Validation of a nuclear code system for prismatic high temperature gas-cooled reactors based on the Very High Temperature Reactor Critical Assembly benchmark

Yuan Yuan; Chenglong Zhang; Guoming Liu; Shuhong Du; Xiaodong Huo; Zhiyuan Feng; Xia’nan Du

doi:10.11884/HPLPB202234.210362

Journals >High Power Laser and Particle Beams >Volume 34 >Issue 2 >Page 026017 > Article

High Power Laser and Particle Beams
Vol. 34, Issue 2, 026017 (2022)

Validation of a nuclear code system for prismatic high temperature gas-cooled reactors based on the Very High Temperature Reactor Critical Assembly benchmark

Yuan Yuan¹, Chenglong Zhang¹, Guoming Liu^1、*, Shuhong Du¹, Xiaodong Huo¹, Zhiyuan Feng², and Xia’nan Du³

Author Affiliations

¹China Nuclear Power Engineering Co., Ltd, Beijing 100840, China

²Department of Engineering Physics, Tsinghua University, Beijing 100084, China

³School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China

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DOI: 10.11884/HPLPB202234.210362 Cite this Article

Yuan Yuan, Chenglong Zhang, Guoming Liu, Shuhong Du, Xiaodong Huo, Zhiyuan Feng, Xia’nan Du. Validation of a nuclear code system for prismatic high temperature gas-cooled reactors based on the Very High Temperature Reactor Critical Assembly benchmark[J]. High Power Laser and Particle Beams, 2022, 34(2): 026017 Copy Citation Text

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Fig. 1. VHTRC HP core cross sections

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Fig. 2. VHTRC HP core cross sections after modification

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Fig. 3. k_eff in SPH iteration process

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density adjustment factor	k_eff	standard deviation	$\Delta {k}_{ {\rm{eff} }\text{} }$/10⁻⁵
original	1.00871	0.00026	0
0.5	1.00765	0.00027	−106
0.6	1.00877	0.00024	6
0.65	1.01031	0.00024	160

Table 1. k_eff results of different density adjustment cases

case	k_eff	standard deviation	$\Delta {k}_{{\rm{eff}}}$/10⁻⁵
CE	1.00927	0.00011
MG-4g	1.02818	0.00009	1891
MG-8g	1.02476	0.00011	1549
MG-16g	1.02391	0.00011	1464
MG-25g	1.01844	0.00010	917
MG-40g	1.01786	0.00011	859
MG-70g	1.01661	0.00009	734

Table 2. k_eff of different energy group structure cases

No.	relative error/%
No.	case 1	case 2
1	0.09	0.10
2	−0.53	−0.54
3	1.40	0.08
4	0.09	0.47
5	−0.20	−0.04
6	0.52	0.38
7	−0.34	−0.05
8	−0.34	−0.12
9	0.18	0.07
10	−0.38	−0.18
11	−0.48	−0.33
12	0.20	0.12
13	0.19	0.16

Table 3. Power discrepancy of different zoning cases

	k_eff	standard deviation
case 1	1.00843	0.00010
case 2	1.00951	0.00008

Table 4. k_eff of different zoning cases

T/K	k_eff
T/K	benchmark	MVP-II	RMC-CE	SaraGR
298.65	1.0115±0.0032	1.00706±0.00006	1.00927±0.00011	1.00981
344.35	1.0046±0.0033	0.99998±0.00006	1.00263±0.00010	1.00219
374.05	0.9994±0.0035	0.99527±0.00006	0.99778±0.00011	0.99713
423.65	0.9906±0.0035	0.98700±0.00006	0.98925±0.00010	0.98823
472.75	0.9820±0.0037	0.97893±0.00006	0.98140±0.00011	0.97957

Table 5. k_effof different temperature cases

T/K	k_eff		$\Delta {k}_{{\rm{eff}}}$/(10⁻⁵)
T/K	RMC-CE	SaraGR-Interp	$\Delta {k}_{{\rm{eff}}}$/(10⁻⁵)
298.65	1.00927±0.00011	1.00982	55
344.35	1.00263±0.00010	1.00138	−125
374.05	0.99778±0.00011	0.99642	−136
400.00	0.99321±0.00011	0.99234	−87
423.65	0.98925±0.00010	0.98787	−138
472.75	0.98140±0.00011	0.97930	−210
500.00	0.97677±0.00011	0.97491	−186

Table 6. Results with interpolation of cross sections

case	$ {\mathrm{\alpha }}_{\mathrm{T}} $/(10⁻⁵·K⁻¹)
benchmark	−17.1
MVP-II	−16.4
RMC-CE	−16.2
SaraGR	−17.6
SaraGR-Interp	−17.7

Table 7. Isothermal reactivity coefficient

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