Semi-Analytical Solution of Temperature Rise Caused by Irradiation Effect for Perforated Plates with Square Penetration Patterns in Reactor Vessel Internals
In Reactor Vessel Intemals(RVI),the temperature rise caused by the irradiation effect is significant for the thick perforated plates.Due to the complexity of the structure,its temperature rise is generally calculated by finite element method.In this paper,the semi-analytical method is used to calculate the maximum temperature rise of the perforated plate with square penetration pattems under irradiation effect.The calculation formula of the temperature rise of the structure is obtained,and the calculation results are compared with the finite element results.The results show that the deviation between the maximum temperature rise calculated by the formula and the finite element results is less than 2％when the radial range of the peak value of γ heat release rate is greater than 4 times the spacing between holes,and the temperature distribution in the thickness direction where the maximum temperature rise is calculated by the formula is in good agreement with the finite element results.
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