• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2017년도 춘계학술논문요약집
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• pp.53-54
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• 2017

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2018년도 춘계학술논문요약집
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• pp.347-348
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• 2018

• 방사성폐기물학회지
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• 제16권1호
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• pp.11-39
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• 2018

Tritium and $^{14}C$ are two most important radionuclides released from nuclear facilities to the environment, and $^{14}C$ contributes dominant radiation dose to the population around nuclear power plants. This paper presents an overview of the production, pathway, species and levels of tritium and $^{14}C$ in nuclear facilities, mainly nuclear power plants. The methods for sampling and collection of different species of tritium and $^{14}C$ in the discharge gas from the stack in the nuclear facilities, atmosphere of the nuclear facilities and environment are presented, and the features of different methods are reviewed. The on-line monitoring methods of gaseous tritium and $^{14}C$ in air and laboratory measurement methods for sensitive determination of tritium and $^{14}C$ in collected samples, water and environmental solid samples are also discussed in detailed. Meanwhile, the challenges in the determination and speciation analysis of tritium and $^{14}C$ are also highlighted.

• 산업기술연구
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• 제38권1호
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• pp.9-13
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• 2018

FRP(Fiber Reinforced Plastic) ships are easy to manufacture and repair. Also they are more durable and cheaper than steel wires and neck lines. Therefore FRP ships are widely used in small ships. In Korea, the amount of waste FRP ships is increasing. It is expected that a large amount of waste FRP ships will be generated. Waste FRP ships are emerging as a social problem, such as the difficulty in preserving the marine environment. To improve this, a waste FRP ship melting process system has been developed. In order to construct an effective waste FRP ship processing system, it is necessary to study the treatment facilities location problem. In this paper, we suggest mathematical model to solve optimal location problem of waste FRP Ships and discuss on results by applying it to nine regions selected as candidates for treatment facilities.

• Nuclear Engineering and Technology
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• 제51권3호
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• pp.746-754
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• 2019

Vitrification of radioactive liquid waste (RLW) provides a feasible solution for isolating radionuclides from the biosphere for an extended period. In vitrification, base glass and radioactive waste are added simultaneously into the melter. Determination of heat and mass transfer rates is necessary for rational design and sizing of melter. For obtaining an assured product quality, knowledge of reaction kinetics associated with the thermal decomposition of waste constituents is essential. In this study Thermogravimetry (TG) - Differential Thermogravimetry (DTG) of eight kinds of nitrates and two oxides, which are major components of RLW, is investigated in the temperature range of 298-1273 K in the presence of base glasses of five component (5C) and seven component (7C). Studies on thermal behavior of constituents in RLW were carried out at heating rates ranging from 10 to $40\;K\;min^{-1}$ using TG - DTG. Thermal behavior and related kinetic parameters of waste constituents, in the presence of 5C and 7C base glass compositions were also investigated. The activation energy, pre-exponential factor and order of the reaction for the thermal decomposition of 24% waste oxide loaded glasses were estimated using Kissinger method.

• 방사성폐기물학회지
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• 제6권4호
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• pp.347-356
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• 2008

처분시설 성능을 유지하고 안전성을 확보하기 위해서는 방사성폐기물의 처분 적합성 여부를 확인하기 위한 폐기물 인수기준이 필요하다. 국내 처분장 조건에 맞는 인수기준을 개발하기 위해 경주 처분부지와 유사한 해외 처분장 인수기준과 국내에서 발생되는 방사성폐기물 특성을 분석하여 심층 검토하였다. 방사성폐기물 인수기준은 국내 전문연구기관인 한국원자력 연구원과의 기술용역을 통하여 개발되었으며 국내 폐기물 발생기관별 폐기물특성, 발생자의견 등 국내여건을 반영하여 기준이 설정되었다. 또한 설정된 기준은 학계, 연구계, 산업계로 구성된 기술자문협의체를 통해 협의되고 검증되었다. 폐기물인수기준은 국내에서 발생되는 폐기물을 가능한 수용할 수 있도록 폐기물발생기관의 의견을 수용하고 방사성폐기물 처분시설의 안전성을 확보할 수 있는 수준에서 개발되었다. 그러나 개발된 폐기물인수기준은 현재 각 발생기관에서 발생된 폐기물 전량을 처분할 수 있는 기준이 아니므로 본 폐기물인수기준에 부적합한 폐기물은 각 발생기관에서 별도의 처리방안을 강구하여 처분의뢰될 것으로 예상된다. 앞으로 방사성폐기물 처분시설의 인수기준은 장기 안전성이 보장되도록 핵종별 처분농도 제한치 등 관련기준은 지속적으로 보완해 나갈 계획이다.

