Taking China supercritical water reactor（CSR1000） as the research object, the effect of the disturbance of feed water flow on reactor core water flow is studied by the method of program calculation. The results show that the coolant flow of the first and second processes decreases and the reactor power decreases after the 5% step drop of feed water flow, and the decrease of feed water flow will bring about Doppler feedback change, which will lead to negative reactivity. In Doppler feedback, the change of the ...
