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논문 기본 정보

자료유형
학술대회자료
저자정보
Fahmi Alfa Muslimu (KINGS) Ihn NAMGUNG (KEPCO International Nuclear Graduate)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2018년도 학술대회
발행연도
2018.12
수록면
1,148 - 1,153 (6page)

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초록· 키워드

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The reactor scram is a sudden shutdown of a nuclear reactor by rapid insertion of the Control Element Assembly (CEA) rods into the reactor core in order to stop the fission reaction. The CEA rods drop to the reactor core within the guide tubes by the gravity. For APR 1400, the CEA drop time is less than 4 seconds to meet the reactor physical requirement of emergency reactor shut-down condition in order to prevent run-away fission reaction in the core. The aim of this study is to investigate theoretical minimum mass for the control rod that can make it fully inserted into the guide tube within the required time without failure. The control rod drop time computed using simulation and compared with available data from operational results of APR1400. The 2D axisymmetric model was constructed to simulate the drop motion using dynamic mesh layering technique in Computational Fluid Dynamic (CFD) ANSYS Fluent 19.1. Design parameter such as control rod geometry, guide tube geometry, operating pressure, and core average velocity was adopted from APR1400 and used for simulation. The simulation has shown that when the control rod mass is less than 10.32 kg under the same design geometry it cannot be fully inserted to the guide tube. The 12 finger full strength has been established to drop slower than 4 finger full strength and 4 finger part strength.

목차

Abstract
1. Introduction
2. Theoretical Consideration
3. CFD Simulation Model
4. Result and Discussion
5. Conclusion
References

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