• 환경영향평가
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• 제21권5호
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• pp.813-821
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• 2012

Environmental and public health concern for the emission of air pollutants from burn-up process in waste incineration plants located in the vicinity of living environment was increased during the past decade. The purpose of this study was to suggest of the simple and rapid method of priority setting model for the decision of full-scale public health assessment. This method was consists of total 5-step. Step 1 was "secure the satellite map" and we can use the satellite map which serves from the website such as NAVER Co. Step 2 was "drawing mesh on the map" for catch the point of occupation of environmental sensitivity facilities, and step 3 was "identification and sorting of the facilities", Step 4 was "setting of weight" using the "weighted linear combination (WLC) method". Finally, all facility was sorted by score. As a result, we can set a priority of 145 facilities based on 177 facilities which managed in local government. Facilities in Seoul metropolitan area was high rank in priority list. On the other side, Facilities located at the country or rural area was low rank because of low occupation of the house and the environmental sensitivity facilities such as kindergarten, elementary school, and hospital. In this study, we suggested simple and rapid method that using for screening procedure of public health assessment.

• 한국폐기물자원순환학회지
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• 제35권8호
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• pp.762-769
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• 2018

This study was carried out to examine the improvement plan by analyzing the characteristics of imported wastes, operation rate, and benefits of energy recovery for incineration facilities with a treatment capacity greater than 50 ton/day. The incineration facility capacity increased by 3,280 tons over 15 years, and the actual incineration rate increased to 2,783 ton/day. The operation rate dropped to 76% in 2010 and then rose again to 81% in 2016. The actual calorific value compared to the design calorific value increased by 33.8% from 94.6% in 2002 to 128.4% in 2016. The recovery efficiency decreased by 29% over 16 years from 110.7% to 81.7% in 2002. Recovery and sales of thermal energy from the incinerator (capacity 200 ton/day) dominated the operation cost, and operating income was generated by energy sales (such as power generation and steam). The treatment capacity increased by 11% to 18% after the recalculation of the incineration capacity and has remained consistently above 90% in most facilities to date. In order to solve the problem of high calorific value waste, wastewater, leachate, and clean water should be mixed and incinerated, and heat recovery should be performed through a water-cooled grate and water cooling wall installation. Twenty-five of the 38 incineration facilities (about 70%) are due for a major repair. After the main repair of the facility, the operation rate is expected to increase and the operating cost is expected to decline due to energy recovery. Inspection and repair should be carried out in a timely manner to increase incineration and heat energy recovery efficiencies.

• 방사성폐기물학회지
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• 제9권2호
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• pp.87-92
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• 2011

본 논문은 극저준위폐기물 관리에 관한 중국의 정책과 규정들을 소개하고 있다. 오래된 시설의 중요한 해체 및 부지복구 프로그램에 주어진 바와 같이, 극저준위폐기물의 처분을 위한 새로운 시설의 필요성이 대두되고 있다. 여러가지 일반적인 설계원리들은 다중방벽에 의해 폐기물을 격리시키는 중저준위폐기물 처분시설과 같다. 콘크리트 방벽을 사용하는 것 대신에 벤토나이트 또는 고밀도 폴리에틸렌 멤브레인을 사용하는 것 외에 통상적으로 처분시설의 설계는 위해폐기물 처분시설의 설계와 같다 극저준위폐기물 처분시설 2개소의 공학적 설계가 소개되었다.

• 유기물자원화
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• 제18권3호
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• pp.60-67
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• 2010

우리나라의 대형 생활폐기물소각시설의 건설시기를 보면 상당수가 1980년대 후반인 것을 알 수 있다. 대부분의 시설들은 이 시기에 설계되었으며 그 후에 건설된 소각로 역시 변경이나 조정 없이 시설해온 것으로 조사되고 있다. 그러나 소각로에 반입되는 폐기물의 성상은 정부의 폐기물수거 정책에 의해 급격히 변화하고 있다. 이는 생활폐기물의 발열량변화를 조사해 봄으로도 쉽게 알 수 있다. 그 결과 많은 소각시설에서 과열에 의해 내화물과 화격자가 손상되고 있다. 한편 보일러 전열면에 클링커가 생성되어 열전달에 방해를 줌으로 이용열량이 줄어들 뿐만 아니라 연소실의 온도가 상승되는 등 원하지 않는 현상이 연속되고 있다. 이를 개선하기 위해 폐기물저장고에 물을 뿌리거나, 분리수거해 온 음식물류 폐기물을 다시금 혼합하여 혼소하거나 연소실에 물을 분사하는 방법을 동원하고 있다. 이러한 방법은 근본적인 해결책이 되지 않으며, 설계부터 다시 하여 새로 시설하는 것 또한 비용적인 측면에서 효과적이지 못하다. 따라서 본 연구를 통해 위와 같은 문제를 원천적으로 해결 하기위한 방법을 도출해 보았다.