• Nuclear Engineering and Technology
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• 제56권3호
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• pp.855-865
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• 2024

Commercial deployment of nuclear microreactors presents an opportunity for the industry to rethink its approach to manufacturing, siting, operation and maintenance, and fuel cycle management as certain principles used in grid-scale nuclear projects are not applicable to a decentralized microreactor economy. The success of this nascent industry is dependent on its ability to reduce infrastructure, logistical, regulatory and lifecycle costs. A utility-like 'Central Facility' that consolidates the services required and responsibilities borne by vendors into one or a few centralized locations will be necessary to support the deployment of a fleet of microreactors. This paper discusses the requirements for a Central Facility, its implications on the cost structures of owners and suppliers of microreactors, and the impact of the facility for the broader microreactor industry. In addition, this paper discusses the pre-requisites for eligibility as well as the opportunities for a Central Facility host site. While there are many suitable locations for such a capability across the U.S., this paper considers a facility co-located with the Vogtle Nuclear Power Plant and Savannah River Sites to illustrate how a Central Facility can leverage the existing infrastructure and stimulate a local ecosystem.

• Nuclear Engineering and Technology
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• 제56권6호
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• pp.1959-1974
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• 2024

Nuclear energy plays a crucial role in energy supply in the 21st century, and more and more Nuclear Power Plants (NPPs) will be in operation to contribute to the development of human society. However, as a typical complex system engineering, the operation and development of NPPs require efficient and stable control methods to ensure the safety and efficiency of nuclear power generation. Reinforcement learning (RL) aims at learning optimal control policies via maximizing discounted long-term rewards. The reward-oriented learning paradigm has witnessed remarkable success in many complex systems, such as wind power systems, electric power systems, coal fire power plants, robotics, etc. In this work, we try to present a systematic review of the applications of RL on these complex systems, from which we believe NPPs can borrow experience and insights. We then conduct a block-by-block investigation on the application scenarios of specific tasks in NPPs and carried out algorithmic research for different situations such as power startup, collaborative control, and emergency handling. Moreover, we discuss the possibilities of further application of RL methods on NPPs and detail the challenges when applying RL methods on NPPs. We hope this work can boost the realization of intelligent NPPs, and contribute to more and more research on how to better integrate RL algorithms into NPPs.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.131.1-131.1
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• 2010

This study was conducted for engineering optimization for the gasification process which is the key factor for success of Taean IGCC gasification plant which has been driven forward under the government support in order to expand to supply new and renewable energy and diminish the burden of the responsibility for the reduction of the green house gas emission. The gasification process consists of coal milling and drying, pressurization and feeding, gasification, quenching and HP syngas cooling, slag removal system, dry flyash removal system, wet scrubbing system, and primary water treatment system. The configuration optimization is essential for the high efficiency and the cost saving. For this purpose, it was designed to have syngas cooler to recover the sensible heat as much as possible from the hot syngas produced from the gasifier which is the dry-feeding and entrained bed slagging type and also applied with the oxygen combustion and the first stage cylindrical upward gas flow. The pressure condition inside of the gasifier is around 40~45Mpg and the temperature condition is up to $1500{\sim}1700^{\circ}C$. It was designed for about 70% out of fly ash to be drained out throughout the quenching water in the bottom part of the gasifier as a type of molten slag flowing down on the membrane wall and finally become a byproduct over the slag removal system. The flyash removal system to capture solid particulates is applied with HPHT ceramic candle filter to stand up against the high pressure and temperature. When it comes to the residual tiny particles after the flyash removal system, wet scurbbing system is applied to finally clean up the solids. The washed-up syngas through the wet scrubber will keep around $130{\sim}135^{\circ}C$, 40~42Mpg and 250 ppmv of hydrochloric acid(HCl) and hydrofluoric acid(HF) at maximum and it is turned over to the gas treatment system for removing toxic gases out of the syngas to comply with the conditions requested from the gas turbine. The result of this study will be utilized to the detailed engineering, procurement and manufacturing of equipments, and construction for the Taean IGCC plant and furthermore it is the baseline technology applicable for the poly-generation such as coal gasification(SNG) and liquefaction(CTL) to reinforce national energy security and create new business models.

