Patent ID: 6980619
Filing Date: 2005-12-27
Classification: G21C,G21D,Y02E

Abstract:
1. A method for scramming a nuclear reactor system, comprising: positioning a guide tube within a core of said nuclear reactor, said guide tube comprising: positioning a control element within the control element section of the guide tube, the control element being moveable within the control element section of the guide tube between an upper position and a lower position; providing a coolant to the coolant inlet end of the core; removing heated coolant from the coolant outlet end of the core, said providing coolant and said removing heated coolant creating a pressure differential across the control element section of the guide tube; and using the pressure differential to hold the control element at about the upper position in the control element section of the guide tube, the control element automatically falling under the action of gravity to the lower position when the pressure differential drops below a safe pressure differential.