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 应用科技  2019, Vol. 46 Issue (2): 116-121  DOI: 10.11991/yykj.201804014 0

### 引用本文

PENG Guannan, KUANG Bo, WANG Xin, et al. Performance analysis of a moving body in passive shutdown subassembly for sodium cooled fast reactor[J]. Applied Science and Technology, 2019, 46(2), 116-121. DOI: 10.11991/yykj.201804014.

### 文章历史

Performance analysis of a moving body in passive shutdown subassembly for sodium cooled fast reactor
PENG Guannan, KUANG Bo, WANG Xin, LIU Pengfei, YUAN Haoran
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract: In order to study the influence of the structure of passive shutdown subassembly on the moving body in a sodium cooled fast reactor (SFR), then apply the study result to guide the structural design of passive shutdown subassembly, we first analyzed the hydrodynamics and kinematics of the moving body in the hydraulic-suspended passive shutdown assembly of sodium cooled fast reactor, then designed and developed a hydrodynamic analysis code, namely PSSD, for calculating the falling performance of the moving body of passive shutdown subassembly. With the code, we made sensitivity calculation and analysis on the influence of various key dimensional sizes of the assembly, including those of the moving body on the rod-falling performance, expecting to provide a reference for the design and optimization of the passive shutdown assembly structure.
Keywords: sodium cooled fast reactor    passive shutdown subassembly    sensitivity analysis    passive safety    quasi-steady state analysis    numerical simulation    sports characteristics    control rod

1 PSS原理及移动体受力分析

2 移动体运动模型及计算

 $\left\{ \begin{array}{l} ma = {F_g} - {F_b} - {F_{{\rm{DR}}}}\\ x = {u_0}t + \displaystyle\frac{1}{2}a{t^2} \end{array} \right.$ (1)

 ${F_{{\rm{DR}}}} = {S_e}\Delta P$

 $\left\{ {\begin{array}{*{20}{c}} {{Q_1} - {Q_2} - {Q_5} = 0}\\ {\begin{array}{*{20}{c}} {\begin{array}{*{20}{c}} {{Q_2} + {Q_6} - {Q_3} = 0}\\ {\begin{array}{*{20}{c}} {{Q_5} - {Q_6} - {Q_7} = 0}\\ {\begin{array}{*{20}{c}} {{Q_7} + {Q_3} - {Q_4} = 0}\\ {\Delta {p_{{\rm{6}} - {\rm{7}} - {\rm{14}}}} = \Delta {p_{{\rm{6}} - 12 - 14}}} \end{array}} \end{array}} \end{array}}\\ {\Delta {p_{7 - 14 - 10}} = \Delta {p_{7 - 10}}} \end{array}} \end{array}} \right.$

 ${\delta _p} = {f_n}\left( {\frac{1}{2}\rho u{A_n}} \right)$

 ${Q'_n} = {Q_n} + {\delta _q} = {Q_n} + \rho u{A_n}$

3 计算流程

4 移动体落棒性能计算

4.1 时间步长的选择

4.2 基准结构尺寸移动体的落棒运动

5 PSS结构敏感性分析

1)移动体下节流孔的尺寸敏感性计算结果

2)移动体上节流孔的尺寸敏感性计算结果

3)移动体上出口腰型孔尺寸的敏感性计算结果