Accurate nuclear cross-section sensitivity-coefficient evaluation is important for sensitivity and uncertainty analysis, similarity analysis, cross-section adjustment et al. A cross-section perturbation will affect the lattice-physics calculation results through the transport calculation directly and through the resonance calculation indirectly. The indirect effect was found to be important in some cases in the previous studies. To quantify the indirect effect on the lattice-physics calculation results for subgroup resonance calculation method, a sensitivity and uncertainty analysis code COLEUS was developed based the GPT-based method. The eigenvalue sensitivity to non-resonance nuclide cross sections was investigated. Numerical results show that in the traditional LWR, the sensitivity coefficients will be overestimated if implicit sensitivity is neglected. And in the BWR, the implicit sensitivity will become more important along with the temperature rise. But if resonance fission and resonance capture play a coequal role or the background cross section is big, the implicit sensitivity can be small.
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2016 24th International Conference on Nuclear Engineering
June 26–30, 2016
Charlotte, North Carolina, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5001-5
PROCEEDINGS PAPER
Eigenvalue Implicit Sensitivity Calculation and Analysis for Lattice-Physics Calculation
Yong Liu,
Yong Liu
Xi’an Jiaotong University, Xi’an, China
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Liangzhi Cao,
Liangzhi Cao
Xi’an Jiaotong University, Xi’an, China
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Hongchun Wu,
Hongchun Wu
Xi’an Jiaotong University, Xi’an, China
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Tiejun Zu,
Tiejun Zu
Xi’an Jiaotong University, Xi’an, China
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Qingming He
Qingming He
Xi’an Jiaotong University, Xi’an, China
Search for other works by this author on:
Yong Liu
Xi’an Jiaotong University, Xi’an, China
Liangzhi Cao
Xi’an Jiaotong University, Xi’an, China
Hongchun Wu
Xi’an Jiaotong University, Xi’an, China
Tiejun Zu
Xi’an Jiaotong University, Xi’an, China
Qingming He
Xi’an Jiaotong University, Xi’an, China
Paper No:
ICONE24-60401, V001T02A019; 8 pages
Published Online:
October 25, 2016
Citation
Liu, Y, Cao, L, Wu, H, Zu, T, & He, Q. "Eigenvalue Implicit Sensitivity Calculation and Analysis for Lattice-Physics Calculation." Proceedings of the 2016 24th International Conference on Nuclear Engineering. Charlotte, North Carolina, USA. June 26–30, 2016. V001T02A019. ASME. https://doi.org/10.1115/ICONE24-60401
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