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APPLICATION OF A GENETIC ALGORITHM FOR THE OPTIMIZATION OF ENRICHMENT ZONING AND GADOLINIA FUEL (UO2/Gd2O3) ROD DESIGNS IN OPR1000s

Title
APPLICATION OF A GENETIC ALGORITHM FOR THE OPTIMIZATION OF ENRICHMENT ZONING AND GADOLINIA FUEL (UO2/Gd2O3) ROD DESIGNS IN OPR1000s
Other Titles
Gd2O3) ROD DESIGNS IN OPR1000s
Author
김종경
Keywords
Enrichment zoning; Gadolinia; Genetic algorithm; Optimization; PLUS7; Power peaking
Issue Date
2012-04
Publisher
한국원자력학회 / Korean Nuclear Society
Citation
Nuclear Engineering and Technology, 2012, 44(3), P.273-282, 10P.
Abstract
A new effective methodology for optimizing the enrichment of low-enriched zones as well as gadolinia fuel (UO2/Gd2O3)rod designs in PLUS7 fuel assemblies was developed to minimize the maximum peak power in the core and to maximize the cycle lifetime. An automated link code was developed to integrate the genetic algorithm (GA) and the core design code package of ALPHA/PHOENIX-P/ANC and to generate and evaluate the candidates to be optimized efficiently through the integrated code package. This study introduces an optimization technique for the optimization of gadolinia fuel rod designs in order to effectively reduce the peak powers for a few hot assemblies simultaneously during the cycle. Coupled with the gadolinia optimization, the optimum enrichments were determined using the same automated code package. Applying this technique to the reference core of Ulchin Unit 4 Cycle 11, the gadolinia fuel rods in each hot assembly were optimized to different numbers and positions from their original designs, and the maximum peak power was decreased by 2.5%, while the independent optimization technique showed a decrease of 1.6% for the same fuel assembly. The lower enrichments at the fuel rods adjacent to the corner gap (CG), guide tube (GT), and instrumentation tube (IT) were optimized from the current 4.1, 4.1, 4.1 w/o to 4.65,4.2, 4.2 w/o. The increase in the cycle lifetime achieved through this methodology was 5 effective full-power days (EFPD) on an ideal equilibrium cycle basis while keeping the peak power as low as 2.3% compared with the original design.
URI
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OJRHBJ_2012_v44n3_273http://hdl.handle.net/20.500.11754/48998
ISSN
1738-5733; 1225-9292
DOI
10.5516/NET.01.2011.047
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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