• 대한방사선기술학회지:방사선기술과학
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• 제44권4호
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• pp.351-358
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• 2021

This research project is a program promoted to seek diversification of domestic radioactive waste analysis institutions, and seeks public development, win-win cooperation, and cooperation between the entrusted institution and the entrusted institution. Accordingly, the entrusted institution established a standard analysis procedure for establishing a quality control system for radioactivity analysis, establishing a radiation control zone, obtaining KOLAS accreditation, and performing proficiency tests, which are the performance ranges requested by the entrusted institution, and intersecting the radioactive isotope waste generated at the actual site. Verification was performed to confirm the analysis quality. In addition, facilities and equipment for radioactivity analysis were supplemented and expanded, and the basic technology foundation and technical skills were secured through securing professional technicians and education/training. It is judged that the entrusted institution will contribute to securing radiation safety through the smooth execution of treatment, disposal, and transportation through value creation and analysis of radioactive waste generated by radioactive isotope-using institutions (research institutes, hospitals, industries, etc.) by succeeding in this research project do.

• 방사성폐기물학회지
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• 제21권2호
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• pp.255-269
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• 2023

Compared to operational wastes, nuclear power plant (NPP) decommissioning wastes are generated in larger quantities within a short time and include diverse types with a wider range of radiation characteristics. Currently used 200 L drums and IP-2 type transport containers are inefficient and restrictive in packaging and transporting decommissioning wastes. Therefore, new packaging and transport containers with greater size, loading weight, and shielding performance have been developed. When transporting radioactive materials, radiological safety should be assessed by reflecting parameters such as the type and quantity of the package, transport route, and transport environment. Thus far, safety evaluations of radioactive waste transport have mainly targeted operational wastes, that have less radioactivity and a smaller amount per transport than decommissioning wastes. Therefore, in this study, the possible radiation effects during the transport from NPP to disposal facilities were evaluated to reflect the characteristics of the newly developed containers and decommissioning wastes. According to the evaluation results, the exposure dose to transport workers, handling workers, and the public was lower than the domestic regulatory limit. In addition, all exposure dose results were confirmed, through sensitivity analysis, to satisfy the evaluation criteria even under circumstances when radioactive materials were released 100% from the container.

• 유기물자원화
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• 제17권4호
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• pp.81-90
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• 2009

현재 가동 중인 생활폐기물 소각시설이 약 35여개소 정도 있으며, 폐기물관리 정책에 따라 폐기물을 효율적으로 재활용하고 발생을 최소화하기 위하여 폐기물 발생억제, 감량, 재이용, 재활용, 에너지 회수를 포괄하는 개념으로 소각을 통해 최종처리되는 폐기물을 최소화하려는 정책이다. 하지만, 소각 후에 발생하는 소각재에서 일부 항목(Cu, Pb)의 중금속용출이 기준치를 초과하는 것으로 나타나 커다란 사회적 문제가 제기되어 이에 대한 대책방안을 모색하게 되었다. 소각재에 포함된 중금속인 유해물질을 용출 확산되지 않도록 소각재에 대한 화학약품처리 방식인 중금속 용출억제제를 혼합하여 용출되지 않도톡 안정화시설을 개발하여 2차 환경오염의 확산억제외 바닥재 함유 중금속의 안정화 효율을 증대된 것으로 조사되었다.

• 청정기술
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• 제22권3호
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• pp.181-189
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• 2016

본 연구는 음식물류폐기물 자원화시설의 최적화 이행지표를 적용하여 퇴비화시설과 사료화시설을 평가하고자 실시되었다. 2014년 현재 생활폐기물 중 음식물류폐기물은 약 27%이며, 재활용이 97.2%, 매립과 소각은 각각 0.9%와 1.9%로 미미하였다. 2014년 운영되는 음식물류폐기물 자원화시설은 총 105개소이며, 퇴비화와 사료화 시설이 각각 52개소(49.5%)와 24개소(22.9%)로 많았고, 하수병합 및 기타 시설이 29개소로 나타났다. 최적화 이행지표 평가 결과 기술성에서 사료화시설이 30점 만점 중 18.3점으로 퇴비화시설의 17.7점 보다 다소 높았으며, 환경성에서도 사료화 시설이 30점 만점 중 18.3점으로 퇴비화시설의 16.7점 보다 다소 높았다. 그러나 경제성 평가에서는 사료화시설이 40점 만점 중 25.0점을 차지하여 퇴비화시설(18.3점) 보다 크게 높은 것으로 나타났다. 기술성, 경제성, 환경성을 종합 평가한 결과에서도 100점 만점 중 사료화시설은 61.5점으로 퇴비화시설의 52.7점을 앞서는 것으로 나타났다. 이는 향후 각 지자체에서 음식물류폐기물 자원화시설 선정시 유용한 자료로 활용될 수 있을 것으로 기대된다.

