| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure the axial power distribution of the core in various core states. SOLUTION: In this measuring method, the axial power distribution of the core during operation is measured based on a measured value of a neutron detector mounted in a plurality of places along the axial direction of a pressure vessel and an expression showing the relation between the axial power distribution of the core and the measured value of the neutron detector. This measuring method comprises an analysis expression creation step of creating an analysis expression showing the relation between the axial power distribution of the core and the measured value of the neutron detector regarding, as a target, the core state whose axial power distribution of the core is actually measured, an analysis expression correction step of correcting the analysis expression created in the analysis expression creation step diverting data for correcting the analysis expression obtained using the actual operation of the nuclear reactor in another core state, and a core axial power distribution measurement step of using the measured value of the neutron detector and the expression obtained by correcting the analysis expression in the analysis expression correction step during operation of the nuclear reactor in the core state as the target of the analysis expression creation step. COPYRIGHT: (C)2008,JPO&INPIT
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