Study of KRUSTY Thermal Expansion Negative Feedback Calculation Based on Unstructured-Mesh MCNP

Wang Lipeng; Cao Lu; Chen Sen; Zhang Xinyi; Jiang Duoyu; Hu Tianliang; Li Da; Chen Lixin; Jiang Xinbiao

doi:10.13832/j.jnpe.2023.06.0045

Volume 44 Issue 6

Dec. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(6): 45-53

Wang Lipeng, Cao Lu, Chen Sen, Zhang Xinyi, Jiang Duoyu, Hu Tianliang, Li Da, Chen Lixin, Jiang Xinbiao. Study of KRUSTY Thermal Expansion Negative Feedback Calculation Based on Unstructured-Mesh MCNP[J]. Nuclear Power Engineering, 2023, 44(6): 45-53. doi: 10.13832/j.jnpe.2023.06.0045

Citation:

Wang Lipeng, Cao Lu, Chen Sen, Zhang Xinyi, Jiang Duoyu, Hu Tianliang, Li Da, Chen Lixin, Jiang Xinbiao. Study of KRUSTY Thermal Expansion Negative Feedback Calculation Based on Unstructured-Mesh MCNP[J]. Nuclear Power Engineering, 2023, 44(6): 45-53. doi: 10.13832/j.jnpe.2023.06.0045

Citation:

Wang Lipeng, Cao Lu, Chen Sen, Zhang Xinyi, Jiang Duoyu, Hu Tianliang, Li Da, Chen Lixin, Jiang Xinbiao. Study of KRUSTY Thermal Expansion Negative Feedback Calculation Based on Unstructured-Mesh MCNP[J]. Nuclear Power Engineering, 2023, 44(6): 45-53. doi: 10.13832/j.jnpe.2023.06.0045

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Study of KRUSTY Thermal Expansion Negative Feedback Calculation Based on Unstructured-Mesh MCNP

doi: 10.13832/j.jnpe.2023.06.0045

Northwest Institute of Nuclear Technology, Xi’an, 710024, China

Received Date: 2022-11-14
Rev Recd Date: 2022-12-27

Available Online: 2023-12-11

Publish Date: 2023-12-15

Abstract

Abstract

Thermal expansion negative feedback simulation of heat pipe reactor KRUSTY has always been a difficulty in calculation. Based on the unstructured mesh ablility of MCNP, the power distribution of KRUSTY unstructured mesh is directly input to ABAQUS, and the thermal mechanical coupling of KRUSTY is carried out by ABAQUS. The thermal deformation simulation, expansion reactivity feedback and density feedback of KRUSTY are studied under the unified unstructured mesh. The difference between non-uniform density and uniform density is studied. The results show that the thermal expansion effect brings more than 900pcm (pcm=10^-5) negative feedback, and the special fuel deformation mainly occurs on the upper and outer edge surface, with a total displacement of about 0.9 cm. The total temperature difference of reactor core is small enough, only about 23 K. Moreover, the neutronics-thermo-mechanics coupling tends to make the core temperature distribution more uniform, and the reactor design can satisfy the single-point failure principle due to the redundant design of the heat pipe. Compared with the traditional CSG geometry, the unstructured-mesh Monte Carlo method can better simulate the thermal expansion effect of metal fuel reactor.
- KRUSTY,
- MCNP,
- Unstructured mesh,
- Neutronics-thermo-mechanics coupling,
- ,

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References(15)

References

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