• 한국응용곤충학회지
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• 제55권2호
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• pp.177-188
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• 2016

알파 프로테박테리아(${\alpha}-proteobacterium$)인 볼바키아(Wolbachia) 세균은 절지동물 세포내의 중요한 공생균 중의 하나이다. 그람 음성 세균인 이 공생균은 기주동물의 여러 생물적 과정에 관여하고 있으며, 현재 생물적 방제 수단으로 주목 받고 있다. 볼바키아는 기주 세포의 세포질에 서식하는 세균인데 암컷을 통하여 세대간 전염된다. 볼파키아의 감염 개체 밀도를 높이기 위해 기주의 생식방식을 조작하는 다양한 전략을 발달시켰다. 볼바키아 유전자형 계통은 볼바키아 표면 단백질(WSP)의 고변이영역 아미노산 서열과 복합좌위 서열 타이핑(Multilocus sequence typing, MLST)으로 결정된다. 상이한 유전계통 판별은 wsp, 16S rRNA, ftsZ, gltA, groEL 등 유전자 분자표지를 이용하게 된다.. 이 계통 볼바키아 세균과 그들의 우월한 표현형이 농업해충과 인간의 질병매개 곤충에 대한 방제 프로그램에서 이용 가능성이 고려되고 있다. 볼바키아 표현형들은 세포질불일치(cytoplasmic incompatibility, CI), 단성생식 유도(parthenogenesis induction, PI), 여성화(feminization, F), 수컷치사(male killing, MK) 등을 유발하는 것으로 알려져 있다. 기타 볼바키아 세균의 농업과 위생곤충 방제 프로그램에서 응용 방안을 고찰하였다.

• Journal of Plant Biology
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• 제7권2호
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• pp.9-13
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• 1964

As to the up-lnd bamboos, I have reported, in my previous works, that Korea has two species in the genus of Pseudosasa, four in Pleioblastus, and other four in Sasa. In the present work, I dealt with Sasamorpha Purpurascens Nakai var. Borealis Nakai which proved the strongest vitality of all up-land bamboo yet found in various up-lands of Korea, and which might be most important from the utility view-point. This report is chiefly on its procreation. Sasamorpha Purpurascens Nakai var. Borealis Nakai can be found almost everywhere throughout the country, and its leaves and stems are much used in farms in various forms of manufacture. It is also welcomed as the feed for livestocks and as cover plants for aforestation, especially as the excellent means of errosion control on devastated hill sides. It is also widely accepted that it will provide, in the immediate future, abundant sources for the up-land bamboo pulp. As the first phase of my research plan on the subject, I undertook to determine the possible best way of its procreation, for which were included the experiments of inducing the growth of subterranean stems, the entire stand cutting, transplanting, reclaimed planting after burning etc. in order to observe the plant elongation, growing conditon, climatical effect etc. What has been fuond out so far given here as follows: 1) Of the various sections of the country, Mt. Odae area gives out the most excellent Sasamorpha Purpurascens Nakai var. Borealis Nakai(the leaf weight of which is 450 gr.) and Taekwanryong area comes the next class. This species can be transplanted anywhere in the South Korea. 2) The elongation of S.P. Nakai var. Borelais begins at around the middle of May and almost completely stops by the 20th of August. 3) The best studied transplanting season is supposed to be Feb. -April, for those transplanted during that period proved 100% of success. The next best transplanting season may be October. Rain fall does not have so much effect on transplanting as the growing season does. 4) In inducing the subterranean stems, the growing season can be ignored. The root expnsion is most animated during the months of April-June, the most active season for water absorption. Those stems induced during the winter proves more rapid growth. 5) The entire stand cutting shows greater growth than the reclaimed planting after burning and that, the growth is most vigorous during May-July, whereas during the hottest months of Aug-Sept. the growth shows only 5 cm. The new shoots grow slower both in the field of entire stand cutting and in the field of reclaimed planting after burning than in the otherwise fields.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.51-52
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• 2017

