Uncertainty research of fuel rod design verification based on Dakota

Duoting Xu; Xin Jin; Xiaoyan Wei; Xiaohan Liu; Yanan Zhu

doi:10.11884/HPLPB202234.210298

Journals >High Power Laser and Particle Beams >Volume 34 >Issue 2 >Page 026012 > Article

High Power Laser and Particle Beams
Vol. 34, Issue 2, 026012 (2022)

Uncertainty research of fuel rod design verification based on Dakota

Duoting Xu, Xin Jin, Xiaoyan Wei, Xiaohan Liu, and Yanan Zhu

Author Affiliations

China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518026, China

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DOI: 10.11884/HPLPB202234.210298 Cite this Article

Duoting Xu, Xin Jin, Xiaoyan Wei, Xiaohan Liu, Yanan Zhu. Uncertainty research of fuel rod design verification based on Dakota[J]. High Power Laser and Particle Beams, 2022, 34(2): 026012 Copy Citation Text

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Fig. 1. Calculation flow of fuel rod performance analysis software

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Fig. 2. Coupling relationship between Dakota and fuel rod performance analysis software

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Fig. 3. Sampling frequency determination process

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Fig. 4. Sampling results

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Fig. 5. Results of fuel rod design verification by MC sampling and LHS

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item	partial correlation coefficient
	fuel rod pressure		pellet temperature		cladding corrosion		cladding strain change
	MC	LHS	MC	LHS	MC	LHS	MC	LHS
fuel OD	−0.957	−0.961	−0.365	−0.348	0.054	0.090	0.291	0.253
fuel porosity	0.996	0.996	0.999	0.999	0.059	0.019	0.403	0.411
cladding OD	0.071	0.015	0.025	0.040	−0.403	−0.104	0.022	−0.040
cladding ID	0.185	0.018	−0.013	−0.037	0.053	0.040	−0.035	0.037
plenum length	−0.262	−0.041	0.028	−0.024	−0.025	0.036	0.024	−0.001
²³⁵U enrichment	0.120	0.083	0.407	0.462	0.096	0.007	−0.037	0.013
fuel column length	0.034	−0.004	0.030	−0.024	−0.053	0.029	0.024	−0.001
fuel conductivity	−	−	−0.999	−0.999	−0.024	−0.041	−0.419	−0.415
density change by resintering	−0.987	−0.987	−0.996	−0.996	−0.053	−0.056	−0.422	−0.466
cladding corrosion model	0.458	0.459	0.646	0.690	1.000	1.000	−0.022	0.067
fuel solid swell model	0.240	0.177	−0.294	−0.323	0.033	−0.003	0.116	0.102
cladding creep model	−0.367	−0.450	−0.017	0.038	0.055	0.016	0.366	0.351

Table 1. Partial correlation between input and output

Duoting Xu, Xin Jin, Xiaoyan Wei, Xiaohan Liu, Yanan Zhu. Uncertainty research of fuel rod design verification based on Dakota[J]. High Power Laser and Particle Beams, 2022, 34(2): 026012

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