Study on the influence of geometric size of annular fuel element on thermal performance

Fig. 7. Influence of internal cladding thickness on fuel element thermal performance (a) Adiabatic surface location, (b) Highest temperature pellet, (c) Outlet temperature of the coolant

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Fig. 8. Influence of outer cladding thickness on fuel element thermal performance (a) Adiabatic surface location, (b) Highest temperature pellet, (c) Outlet temperature of the coolant

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Fig. 9. Influence of the internal air gap distance on fuel element thermal performance (a) Adiabatic surface location, (b) Highest temperature pellet, (c) Outlet temperature of the coolant

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Fig. 10. The influence of the outer air gap distance on fuel element thermal performance (a) Adiabatic surface location, (b) The highest temperature pellet, (c) The outlet temperature of the coolant

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Fig. 11. Influence of the The pellet thickness on fuel element thermal performance(a) Adiabatic surface location, (b) Highest temperature pellet, (c) Outlet temperature of the coolant

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Table 1. Annular fuel element parameter

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Table 1. Annular fuel element parameter

参数Parameter

设计值Design value

热功率Thermal power / $M W$

总质量流量The total mass flow rate / $k g ∙ s^{- 1}$

芯块长度The length of the pellet / $m$

冷却剂入口温度The coolant inlet temperature / $℃$

栅距Lattice spacing / $c m$

内外包壳厚度Inside and outside the cladding thickness / $c m$

内外气隙厚度Inside and outside the air-gap thickness / $c m$

芯块厚度The thickness of the pellet / $c m$

包壳材料Cladding material

冷却剂材料Coolant material

芯块材料Core block material

100

102

3.5

400

1.39

0.06

0.035

0.1

T91

LBE

UO₂

Table 2. Liquid lead bismuth physical relationship

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Table 2. Liquid lead bismuth physical relationship

名称Name

关系式Relationship formula

导热系数Coefficient of thermal conductivity / $W ∙ m^{- 1} ∙ K^{- 1}$

定压比热容The specific heat at constant pressure / $J ∙ k g^{- 1} ∙ K^{- 1}$

密度Density / $k g ∙ m^{- 3}$

动力粘度Dynamic viscosity / $N ∙ s ∙ m^{- 2}$

$λ = 3.284 + 1.167 \times 10^{- 2} T - 2.305 \times 10^{- 6} T^{2}$

$c_{p} = 176.2 - 4.923 T + 1.25 \times 10^{- 5} T^{2} - 4.56 \times 10^{5} T^{- 2}$

$ρ = 11 065 - 1.294 T$

$μ = 4.84 \times 10^{- 4} e x p (\frac{745.1}{T})$

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Zhaocai XIANG, Fulin ZENG, Pengcheng ZHAO. Study on the influence of geometric size of annular fuel element on thermal performance[J]. NUCLEAR TECHNIQUES, 2023, 46(1): 010602

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Paper Information

Category: Research Articles

Received: Aug. 16, 2022

Accepted: --

Published Online: Feb. 17, 2023

The Author Email: Pengcheng ZHAO (zhaopengcheng1030@163.com)

DOI:10.11889/j.0253-3219.2023.hjs.46.010602

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology