Patent ID: 9236152
Filing Date: 2016-01-12
CPC Classification: G21C,Y02E

Claim Text:
1. A method for detecting rod drops in a pressurized-water nuclear reactor, said method comprising the steps: measuring a neutron flux value over time, continuously calculating a derivative of the measured neutron flux value, detecting a negative derivative of the neutron flux value, and comparing the absolute value of said negative derivative with a first threshold value (S triggering a first time interval (ΔT) if said absolute value of said negative derivative is greater than said threshold value (S detecting a positive derivative of said neutron flux value within said first time interval (ΔT), and comparing the absolute value of said positive derivative with a second threshold value (S if, during said first time interval (ΔT), said absolute value of said positive derivative is greater than the second threshold value (S