• Nuclear industry
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• v.21 no.3 s.217
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• pp.39-45
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• 2001

• Journal of Korea Technology Innovation Society
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• v.8 no.spc1
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• pp.499-524
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• 2005

The economic spillover effect from technology self-reliance of NSSS(nuclear steam supply system) by Korea Atomic Energy Research Institute was evaluated. Both production spillover effect and value added spillover effect were estimated by using Input-Output table. The production spillover effect from technology self-reliance of NSSS was estimated as 135 trillion Won during 1986-2015, while the value added spillover effect was 69 trillion Won during the same period. Besides, it was found that the technology self-reliance made great contribution to unquantifiable economic benefits such as enhancement of overall nuclear technology level, improvement of the role in international nuclear society, and improved potential to nuclear technology export.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.11a
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• pp.1523-1529
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• 2017

신정부의 탈원전 정책에 의해 급속하게 원자력계를 둘러싼 환경이 변하고 있다. 지금까지의 정부가 추진해온 원자력 중심의 전원계획이 신재생에너지 확대를 위한 계획으로 변화되어 가고 있다. 그리고 이러한 정부 정책 추진의 중심에는 매우 높은 대통령 지지율이 기반이 되고 있다. 하지만 여러 여론 조사 결과를 살펴보면 대통령은 약 65% 내외의 지지를 기록함에도 불구하고 원자력 활용에 대해서는 찬반 의견이 매우 팽팽하다. 즉, 원자력에 대한 이슈가 최근 에너지, 경제 문제가 아닌 정치 이슈가 된 상황에서도 원자력에 대해 지지를 보여주는 집단이 존재한다는 것을 뜻한다. 하지만 원자력을 지지하는 일반인들이 정치권과 탈핵 시민단체에서 원자력 분야를 소위 '적폐'로 규정하고 '원자력 마피아'로 명명한 상태에서 원자력에 대해 드러내놓고 지지하는 것은 쉽지 않다. 따라서 본 연구는 우리나라의 어떠한 계층에서 원자력을 지지하는지, 즉 'Shy Nuclear'를 찾고 이 지지층들의 특징에 대해서 분석하였다. 지지층 분류를 위해서 머신러닝의 분류분석 기법인 Decision Tree Analysis(의사결정나무) 방법론을 활용하였다. 분석 결과 Shy Nuclear를 결정하는 주 요인은 거주지역으로 나타났다. 아울러 수도권에 거주하고 있는 사무/관리/전문직/퇴직자 집단이 가장 원자력에 높은 호감도(긍정 76.1%)를 보여주었다.

• Nuclear Engineering and Technology
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• v.49 no.3
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• pp.534-540
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• 2017

The adsorption of uranium (VI) by calcium alginate beads was examined by batch experiments. The effects of environmental conditions on U (VI) adsorption were studied, including contact time, pH, initial concentration of U (VI), and temperature. The alginate beads were characterized by using scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. Fourier transform infrared spectra indicated that hydroxyl and alkoxy groups are present at the surface of the beads. The experimental results showed that the adsorption of U (VI) by alginate beads was strongly dependent on pH, the adsorption increased at pH 3~7, then decreased at pH 7~9. The adsorption reached equilibrium within 2 minutes. The adsorption kinetics of U (VI) onto alginate beads can be described by a pseudo first-order kinetic model. The adsorption isotherm can be described by the Redlich-Peterson model, and the maximum adsorption capacity was 237.15 mg/g. The sorption process is spontaneous and has an exothermic reaction.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2004.11a
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• pp.485-497
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• 2004

• Nuclear Engineering and Technology
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• v.54 no.10
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• pp.3682-3694
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• 2022

