Reactor power output measurement device

A reactor power output measurement device measuring a neutron flux with a traversing incore probe (TIP) traversing in a vertical direction in a core of a reactor, and calibrating a detection sensitivity of a local power range monitor based on a measured neutron flux distribution in the axial direction inside said reactor, said device comprising:

• a detector drive system for said TIP;
• a drive control unit including a drive control device for controlling said detector drive system, and a drive unit operation/monitor means for operating and monitoring said drive control devices;
• a TIP integrated control unit including
• an integrated control means for signal processing said measured neutron flux;
• an integrated unit operation/monitor means for monitoring processing of measured neutron flux in said integrated control means and for communicating with the detector drive system via the integrated control means, said integrated unit operation/monitor means also being connected to said drive control unit for operating and monitoring the drive controlling said detector drive system;
• and
• an integrated unit input/output means for inputting/outputting a neutron flux measured by said TIP;
• a data processing terminal and a printer connected to said TIP integrated control unit;
• wherein said reactor power measurement and display device displays and records said measured neutron flux and said neutron flux distribution in the axial direction inside said reactor.

Apparatus for calibrating detection sensitivity of a reactor power output measurement device having a local power range monitor for measuring neutron flux within said reactor, said apparatus comprising:

• a plurality of traversing incore probes (TIP's) which traverse a core of said reactor, for measuring neutron flux within said core;
• a plurality of detector drive systems for moving said TIPS, one detector drive system being provided for each TIP;
• a plurality of drive control units, one drive control unit being associated with each detector drive system, each of said drive control units including a drive control device and a drive unit operation/monitoring means for operating and monitoring said drive control device;
• and
• a unified central control unit, including a unified central control device for providing control data to each of said drive control devices and a unified central unit operation/monitor means for operating and monitoring the unified central control device;
• wherein, in response to a failure of the drive unit operation/monitoring means in a drive control unit, operation and monitoring of the drive control device of the said drive control unit is switchable to said unified central unit operation/monitor device.