Simulation Calculation of Response to Linear Positive Reactivity Inserted in Reactor with Temperature Feedback

In this paper,the model is founded with point-reactor neutron kinetics equation,and main parameters of a small reactor are calculated under six typical operation conditions,when a linear positive reactivity is inserted.The results are compared with those obtained by 3-D real-time simulation software of reactors.It is shown that point-reactor model can describe the maximum changes and steady values of main parameters in the reactor when a linear positive reactivity is inserted,although improvements are also needed in calculating the response time and duration of the fluctuation.