• 유기물자원화
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• 제27권2호
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• pp.57-66
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• 2019

본 연구는 유기성폐자원(가축분뇨, 음식물류폐기물, 음식물류폐수 등)의 바이오가스 이용에 대한 적정 설계 및 운전 기술지침서 마련하고자 현장조사와 정밀모니터링 등을 실시하였다. 정부의 중장기 바이오가스화 정책에 따라 폐자원의 자원화 시설 확충이 활발히 추진되고 있다. 하지만 생산된 바이오가스를 이용하여 도시가스 및 수송용으로 활용하는 시설은 효율이 아직은 저조하다. 전국 7개소 유기성폐자원 바이오가스화 시설을 대상으로 정밀모니터링을 실시하였다. 사계절 평균으로 정밀모니터링 결과를 정리하였을 때, 유기성폐자원 별 효율성 분석에서 유기성분해율은 VS기준 평균 66.3 %로 분석되었다. 전처리 전후 바이오가스 성상을 분석한 결과 철염 및 탈황(건식, 습식)을 이용하여 전체 시설의 $H_2S$ 평균은 949.7 ppm으로 측정되었으며, 고품질화 정제설비 전단 및 후단에서 29.0 ppm과 0.3 ppm으로 나타났다. 메탄 함량은 소화조 후단에서 65.6 %, 고품질화 정제설비 전단 및 후단에서 63.5 %와 97.5 %까지 감소하는 것을 확인하였다.

• 한국토양비료학회지
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• 제47권2호
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• pp.80-84
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• 2014

Phosphorus (P) is an essential nutrient for all living organisms. P is mostly obtained from mined rock phosphate. However, existing rock phosphate reserves could be exhausted in the next 50-100 years. As Korea is totally dependent on imported rock phosphate, we should seek for solution to overcome the P depletion by efficient use and recycling. For this, this study suggested a P flow model to identify the location and flow route of P in urban area based on traditional material flow analysis. The type of P entering the urban areas are fertilizer, food and feed. Each type of P is used in agriculture, human consumption and animal husbandry. After going through each process, P is moved to waste management facilities within food waste, excreta and sewage. Some portion of P in waste are buried, incinerated and discharged, which can be reservoir of P in the future.

• 환경위생공학
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• 제15권2호
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• pp.85-94
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• 2000

The comparative evaluation is the most effective method for site selection because the selection of waste treatment facility is to determine the optimum site out of limited candidate sites. This study adopted the ordinal scale evaluation, one of methods of comparative evaluation. The ordinal scale evaluation aims to determine the investigating items referring to the character of sites, to determine the importance factors for investigating items, and to determine the optimum site according to the quantitative evaluation. This study has focussed on reflecting the opinion of residents to the maximum extent with a weight on social and economic aspects, considering the state of confrontation against each other between the autonomous government organization and local residents, which is being emerged as a social issue relating to the evaluation rating on each item of site selection of an optimum site. Therefore, rational, and clear validity investigations and proper reduction of both time and expenses in site selection as well through this a study.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.124.2-124
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• 2001

The research for development of remote monitoring and control systems composed three stages of research categories. At the first stage, we decided the suitable instrumentation devices for interface between H/W systems and waste water treatment facility. And at the second stage, we developed the software package for remote monitoring and data transmission system including data receipt system via wired telephone line. At the final stage we developed local control system for auto-process control of waste water treatment facilities. For the first stage of research we developed the a drawing of design the instrumentation and selected optimal sensors or monitoring basic important data. After the first stage research we developed the software package with Graphic User Interface(GUI) ...

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2003년도 학술.기술논문 발표회
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• pp.103-106
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• 2003

Recently, it is increased on the concern for the reuse of waste concrete because of the shortage of natural aggregate and the increase of waste concrete. And recycled coarse aggregate is used variously, but the existing wet method producted recycled fine aggregate has problems like the high price facilities, the long time progress of the work and recycled fine aggregate of poor. The aim of this study is to investigate the possibility of the method of dry producted high qualities recycled fine aggregate. The results of this study have shown that the possibility of the method of dry is certificated as the qualities of recycled fine aggregate satisfied the KS and the compressive strength of mortar was similar to plain.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2003년도 학술.기술논문발표회
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• pp.103.1-106
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• 2003

Recently, it is increased on the concern for the reuse of waste concrete because of the shortage of natural aggregate and the increase of waste concrete. And recycled coarse aggregate is used variously, but the existing wet method producted recycled fine aggregate has problems like the high price facilities, the long time progress of the work and recycled fine aggregate of poor. The aim of this study is to investigate the possibility of the method of dry producted high qualities recycled fine aggregate The results of this study have shown that the possibility of the method of dry is certificated as the dualities of recycled fine aggregate satisfied the KS and the compressive strength of mortar was similar to plain.