"Plant genetic resources for food and agriculture" means any genetic material of plant origin of actual or potential value for food and agriculture. "Genetic material" means any material of plant origin, including reproductive and vegetative propagating material, containing functional units of heredity. (Internal Treaty on Plant Genetic Resources for Food and Agriculture, ITPGRFA). The "Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization (ABS) to the Convention on Biological Diversity (shortly Nagoya Protocol)" is a supplementary agreement to the Convention on Biological Diversity. It provides a transparent legal framework for the effective implementation of one of the three objectives of the CBD: the fair and equitable sharing of benefits arising out of the utilization of genetic resources. The Nagoya Protocol on ABS was adopted on 29 October 2010 in Nagoya, Japan and entered into force on 12 October 2014, 90 days after the deposit of the fiftieth instrument of ratification. Its objective is the fair and equitable sharing of benefits arising from the utilization of genetic resources, thereby contributing to the conservation and sustainable use of biodiversity. The Nagoya Protocol will create greater legal certainty and transparency for both providers and users of genetic resources by; (a) Establishing more predictable conditions for access to genetic resources and (b) Helping to ensure benefit-sharing when genetic resources leave the country providing the genetic resources. By helping to ensure benefit-sharing, the Nagoya Protocol creates incentives to conserve and sustainably use genetic resources, and therefore enhances the contribution of biodiversity to development and human well-being. The Nagoya Protocol's success will require effective implementation at the domestic level. A range of tools and mechanisms provided by the Nagoya Protocol will assist contracting Parties including; (a) Establishing national focal points (NFPs) and competent national authorities (CNAs) to serve as contact points for information, grant access or cooperate on issues of compliance, (b) An Access and Benefit-sharing Clearing-House to share information, such as domestic regulatory ABS requirements or information on NFPs and CNAs, (c) Capacity-building to support key aspects of implementation. Based on a country's self-assessment of national needs and priorities, this can include capacity to develop domestic ABS legislation to implement the Nagoya Protocol, to negotiate MAT and to develop in-country research capability and institutions, (d) Awareness-raising, (e) Technology Transfer, (f) Targeted financial support for capacity-building and development initiatives through the Nagoya Protocol's financial mechanism, the Global Environment Facility (GEF) (Nagoya Protocol). The Rural Development Administration (RDA) leading to conduct management agricultural genetic resources following the 'ACT ON THE PRESERVATION, MANAGEMENT AND USE OF AGRO-FISHERY BIO-RESOURCES' established on 2007. According to $2^{nd}$ clause of Article 14 (Designation, Operation, etc. of Agencies Responsible for Agro-Fishery Bioresources) of the act, the duties endowed are, (a) Matters concerning securing, preservation, management, and use of agro-fishery bioresources; (b) Establishment of an integrated information system for agro-fishery bioresources; (c) Matters concerning medium and long-term preservation of, and research on, agro-fishery bioresources; (d) Matters concerning international cooperation for agro-fishery bioresources and other relevant matters. As the result the RDA manage about 246,000 accessions of plant genetic resources under the national management system at the end of 2016.

• 한국응용곤충학회지
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• 제56권2호
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• pp.187-193
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• 2017

솔수염하늘소는 소나무에 시들음 증상을 유발하여 괴사시키는 소나무재선충을 매개하는 대표적 매개충이다. 소나무재선충병 고사목 방제살충처리 방법으로 훈증방법을 대체할 수 있는 그물망을 이용한 방제법이 도입되고 있다. 본 연구는 솔수염하늘소의 쏠기와 탈출 행동을 유발시키는 조건을 구명하기 위하여 구속 공간 및 온도를 달리 처리하고 탈출여부를 조사하였다. 솔수염하늘소는 직경 30 mm 이하의 공간에 구속되었을 때 장애물을 뚫고 탈출이 가능하였다. 온도 $15^{\circ}C$에서는 탈출에 성공하지 못하였으며, $20{\sim}30^{\circ}C$ 범위에서 탈출 성공률이 높았다. 먹이를 이용한 솔수염하늘소의 유인은 탈출 성공률에 영향을 미치지 않았다. 좁은 공간에 구속되지 않는 경우는 갉는 부위가 집중되지 않아 탈출공을 형성하지 못하였다. 구속된 공간에서 솔수염하늘소는 가운데와 뒷다리 부절을 이용해 좁은 공간에서 몸을 이동시키며 큰턱으로 정면에 있는 장애물을 집중적으로 갉아서 탈출공을 만들고 앞다리를 뻗어 몸을 지탱하면서 빠져나오는 행동을 보였다. 본 연구의 결과는 훈증 대체기술로 제시되고 있는 구속 그물망의 성능을 평가하는데 중요한 기초자료로 활용될 수 있을 것이다.