The expansion of a country's ecological footprint generates resources for economic development. China's import bill and carbon footprint can be reduced by investing in green transportation and energy technologies. A sustainable environment depends on the cessation of climate change; the current study investigates nuclear energy efficiency, economic complexity, air transportation, and industrial improvement for reducing environmental footprint. Using data spanning the years 1983-2016, the dynamic autoregressive distributed lag simulation method has demonstrated the short- and long-term variability in the impact of regressors on the ecological footprint. The study findings revealed that economic complexity in China had been found to have a statistically significant impact on the country's ecological footprint. Moreover, the industrial improvement process is helpful for the ecological footprint in China. In the short term, air travel has a negative impact on the ecological footprint, but this effect diminishes over time. Additionally, energy innovation is negative and substantial both in the short and long run, thus demonstrating its positive role in reducing the ecological footprint. Policy implications can be extracted from a wide range of issues, including economic complexity, industrial improvement, air transportation, energy innovation, and ecological impact to achieve sustainable goals.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.05a
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• pp.547-553
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• 2001

A ideal Methodology is a technology that efficiently utilize outputs of research and development (R&D). "Liquid Metal Reactor Design. Technology Development" is under development in Korea Atomic Energy Research Institute (KAERI) as on of the Mid-Term and Long-Term Nuclear R&D by MOST. To upgrade the productivity of the R&D during long period, system type project have been accomplished within plant period through schedule management by phase, outputs auditing, sharing and constructing database.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.05a
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• pp.369-385
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• 2001

A R&D project evaluation method has been applied for the national nuclear R&D projects in a developing-country setting. In the methodology, Saaty's analytic hierarchy process model is used to evaluate and rank of the selected nuclear R&D project which have a wide range of objectives and characteristics. The criteria used for evaluation related specifically to the Korea's evaluation needs and culture, and they are weighted according to their relative importance as perceived by the evaluator of the R&D project. As a real-world case of evaluation, we elicited and reproduced the evaluation process of the nuclear R&D projects which is going under the research process. As the results of the paper suggests, the methodology can be applied to the evaluation of the R&D projects and has much potential.

• Nuclear Engineering and Technology
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• v.53 no.8
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• pp.2591-2599
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• 2021

The effect of thermal aging at 475 ℃ and 750 ℃ of Z3CN20.09M cast duplex stainless steel (CDSS) on microstructure, mechanical and intergranular corrosion properties were investigated by transmission electron microscope (TEM), nano indenter, scanning electron microscope (SEM) and corrosion fatigue test system. The result indicated that the spinodal decomposition and G precipitated were occurred after aged at 475 ℃, as well as sigma precipitated at 750 ℃. The microstructure degeneration of ferrite was saturated after aged for 2000h and 200 h at 475 ℃ and 750 ℃ respectively. The mechanical properties, intergranular corrosion resistance and corrosion fatigue lives were continuing deteriorated with increasing the aging time at both temperatures. The difference of the degeneration mechanisms of Z3CN20.09M CDSS aged at 475 ℃ and 750 ℃ was analyzed.

• Nuclear Engineering and Technology
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• v.55 no.5
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• pp.1775-1782
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• 2023

Several reactor physics commissioning experiments were conducted to obtain the neutronic parameters at the beginning of the G.A. Siwabessy Multi-purpose Reactor (RSG-GAS) operation. These parameters are essential for the reactor to safety operate. Leveraging the experimental data, this study evaluated the calculated core reactivity, control rod reactivity worth, integral control rod reactivity curve, and fuel reactivity. Calculations were carried out with Serpent 2 code using the latest neutron cross-section data ENDF/B-VIII.0. The criticality calculations were carried out for the RSG-GAS first core up to the third core configuration, which has been done experimentally during these commissioning periods. The excess reactivity for the second and third cores showed a difference of 510.97 pcm and 253.23 pcm to the experiment data. The calculated integral reactivity of the control rod has an error of less than 1.0% compared to the experimental data. The calculated fuel reactivity value is consistent with the measured data, with a maximum error of 2.12%. Therefore, it can be concluded that the RSG-GAS reactor core model is in good agreement to reproduce excess reactivity, control rod worth, and fuel element reactivity.