Design of constant pressure flow measurement system for containment based on step algorithm
As the third safety barrier of nuclear power plant,containment is the material basis for ra-dioactive containment under severe accident conditions.In order to avoid the problem of large measure-ment deviation in the regression analysis of the significant nonlinear characteristics of pressure changes in the traditional pressure attenuation method of the containment leakage rate measurement scheme,the team invented the constant pressure method of the leakage rate measurement scheme.The solution re-quires that the pressure inside the containment vessel be kept basically constant,that is,the inflow and outflow of the containment gas reach a dynamic equilibrium state,and the pressure inside the containment vessel always fluctuates slightly around the target pressure value attachment.In order to achieve the above control goal of constant pressure inflation of containment,this paper designs and develops a constant pres-sure flow measurement system based on PLC and step algorithm,verifies its function through experi-ments,and determines that it is suitable for positive pressure,negative pressure and other application scenarios of different specifications of containment,and can better meet the functional requirements of the leakage rate measurement scheme of constant pressure method.
万方数据
维普
