Patent Number: 
Section: claims

1. A protection system for a nuclear boiling water reactor, the protection system comprising:a device configured to monitor reactor power;a device configured to monitor reactor pressure;a device configured to determine a first high reactor pressure setpoint that corresponds to 100% reactor power and at least one second high reactor pressure setpoint that corresponds to one or more values of percent reactor power in an operating domain of the reactor, based on the monitored reactor power; anda device configured to initiate a protection system action when the monitored reactor pressure is greater than the first high reactor pressure setpoint or the at least one second high reactor pressure setpoint;wherein the at least one second high reactor pressure setpoint is less than the first high reactor pressure setpoint. 2. The system of claim 1, wherein the device configured to initiate a protection system action initiates a reactor scram when the monitored reactor pressure is greater than the first high reactor pressure setpoint. 3. The system of claim 1, wherein the device configured to initiate a protection system action initiates a warning, an alarm, or a warning and an alarm when the monitored reactor pressure is greater than the first high reactor pressure setpoint. 4. The system of claim 1, wherein the device configured to initiate a protection system action initiates a reactor scram when the monitored reactor pressure is greater than the at Least one second high reactor pressure setpoint. 5. The system of claim 1, wherein the device configured to initiate a protection system action initiates a warning, an alarm, or a warning and an alarm when the monitored reactor pressure is greater than the at least one second high reactor pressure setpoint. 6. The system of claim 1, further comprising:one or more signals in the system that correspond to one or more values of percent reactor power;wherein the one or more signals in the system that correspond to one or more values of percent reactor power are delayed in time before the one or more signals in the system that correspond to one or more values of percent reactor power affect the at least one second high reactor pressure setpoint. 7. The system of claim 1, further comprising:one or more signals in the system that correspond to one or more values of percent reactor power; andone or more signals in the system that correspond to reactor pressure;wherein the one or more signals in the system that correspond to one or more values of percent reactor power are lagged relative to the one or more signals in the system that correspond to reactor pressure.