Excess reactivity

Higher reactivityMeasure of the deviation of a reactor from critical (self-su... value than required to achieve criticalityThe condition of a nuclear reactor where a reaction initiate... of a reactorSystem used to initiate, maintain and control a fission chai.... Provision is made for excess reactivityMeasure of the deviation of a reactor from critical (self-su... in the loading of a reactorSystem used to initiate, maintain and control a fission chai... with fuelSee 'nuclear fuel'. elements to balance burnup and the accumulation of fissionSee 'nuclear fission'. product poisons during operation. The excess reactivityMeasure of the deviation of a reactor from critical (self-su... existing in a freshly loaded reactorSystem used to initiate, maintain and control a fission chai... is balanced by the position of shim and control rods or by adding boron to the reactor coolantCoolant used to remove heat from the reactor core. (See seco....