DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Yonghee | - |
dc.contributor.advisor | 김용희 | - |
dc.contributor.author | Nguyen, Xuan Ha | - |
dc.date.accessioned | 2017-03-29T02:36:09Z | - |
dc.date.available | 2017-03-29T02:36:09Z | - |
dc.date.issued | 2016 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=663409&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/221624 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 원자력및양자공학과, 2016.8 ,[iv, 64 p. :] | - |
dc.description.abstract | For a more accurate nuclear reactor design, more-detailed reactor analysis procedures are under development to replace the conventional assembly-based nodal methods. One such methodology is the pin-by-pin core calculation method, which directly provides reasonably accurate intra-assembly pin-wise average information. As such, there is actually need to obtain a higher level of details in the reactor design to couple with the pin-wise calculation. This research specifically investigates a novel intra-pin reconstruction procedure to obtain detailed power profile within a fuel rod. In this study, the intra-pin reconstruction process is based on the well-established form function method, which is a standard pin-power reconstruction method in the current coarse-mesh nodal analysis. The form function method assumes that heterogeneous intra-pin information can be approximated by the product of global homogeneous distribution and local heterogeneous one. The local form function is pre-generated as section-wise factors from a single fuel pin calculation with all reflective boundary condition. In this work, the heterogeneous form function for a single fuel lattice is determined by dividing a fuel region into 40 equi-volume small regions for detailed intra-pin power profile. The intra-pin homogeneous power distributions are approximated by using the analytical solution of the 2-gorup neutron diffusion equation with pin-wise boundary constraints. Four types of constraints are considered in this study to determine the homogeneous power shapes, which are surface-average flux, surface-average net current, corner point flux, and the volume-average cell flux. And six different combinations of the boundary constraints are separately evaluated for the homogeneous power profile. To investigate feasibility of the intra-pin reconstruction methods, all necessary information including form functions, homogenized group constants, reference power, and pin boundary constraints are obtained from a high-fidelity Monte Carlo calculation. It is demonstrated that intra-pin power can be retrieved with a reasonable accuracy even in a rodded condition. In addition, an error sensitivity analysis is also performed to assess the actual feasibility of the proposed methods when it is coupled with a pin-wise calculation | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Intra-pin power reconstruction | - |
dc.subject | pin-wise reactor analysis | - |
dc.subject | form function method | - |
dc.subject | 2-group diffusion approximation | - |
dc.subject | analytic functions expansion | - |
dc.subject | 격자출력 재구성 방법 | - |
dc.subject | 핀단위 원자로 해석 | - |
dc.subject | 모양함수 방법론 | - |
dc.subject | 2군 확산 근사 | - |
dc.subject | 해석함수 전개 노달방법 | - |
dc.title | (A) study on reconstruction of intra-pin information in pin-wise reactor analysis | - |
dc.title.alternative | 격자단위 정보에 기초한 연료봉 내부 상세한 출력분포 재구성 방법론 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :원자력및양자공학과, | - |
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