 is the pyroprocessing of Canada deuterium uranium (CANDU) SF. Because the recycling of CANDU SF does not have any safety problems, the CANDU-Pyro-SFR system will be possible if the pyroprocessing capacity is large enough. ScenarioNumber 2 is a feasibility test of feed SF from a pressurized water reactor PWR. Thesensitivity of cooling time before prior to pyro-processing was studied. As the cooling timeincreases, excess reactivity at the beginning of the equilibrium cycle (BOEC) decreases,thereby creating advantageous reactivity control and improving the transmutation performanceof minor actinides. Scenario Number 3 is a case study for various levels of recoveryfactors of transuranic isotopes (TRUs). If long-lived fission products can beseparated during pyroprocessing, the waste that is not recovered is classified as low- andintermediate-level waste, and it is sufficient to be disposed of in an underground site due tovery low-heat-generation rate when the waste cooling time becomes >300 years at a TRUrecovery factor of 99.9%. Scenario Number 4 is a case study for the recovery factor of rareearth (RE) isotopes. The RE isotope recovery factor should be lowered to 20% in order tomake sodium void reactivity less than <7$, which is the design limit of a metal fuel
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김양화,임재완,박규열,임옥택 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.4
Electric vehicles contribute greatly to energy conservation, CO2 reduction and energy security through high fuel economy and various electric sources. Electric cars have a huge economic impact. More than 14 million hybrid electric cars have been sold worldwide. More than 3 million plug-in electric vehicles have been sold worldwide. The environmental impact depends greatly on the amount of national power generation, and as the electric grid becomes more and more carbon-intensive, countries are increasingly adopting hybrid and electric vehicles. Electricity is expanding beyond cars. Electric buses, trucks, and ships have similar benefits.
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