• TTA Journal
• /
• s.134
• /
• pp.20-21
• /
• 2011

온 지구촌이 '스마트' 열풍이다. 스마트 TV, 스마트폰, 스마트 자동차 등등. 여기에 스마트의 또 다른 프로젝트가 하나 더 있으니, 바로 스마트 소형 원자로 개발이다. 2009년 말 우리나라는 처음으로 UAE(아랍에미리트)에서 400억 달러 규모의 원자력발전 플랜트 수주에 성공하면서 원자력 르네상스 시대를 맞이했다. 하지만 UAE에 건설되는 대형 용량(기당 150만kW)의 원자로는 웬만한 국가의 전력 규모로는 수용하기 힘든 용량이다. 따라서 소형 원자로가 원자력 르네상스 시대의 또 다른 대안으로 떠올랐다. 그것이 바로 스마트 원자로이다.

• Journal of the KSME
• /
• v.51 no.7
• /
• pp.35-39
• /
• 2011

이 글에서 중소형 원자로인 스마트 원자로의 표준설계인가를 받기 위하여 수행한 기계 기술검증시험, 원자로 계통의 안전성 평가에 필요한 자료를 생산하기 위하여 수행한 시험, 그리고 기술현안 사항을 해결한 시험에 대하여 소개하고자 한다.

• JOURNAL OF ELECTRICAL WORLD
• /
• s.402
• /
• pp.23-27
• /
• 2010

• Nuclear industry
• /
• v.36 no.1
• /
• pp.50-52
• /
• 2016

• The Science & Technology
• /
• no.3 s.466
• /
• pp.12-15
• /
• 2008

"차세대 먹거리를 원자력 수출에서도 찾을 수 있을 정도로 우리 나라의 원자력 기술은 탄탄합니다. 발전과 해수담수화 겸용 스마트 원자로를 비롯한 연구용 원자로의 수출 전망도 밝아요." 한국원자력연구원 신임 양명승 원장은 "이제 한국의 원자력도 세계를 무대로 뛰어야 할 때"라며 "그동안 한국원자력연구원이 중장기 기술만 주로 개발하느라 연구성과가 제대로 알려지지 않은 점을 고려해 앞으로는 현장의 애로기술과 신기술 개발에도 적절히 연구력을 배분하겠다"고 강조했다. 그는 지난해 11월 28일 취임 이후 지금까지 마련한 한국원자력연구원 발전 구상을 밝혔다.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.34 no.8
• /
• pp.1059-1065
• /
• 2010

An analysis was conducted to predict the hydraulic performance of a reactor coolant pump (RCP) of SMART at the off-design as well as design points. In order to reduce the analysis time efficiently, a single passage containing an impeller and a diffuser was considered as the computational domain. A stage scheme was used to perform a circumferential averaging of the flux on the impeller-diffuser interface. The pressure difference between the inlet and outlet of the pump was determined and was used to compute the head, efficiency, and break horse power (BHP) of a scaled-down model under conditions of steady-state incompressible flow. The predicted curves of the hydraulic performance of an RCP were similar to the typical characteristic curves of a conventional mixed-flow pump. The complex internal fluid flow of a pump, including the internal recirculation loss due to reverse flow, was observed at a low flow rate.

• The KSFM Journal of Fluid Machinery
• /
• v.15 no.4
• /
• pp.5-11
• /
• 2012

To identify the flow characteristics of the SMART reactor, a flow distribution model test and a numerical simulation are performed in KAERI. Among several part of the SMART reactor, the fuel assemblies are simulated using simulators because of the complexity. The geometries of the core in the SMART reactor and simulator are different, but some similarities are maintained such as the ratio of pressure drop in the vertical and cross directions. There are cross flow holes in each core simulator to reproduce the cross flow of SMART fuel assemblies. To know the flow characteristics of the cross flow, numerical analysis is performed. As the cross flow area is decreased, the pressure drop between inlet and outlet is decreased. Also, when the flow imbalance between two core simulators is constant, the cross flow area does not significantly affect the cross flow.

• Nuclear industry
• /
• v.37 no.11
• /
• pp.30-38
• /
• 2017

완전 통합 디지털 계측제어 시스템을 갖춘 APR1400 신형경수로 초호기 신고리 3호기가 지난해 연말부터 가동되고 있다. 본고는 이 최첨단 원자로의 종합 계측제어 시스템을 상세히 설명하고 있다. 지금 세계의 많은 원전들은 디지털 계측제어 시스템의 확보를 위해 확실하고, 효율적이며, 무엇보다 안전한 기술 혁신을 추구하는데 매진하고 있다. 기술이 밀집되어 복잡하지 않고, 모듈 방식의 개인별 계기반과 전산화된 공정, 그리고 스마트 경보 발령 시스템 등을 갖춘 첨단 제어실은 더욱 간편하고 안전한 업무 환경을 제공해 주고 있다. 신고리 3,4호기의 성공 사례를 통해서 독립형 계측제어 시스템을 성공적으로 통합시킬 수 있는 혁신적인 방법이 확인됨으로써 이제는 종합 디지털 계측제어 시스템을 적시에, 안전하고, 경제적으로 실용화할 수 있다는 것을 보여주고 있는 것이다.

• Journal of Information Technology Services
• /
• v.20 no.3
• /
• pp.1-12
• /
• 2021

Reactor Coolant Pump (RCP) is core part of nuclear power plant to provide the forced circulation of reactor coolant for the removal of core heat. Properly monitoring vibration of RCP is a key activity of a successful predictive maintenance and can lead to a decrease in failure, optimization of machine performance, and a reduction of repair and maintenance costs. Here, we developed real-time RCP Vibration Analysis System (VAS) that web based platform using NoSQL DB (Mongo DB) to handle vibration data of RCP. In this paper, we explain how to implement digital signal process of vibration data from time domain to frequency domain using Fast Fourier transform and how to design NoSQL DB structure, how to implement web service using Java spring framework, JavaScript, High-Chart. We have implement various plot according to standard of the American Society of Mechanical Engineers (ASME) and it can show on web browser based on HTML 5. This data analysis platform shows a upgraded method to real-time analyze vibration data and easily uses without specialist. Furthermore to get better precision we have plan apply to additional machine learning technology.

• Journal of Energy Engineering
• /
• v.25 no.4
• /
• pp.124-132
• /
• 2016

In order to estimate the effect of flow distributors connected to an upper nozzle of CMT(Core Makeup Tank) on the thermal-hydraulic characteristics in the tank, a simplified 2 inch Small Break Loss of Coolant Accident(SBLOCA) was simulated by skipping the decay power and Passive Residual Heat Removal System(PRHRS) actuation. The CMT is a part of safety injection systems in the SMART (System Integrated Modular Advanced Reactor). Each test was performed with reliable boundary conditions. It means that the pressure distribution is provided with repeatable and reproducible behavior during SBLOCA simulations. The maximum flow rates were achieved at around 350 seconds after the initial opening of the isolation valve installed in CMT. After a short period of decreased flow rate, it attained a steady injection flow rate after about 1,250 seconds. This unstable injection period of the CMT coolant is due to the condensation of steam injected into the upper part of CMT. The steady injection flow rate was about 8.4% higher with B-type distributor than that with A-type distributor. The gravity injection during hot condition tests were in good agreement with that during cold condition tests except for the early stages.