Excess reactivity


Higher reactivity value than required to achieve criticality of a reactor. Provision is made for excess reactivity in the loading of a reactor with fuel elements to balance burnup and the accumulation of fission product poisons during operation. The excess reactivity existing in a freshly loaded reactor is balanced by the position of shim and control rods or by adding boron to the reactor coolant.








11 - 15 March 2018
Munich, Germany


30 September - 04 October 2018
Prague, Czech Republic