31. Control rods that are made of a neutron poison are used to absorb neutrons.32. The control rod channels are cooled by an independent water circuit and kept at. 33. The remaining 20 positions are reserved to the control rods . 34. Consequently, the reaction can be controlled with electromechanical control systems such as control rods . 35. The boron in the control rods stopped the nuclear reaction. 36. Moderator ejected during the Chernobyl disaster shows an intact control rod channel . ]] 37. The vessel contains nuclear fuel and the control rod drive regulates the reactor's output. 38. Numerous procedures were conducted to evaluate control rods to ensure they were operating properly. 39. Twenty-one control rods were provided, long, across and thick. 40. Either inserting the control rods or removing the heavy water moderator can stop the reaction.