• Weed & Turfgrass Science
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• 제4권1호
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• pp.18-25
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• 2015

DNA 바코드는 게놈 DNA의 단편을 이용해 형태적 지식없이 종을 동정하는 방법으로 전 세계적으로 최근에 많이 이용하고 있으며 고등식물에서는 엽록체 rbcL과 matK 유전자를 이용하고 있다. 본 연구에서는 표준 식물 바코드마커와 핵 ITS 부위를 이용하여 국내 포아풀아과 잡초 16속 29종 163생태형의 바코드 데이터를 생산하는 것을 목적으로 하였다. 더불어 포아풀아과의 바코드에서 각 마커의 효율성도 조사하였다. 바코드 결과 PCR 증폭과 염기서열 분석성공률은 rbcL에서 가장 높았으며 matK에서 가장 낮았다. 반대로 바코드 갭은 matK에서 가장 높은 반면 rbcL에서 가장 낮았으며, 종 식별 해상력은 matK에서 가장 높고, ITS에서 가장 낮았다. 그러나 바코드 갭과 종 식별 해상력이 가장 높은 matK를 포아풀아과에서 바코드 마커로 이용하는 것은 너무 낮은 PCR 증폭과 염기서열 분석성공률(58.3%) 때문에 고려해야할 것으로 생각된다. 단일마커로 rbcL과 ITS는 포아풀아과의 바코드에 적절하게 이용될 수 있으며, 두 마커를 조합으로 이용하면 공통으로 분석된 샘플에 따라 바코드 갭과 종 식별 해상력을 높일 수 있었다. 포아풀아과의 바코드데이터는 미국의 국립생물공학정보센터에 기탁하여 genbank 번호를 부여받아 공개하였다.

• 디지털융복합연구
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• 제11권10호
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• pp.263-275
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• 2013

최근 M&A는 기업의 경쟁력을 확보하기 위한 중요한 전략적 의사결정이며 이러한 M&A를 추진하는 기업들은 증가하고 있는 추세이다. 그러나 M&A의 성공은 흔한 일이 아니며 M&A가 성공하기 위해서는 인수기업의 최고경영자의 리더십과 함께 인적통합전략의 실천으로 구성원에 대한 관리가 선행되어야 할 것이다. 이에 본 연구에서는 M&A기업들이 궁극적인 성공을 위해서 구성원들의 변화에 대한 저항을 극복하는 것이 중요하다는 인식을 바탕으로, 성공적인 M&A를 마무리하고 성과를 내고 있는 LG화학(현대석유화학 인수) 사례를 중심으로 최고경영자의 리더십과 인적통합전략이 구성원들의 변화저항, 수용 그리고 성과에 미치는 영향을 실증적으로 규명하고자 한다. 이를 위해 먼저 최고경영자의 리더십과 인적통합전략 등 기존 연구를 살펴보았으며 이를 기반으로 LG화학(대산공장) 담당자 및 구성원들과의 인터뷰를 통해 M&A이후 최고경영자의 전략적 리더십과 인적통합이 어떻게 발현되는지를 살펴보았다. 그 결과 인수기업을 빠른 시일 내에 정상화하기 위해서는 최고경영자의 전략적 리더십과 인적통합전략이 중요한 변화동인임을 확인할 수 있었다. 이러한 사례연구를 통해 M&A이후 실질적인 통합방안과 리더십 발현방안을 제안하여 향후 M&A를 추진하는 기업들에게 시사점을 제공하고자 한다.

• 대한지리학회지
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• 제31권3호
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• pp.489-507
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• 1996

이 연구는 수도권 무등록공장 문제를 분석하고 이 문제를 줄일 수 있는 개선안을 모색하고자 한 것이다. 최근에도 무등록공장이 계속 증가하고 있는 것은 현행 수도권정비정책이 이들의 입지적 및 현실적 특성을 고려하지 않은데에 있다. 지금까지의 규제중심에서 규제완화, 지원중심의 시책을 강조하고, 현행과 같은 넓은지역에 획일적인 규제보다는 다수의 소구역을 설정하여 지역적 특성과 업종의 특성에 따라 다양한 규제방안을 도입할 것을 제안한다. 대도시에 공장과 환경오염 배출을 허용하자는 것이 아니라 현행 제도에서는 무등록공장의 환경오염을 방치하고 있으므로 환경문제관리를 제도적으로 할 수 있게 해야한다. 국제경쟁이 심해지는 오늘날 수도권이 갖고 있는 최적의 산업입지 조건을 가장 효율적으로 활용할 수 있는 공업 진흥정책이 시급하다.