• Proceedings of the Korean Radioactive Waste Society Conference
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• 2005.11a
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• pp.21-21
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• 2005

• Proceedings of the Korean Nuclear Society Conference
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• 1995.05b
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• pp.1087-1092
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• 1995

MOX 연료는 PWR, BWR, FBR 및 ATR 등과 같은 다양한 노형에서 이용이 가능하다. 이와 같은 MOX 연료는 이미 일부 국가에서 이들 노형에 이용하고 있으며, FBR의 상용화 시기가 다소 지연될 것으로 예상되어 이 분야에 대찬 연구는 더욱 활발히 진행될 전망이다. 여기에서는 이와 같은 현실을 감안하여 MOX 연료를 이용하는 MOX 연료주기와 우라늄 연료만을 이용하는 우라늄 연료주기에 대한 핵연료주기비를 비교·분석하였고, 그 결과 MOX 연료주기와 우라늄 연료주기의 경제성은 거의 대둥한 것으로 평가되었다. 또한 우라늄 가격, 사용후핵연료 처분시기, 처분 비용/재처리비용 등의 주요 변수에 대한 민감도분석을 수행한 결과, MOX 연료주기가 우라늄연료주기에 대해 상당한 경쟁력을 가지고 있는 것으로 분석되었다.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.14 no.4
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• pp.305-320
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• 2016

The metal waste generated during nuclear power plant decommissioning constitutes a large proportion of the total radioactive waste. This study investigates the current status of domestic and international regulatory requirements for clearance and the clearance experience of domestic institutions. The RESRAD-RECYCLE code was used for analyzing the clearance of the metal wastes generated during actual nuclear power plant decommissioning, and assessment of the exposure dose of twenty-six scenarios was carried out. The evaluation results will be useful in preliminary analysis of clearance and recycling during nuclear power plant decommissioning. As a next step, the effects of reducing disposal costs by clearance can be studied.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2005.06a
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• pp.328-329
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• 2005

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2008.11a
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• pp.90-91
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• 2008

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2008.11a
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• pp.88-89
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• 2008

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2008.05a
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• pp.169-170
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• 2008

• Journal of the Korean Society of Radiology
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• v.12 no.2
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• pp.139-148
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• 2018

Assessment of NPP(Nuclear Power Plant) decommissioning cost is very important for safe decommissioning of nuclear power plants. In the United States, which has the most NPP decommissioning experience, the cost evaluation study has been conducted since the 1970s in order to decommissioning nuclear facilities. The US NRC has conducted studies on decommissioning technology, safety and cost for a variety of reactor type and nuclear installations. In the total decommissioning costs, the end of operation licenses accounted for the largest portion, followed by spent fuel management and site restoration. In case of immediate decommissioning, spent fuel management cost increased compared to delayed decommissioning, and delayed deocmmissioning increased the cost of terminating the operation license. However, in general, delayed decommissioning does not show any significant benefit as compared with immediate decommissioning. It is necessary to consider the evaluation according to the site conditions when evaluating the cost of decommissioning domestic nuclear power plants. Also, in Korea, IAEA recommendations were applied to reorganize the radioactive waste classification system. Therefore, it is necessary to develop a method to appropriately use the decommissioning data of the preceding US Nuclear Power Plant in the new classification system when estimating the amount of radioactive waste generated during decommissioning. In particular, the establishment of the evaluation methodology for the waste to be disposed of will be an important factor in securing the accuracy of the decommissioning cost. In addition, it is necessary to construct information data that can be applied to facility characteristics and work characteristics in order to evaluate the cost of demolition of domestic nuclear power plants.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.6 no.2
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• pp.141-145
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• 2008

Due to the uncertainties resulting from cost projection, evaluation over long term period, and adequacy of applied discount rate, the economic assessment for back-end fuel cycle is different from each organizations or individuals. In this paper, the features and limitations of some noticeable economic evaluations were investigated and analysed to contribute for the public participation and back-end fuel cycle policy related researches. As a result of analysis, we found that the reprocess and recycling is more economical than direct disposal option, but the result includes high uncertainty that depends on the input parameters.

• Clean Technology
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• v.19 no.4
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• pp.355-369
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• 2013

Economic feasibility is one of the most important factors in energy production from regenerative biomass. From the aspect, biogas from anaerobic digestion of wastewater sludge is regarded as the most economical because of its cheap substrate and additional income from the disposal of waste sludge. Sludge hydrolysis has been regarded as the rate limiting step of anaerobic digestion and many sludge pre-treatment technologies have been developed to accelerate anaerobic sludge digestion for enhanced biogas production. Various sludge pre-treatment technologies including biological, thermo hydrolysis, ultrasonic, and mechanical methods have been applied to full-scale systems. Sludge pre-treatment increased the efficiency of anaerobic digestion by enhancing hydrolysis, reducing residual soilds, and increasing biogas production. This paper introduces the characteristics of various sludge pre-treatment technologies and the energy balance and economic feasibility of each technology were compared to prepare a guideline for the selection of feasible pre-treatment technology. It was estimated that thermophilic digestion and thermal hydrolysis were most economical technology followed by Cell rupture$^{TM}$, OpenCEL$^{TM}$, MicroSludge$^{TM}$, and ultrasound. The cost for waste sludge disposal shares the biggest portion in the economic analysis, therefore, water content of the waste sludge was the most important factor to be controlled.