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Analysis of the fluid-solid-thermal coupling of a pressurizer surge line under ocean conditions
Yu Hang,Zhao Xinwen,Fu Shengwei,Zhu Kang 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.10
To investigate the effects of ocean conditions on the thermal stress and deformation caused by thermal stratification of a pressurizer surge line in a floating nuclear power plant (FNPP), the finite element simulation platform ANSYS Workbench is utilized to conduct the fluid-solid-thermal coupling transient analysis of the surge line under normal “wave-out” condition (no motion) and under ocean conditions (rolling and pitching), generating the transient response characteristics of temperature distribution, thermal stress and thermal deformation inside the surge line. By comparing the calculated results for the three motion conditions, it is found that ocean conditions can significantly improve the thermal stratification phenomenon within the surge line, but may also result in periodic oscillations in the temperature, thermal stress, and thermal deformation of the surge line. Parts of the surge line that are more susceptible to thermal fatigue damage or failure are determined. According to calculation results, the improvements are recommended for pipeline structure to reduce the effects of thermal oscillation caused by ocean conditions. The analysis method used in this study is beneficial for designing and optimizing the pipeline structure of a floating nuclear power plant, as well as for increasing its safety.
A new design concept for ocean nuclear power plants using tension leg platform
Chaemin Lee,Jaemin Kim,Seongpil Cho 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.76 No.3
This paper presents a new design concept for ocean nuclear power plants (ONPPs) using a tension leg platform (TLP). The system-integrated modular advanced reactor, which is one of the successful small modular reactors, is mounted for demonstration. The authors define the design requirements and parameters, modularize and rearrange the nuclear and other facilities, and propose a new total general arrangement. The most fundamental level of design results for the platform and tendon system are provided, and the construction procedure and safety features are discussed. The integrated passive safety system developed for the gravity based structure-type ONPP is also available in the TLP-type ONPP with minor modifications. The safety system fully utilizes the benefits of the ocean environment, and enhances the safety features of the proposed concept. For the verification of the design concept, hydrodynamic analyses are performed using the commercial software ANSYS AQWA with the Pierson-Moskowitz and JONSWAP wave spectra that represent various ocean environments and the results are discussed.
이필승 한국해양환경·에너지학회 2014 한국해양환경공학회 학술대회논문집 Vol.2014 No.5
본 발표에서는 국내외 해양원자력 시스템의 개발현황 및 전망을 설명한다. 우선 해양원자력 시스템을 정의하고 가능한 상품별로 분류한다. 분류된 각각의 상품에 대해 국외 개발 역사 및 현황을 요약하여 설명한다. 특히 원자력 추진선과 부유식 해양원전에 대한 각 나라별 현황을 살펴본다. 선박용 원자로 및 해양원전에 대한 구내의 연구개발 동향을 살펴보고, 마지막으로 결론에서 전체 발표내용을 요약하고 시사점을 도출한다.
최순,김지호,김교윤 한국해양환경·에너지학회 2014 한국해양환경공학회 학술대회논문집 Vol.2014 No.5
본 연구에서는 송형 경수로(원자로시스템)를 해양에서 에너지원으로 활용하기 위한 여러 현안 및 기술의 미래 전망을 기술한다. 우선 세계 각국에서 개발 중인 소형원자로의 특징을 기술하고, 그동안 해양에서의 원자력 활용사례를 정리하며 해양원자로의 개발요건을 제시한다. 아울러 원자로시스템과 조선해양기술의 융합으로 생겨나는 해양원자력시스템의 미래에 대한 전망을 피력한다.