Study On Performance Of Reverse Arch Grooved Rupture Disc For Sodium-Water Steam Generator

The replacement cycle of the rupture disc has always been a problem that plagued the users and the manufactures.In addition,most of the current standards for rupture disc life and replacement cycle only indicate general qualitative requirements,and seldomly quantitative data of replacement cycle has been given.The replacement of rupture discs which were used for a long time has been waiting for solution.To solve this problem,it is necessary to clarify the life of the rupture disc,and the quantification of the life of the rupture disc is related to its performance under load.In this paper,the reverse arch grooved rupture disc of the sodium-water steam generator is used as the research object.And its static load and fatigue load performance are studied to quantify its endurance and fatigue life..The main research contents and conclusions are as follows:?1?This paper builds a normal temperature experimental platform for rupture discs and compares the life changes of different processes and different materials.The study uses large operations to obtain reliable data in the short term and fits the formulas to predict the life of the rupture disc at lower operating ratios.The experimental results show that the secondary precision streching process will reduce the endurance life and fatigue life of the reverse arch grooved rupture disc.The endurance and fatigue life are mainly affected by the operation ratio,and the material composition has little effect on them.The prediction formulas of the endurance life and fatigue life of 316L stainless steel reverse arch grooved rupture disc are given respectively.316L stainless steel reverse arch grooved rupture disc?once precision stretching?:t=??0.9816?/W?^104.17,N=0.972(e^{-135.135?W-1?}-1).316L stainless steel reverse arch grooved rupture disc?secondary precision streching?:t=??0.9897?/W?^75.19,N=3.0178(e^{-79.5545W+79.58}-1).?2?A high-temperature experimental platform for rupture discs is built to compare the life changes of different materials and different temperatures of rupture discs.It is found that the reverse arch grooved rupture disc is affected by residual stress and creep at high temperature,and the former plays a leading role.The empirical formulas for predicting the endurance life and fatigue life of the 316L stainless steel reverse arch grooved rupture disc at 320°C are given:t=??0.98417?/W?^214.59,N=19.4288(e^{-103.413W+103.281}-1).?3?A dynamic responsiveness experimental platform for rupture discs is built,and different boosting rates are obtained by replacing the explosive medium and the initial pressure.The experimental results show that the acetylene-air premixed gas can obtain extremely high pressure-increasing rate and explosion pressure at a very low initial pressure in the U-tube device.The study gives a piecewise relationship between the boost rate and the overpressure multiple.It is finally determined that the overpressure multiple of the reverse arch grooved rupture disc of the sodium-water steam generator is 1.138 to 1.193 times.?4?It is difficult to apply the life experience formulas obtained from the laboratory conditions directly to the actual project.So this study proposes a endurance life safety factor of 20.The engineering life prediction formulas of the reverse arch grooved rupture disc are obtained by dividing the endurance life obtained under the laboratory by the safety factor of 20.The research is verified by the engineering application examples.The results show that the engineering life prediction formulas of the inverted arch grooved rupture disc have universality and reliability.Finally,the engineering life prediction formulas of the inverted arch grooved rupture disc for the sodium water steam generator are given.