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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 461 - 468 (8page)
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The improvements of the DeCART/MUSAD code system for uncertainty analysis of HTGR neutronic parameters are presented in this paper. The function for quantifying an uncertainty of critical-spectrumweighted few group cross section was implemented using the generalized adjoint B1 equation solver. Though the changes between the infinite and critical spectra cause a considerable difference in the contribution by the graphite scattering cross section, it does not significantly affect the total uncertainty. To reduce the number of iterations of the generalized adjoint transport equation solver, the generalized adjoint B1 solution was used as the initial value for it and the number of iterations decreased to 50%. To reflect the implicit uncertainty, the correction factor was derived with the resonance integral. Moreover, an additional correction factor for the double heterogeneity was derived with the effective cross section of the DH region and it reduces the difference from the complete uncertainty. The code system was examined with the MHTGR-350 Ex.II-2 3D core benchmark. The keff uncertainty for Ex.II-2awith only the fresh fuel block was similar to that of the block and the uncertainty for Ex.II-2b with the fresh fuel and the burnt fuel blocks was smaller than that of the fresh fuel block
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참고문헌 (15)
참고문헌 신청
T. Y. Han / 2015 / Development of a sensitivity and uncertainty analysis code for high temperature gas-cooled reactor physics based on the generalized perturbation theory / Ann. Nucl. Energy 85:501~511
T. Y. Han / 2017 / Uncertainty analysis with double heterogeneity treatment based on the generalized perturbation theory / Ann. Nucl. Energy 106:111~117
R.L. Childs / 1980 / Generalized Perturbation Theory Using Two-Dimensional, Discrete Ordinates Transport Theory
Yigal Ronen / 1986 / CRC Handbook of Nuclear Reactors Calculations, vol. III / CRC Press
A. Yankov / 2012 / A Two-step Approach to Uncertainty Quantification of Core Simulators / Science and Technology of Nuclear Installations
T. Y. Han / 2017 / Uncertainty analysis with double heterogeneity treatment based on the generalized perturbation theory / Ann. Nucl. Energy 106:111~117
R.L. Childs / 1980 / Generalized Perturbation Theory Using Two-Dimensional, Discrete Ordinates Transport Theory
Yigal Ronen / 1986 / CRC Handbook of Nuclear Reactors Calculations, vol. III / CRC Press
A. Yankov / 2012 / A Two-step Approach to Uncertainty Quantification of Core Simulators / Science and Technology of Nuclear Installations
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