A Stress Calculation Method for Guide Thimbles in Fuel Assemblies Under Accident Conditions

QI Huan-huan; SHEN Ping-chuan; WU Wan-jun; JIANG Nai-bin; HUANG Xuan

doi:10.3879/j.issn.1000-0887.2016.05.009

Volume 37 Issue 5

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QI Huan-huan, SHEN Ping-chuan, WU Wan-jun, JIANG Nai-bin, HUANG Xuan. A Stress Calculation Method for Guide Thimbles in Fuel Assemblies Under Accident Conditions[J]. Applied Mathematics and Mechanics, 2016, 37(5): 534-541. doi: 10.3879/j.issn.1000-0887.2016.05.009

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A Stress Calculation Method for Guide Thimbles in Fuel Assemblies Under Accident Conditions

doi: 10.3879/j.issn.1000-0887.2016.05.009

Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China, Chengdu 610041, P.R.China

Received Date: 2015-10-29
Rev Recd Date: 2015-11-17
Publish Date: 2016-05-15

Abstract

Abstract

Through the dynamic analysis of reactor systems, the displacementtime histories of upper/lower core plates and core barrels were obtained. The time history was then treated as the input for seismic and LOCA analysis of the fuel assembly. Then the horizontal row model of the fuel assembly was built for the dynamic analysis under accident conditions. From this analysis, the displacements of the fuel assembly was got as the input for the guide thimble stress calculation. According to the simplified method for the horizontal row model and the guide thimble distribution in the fuel assembly, the calculation method for the membrane stress and bending stress was deduced. The issues in the use of this method were described. The process of stress analysis and evaluation for the guide thimbles was schemed and realized through programming. With the presented method, stress analysis and evaluation of the guide thimbles in one power plant were effectively carried out as an example.
- fuel assembly,
- guide thimble,
- accident condition,
- stress calculation method

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References(8)

References

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