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김규형 ( Kyu-hyung Kim ),이형봉 ( Hyung-bong Lee ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.1
보통 MCU를 기반으로 하는 임베디드 소프트웨어는 펌웨어 형태로 구현되어 콘솔이 없고, UART는 데이터 송신용으로 사용된다. 그러나 MCU 소프트웨어에 콘솔 드라이버를 구현하면 유닉스ㆍ리눅스와 같은 대화적 표준 입ㆍ출력 개발환경과 타스크 개념을 실현할 수 있다. 이 논문에서는 운영체제 교과에서 익힌 내용을 바탕으로 Atmega2560 MCU에 인터럽트 기반 콘솔 장치 구동기를 구현하고 실험한다.
원자로냉각재펌프 맥동에 대한 APR1400 원자로내부구조물의 진동 및 응력 해석
김규형(Kyu Hyung Kim),고도영(Do Young Ko),김성환(Sung Hwan Kim) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10
The structural integrity of APR1400 reactor vessel internals has been being assessed referring the US Nuclear Regulatory Commission regulatory guide 1.20 comprehensive vibration assessment program. The program is composed of a vibration and stress analysis, a limited vibration measurement, and an inspection. This paper covers the vibration and stress analysis on the reactor vessel internals due to the pulsation of reactor coolant pump. 3-dimensional models to calculate the hydraulic loads and structural responses were built and the pressure distributions and the structural responses were predicted using ANSYS. The peak stress of the reactor vessel internals is much lower than the acceptance limit.
APR1400 원자로 내부배럴집합체 상부판 구조응답해석
김규형(Kyu Hyung Kim),고도영(Do Young Ko),김성환(Sung Hwan Kim) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4
Since the inner barrel assembly of the Advanced Power Reactor 1400 reactor vessel is a new design feature introduced instead of CEA(control element assembly) shroud assembly, the inner barrel assembly can be a significant object of structural integrity assessment. This paper covers the structural responses of top plate, which is a component of the inner barrel assembly, against the deterministic hydraulic load induced by pump pulsation and the random hydraulic load induced by turbulence of coolant. The top plate responds to the deterministic hydraulic load more than to the random hydraulic load and shows enough structural integrity. The results of this paper will be important basis for the selection of instruments and measurement location.
APR1400 원자로내부구조물 종합진동평가프로그램 진동 및 응력해석 방법론 검증
김규형(Kyu Hyung Kim),고도영(Do Young Ko),김성환(Sung Hwan Kim) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.10
The vibration and stress analysis program of comprehensive vibration assessment program (CVAP) is to verify theoretically the structural integrity of reactor vessel internals (RVI) and to provide the basis for selecting the locations monitored in measurement and inspection programs. This paper covers the verification of the vibration and stress analysis methodology of APR1400 RVI CVAP. The analysis methodology was developed to use 3-dimensional hydraulic and structural models with ANSYS and CFX. To validate the methodology, the hydraulic loads and structural reponses of OPR1000 were predicted and compared with the calculated and measured data in the OPR1000 RVI CVAP. Since the results predicted with this methodology were close to the measured values considerably, it was confirmed that the analysis methodology was developed properly.