The invention discloses a
data processing method for measuring prompt
neutron attenuation parameters for a reactor. The method includes the alpha reactivity measurement principle that rho equals to (alpha-alpha 0) / alpha 0, wherein alpha and alpha 0 are the prompt
neutron attenuation parameters, the unit of the parameters is s-1, rho is reactivity, and the unit of the reactivity is beta eff. The invention further includes the following steps that firstly, a
data point n of the prompt
neutron attenuation parameter alpha i taking participation in fitting is determined; secondly, a
control rod for scaling is determined, the scale is represented by H, the unit is
centimeter, the
control rod is lifted to the top according to a rod lifting program, the
control rod on the periphery is kept static after critical leveling, then the control rod is evenly inserted to the bottom in n steps, and one corresponding alpha i value is obtained each time the control rod is inserted by one Hi rod position, wherein n is a natural number larger than zero; thirdly, each time the control rod is inserted to the Hi rod position, the emission frequency of pulse neutrons is adjusted according to the estimated alpha i values, so that in one
pulse period, attenuation of the prompt neutrons is right completed, delayed neutrons are close to the bottom, and one alpha i value is obtained by means of a measurement curve according to
least squares fitting.