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하나로 비상보충수의 노심 주입유량 시험 결과에 대한 고찰
박용철(Yong-Chul Park),이용섭(Yong-Sub Lee),최영산(Young-San Choi),정환성(Hoan-Sung Jung),임인철(In-Cheol Lim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
When the water level of the reactor pool descends to an extremely low level due to a loss of reactor pool water accident in HANARO, a multi-purpose research reactor of a 30 MWth, the emergency water stored in the tank should be fed to the core by a gravity force. Last year, the reactor pool water was temporarily transferred to the emergency cooling water storage tank. And the water level came down to EL 77.5 m, 0.4 m above the extremely low level to install the in-pile section of a Fuel Test Loop in the reactor core. When the water was re-transferred into the reactor pool, an emergency water injection test was performed. This paper describes the test results and a consideration of the results. It was confirmed through the test that the injection flow rate was maintained above the design injection flow rate by setting the flow control valve at 3.5 turns to a partially open position.
하나로 안전성 관련계통의 가압부품에 대한 기계적 구조적 건전성
박용철(Young-Chul Park),이용섭(Young-Sub Lee),정환성(Hwan-Sung Jung),임인철(In-Chul Lim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
HANARO, an open-tank-in-pool type research reactor of 30 MWth power in Korea, has been operating normally since its initial criticality in February, 1995. For the last ten years, HANARO has verified the mechanical and structural integrities of the pressure retaining components of the safety related systems and the integral attachments of the supports and restraints of the components within a specified boundary through ten years periodic in-service inspections in accordance with Article IWD in ASME SEC. XI and Notice 2004-13 (Jul. 2nd, 2004) of the minister of Korea Ministry of Science and Technology. From the results, it was confirmed through the ISI that the pressure retaining components and parts were stable to within the specified boundaries for their mechanical and structural integrities.
박용철(Young-Chul Park),이용섭(Young-Sub Lee),김양곤,정환성(Hoan-Sung Jung),임인철(In-Chul Lim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
HANARO, an open-tank-in-pool type research reactor of 30 MWth power in Korea, has been operating normally since its initial criticality in February, 1995. For the last about ten years, A cooling tower of a secondary cooling system has been operated normally in HANARO. Last year, the cooling tower has been overhauled for preservative maintenance including fills, eliminators, wood support, water distribution system, motors, driving shafts, gear reducers, basements, blades and etc. This paper describes the results of the overhaul. As results, it is confirmed that the cooling tower maintains a good operability through a filed test. And a cooling capability will be tested when a wet bulb temperature is maintained about 28 ℃ in summer and the reactor is operated with the full power.
Measurement of Two-Phase Flow with a High Frame-Rate Dynamic Neutron Radiography in HANARO Reactor
Jae-Eun Cha(차재은),In-Cheol Lim(임인철),Chul-Muu Sim(심철무),Hee-Ryoung Kim(김희령),Byung-Ho Kim(김병호) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
A dynamic neutron radiography(DNR) has a complementary characteristics to X-ray radiography and is suitable for a visualization and measurement of a multi-phase flow research in a metallic duct and a liquid metal flow. Two kinds of experiments were conducted to visualize the water-air two-phase flow and the liquid-metal two-phase flow. The void fraction and the two-phase flow patterns in a channel simulating the HANARO fuel channel were investigated in the D₂O-air two-phase condition. The DNR technique was also applied to visualize the flow field in the gas-liquid metal two-phase flow with the HANARO-beam facility. The two-phase flow images were taken at various combinations of the liquid flow and gas flow with a high frame-rate neutron radiography at 1000 fps. The study showed that the dynamic neutron radiography is a good technique to measure the two-phase flow behavior in the complex rod-bundle geometry and the liquid-metal two-phase flow.
차재은(Jae-Eun Cha),임인철(In-Cheol Lim),심철무(Chul-Muu Sim),김병호(Byung-Ho Kim),이태호(Tae-Ho Lee),사이토(Yasushi Saito) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
The flow-field of a liquid-metal system is very important for the safety analysis and the design of the steam generator of liquid-metal fast breeder reactor. Dynamic neutron radiography (DNR) is suitable for a visualization and measurement of a liquid metal flow and a two-phase flow in a metallic duct. However, the three dimensional DNR techniques is not enough to obtain the velocity information in the wide channel up to now. In this research, a high speed DNR technique was applied to visualize the heavy liquid-metal flow field in the narrow channel with the HANARO-beam facility. The images were taken with a high frame-rate neutron radiography at 250 fps and analyzed with a Particle Image Velocimetry(PIV) method. The images were compared with the results of the commercial CFX code to study the feasibility of DNR technique for the measuring the heavy liquid-metal flow field. The PIV images could discern the turbulent vortex flow in the two-dimensional narrow channel.
정재조(Jae-Jo Jung),이일주(Il-Ju Lee),한정우(Jung-Woo Han),김문덕(Mun-Deok Kim),최재선(Jae-Seon Choi),김성엽(Seong-Yeop Kim),이봉규(Bong-Kyu Lee),이철원(Chul-Won Lee),임인철(In-Chil Lim) 한국정보과학회 1994 한국정보과학회 학술발표논문집 Vol.21 No.2A
본 논문에서는 일반적인 음성합성기술에서 음성합성방식에 대한 종류 및 기능과 그에 대한 특성, 음성 부호와 방식중 PCM방식에 대한 과정 성능, 합성음 제작 방법중 용도별 분류 및 화자의 선택과 편집 방법 및 분석 테이프 제작 방법, 음성합성의 응용 및 기대효과에 관하여 제시한다. 그리고 다수의 이용자에게 일정한 내용을 동시에 많은 이용자에 정보검색 서비스의 자동안내 가능한 합성음 장치 및 자동안내 서비스에 관련된 하드웨어 및 소프트웨어에 관하여 제시 한다. 성능분석으로서 정보검색 서비스의 자동안내를 실시한 경우에 동일한 시설과 검색원으로 자동안내시간 7초 단축으로 10만~170만 이용자에 대해 21~36 평균처리건수 증가에 대해 처리 효과를 얻을 수 있고 이용자수는 21만~40만 이용자의 증가에 대해 처리 효과를 얻을 수 있다. 합성음장치 채널수는 2회 안내방송을 하고 7초의 안내시간을 실시하면 검색자 수의 약 70% 만 채널수 수용으로 검색원이 자동안내 요구시 합성음 안내 성공의 확률이 1(100%)이 되어 모든 검색원이 합성음 요구에 성공하게 되어 더 이상의 채널 증가는 이용자에 영향을 주지 못함을 확인할 수 있다.