A new cross section adjustment method of removing systematic errors in fast reactors

•Systematic errors included in measurements and calculation are estimated by using the bias factors.•The systematic errors are removed in the new cross section adjustment method.•The new method has been applied to 589 measured data in fast reactors.•The C/E values of 589 neutronics parameters are improved by the new adjustment method.•The adjusted cross sections are compared with those obtained from the commonly used cross section adjustment.