On the Reconstruction of Pointwise Power Distributions in a Fuel Assembly From Coarse-Mesh Nodal Calculations 노달계산결과로부터 핵연료 집합체내의 출력분포를 재생하는 방법에 관하여

This paper is a study on an accurate and computationally efficient method for reconstructing pointwise power distributions from coarse-mesh nodal calculations. The modern nodal codes can calculate global reactor power shapes and criticality very efficiently and accurately. But inherent in the nodal procedures, there is inevitable loss of information on local heterogeneous quantities. In this study, an improved form function method which reflects the exponential transition of the thermal flux near the assembly surface is developed for the reconstruction of the heterogeneous fluxes. Use of the new form function method in several pressurized water reactor (PWR) benchmark problems reduces the maximum errors in the reconstructed thermal flux to those in the reconstructed fast flux. Even for assemblies adjacent to the steel baffle in realistic PWR cores, use of this method also results in improved pointwise power reconstruction.
Publisher
한국원자력학회
Issue Date
1988-09
Language
ENG
Citation

NUCLEAR ENGINEERING AND TECHNOLOGY, v.20, no.3, pp.145 - 154

ISSN
1738-5733
URI
http://hdl.handle.net/10203/7154
Appears in Collection
NE-Journal Papers(저널논문)
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