Patent ID: 8995601
Filing Date: 2015-03-31
Classification: G21C,G21D,Y02E

Abstract:
1. An axial power distribution prediction device, comprising: an axial offset calculation unit that calculates an axial offset of a current power distribution (AO P P P P based on a relative power (P T ) in the upper half of the nuclear reactor core and a relative power (P B ) in the lower half of the nuclear reactor core; a parameter calculating unit that calculates a xenon parameter represented by using a difference between AO a trajectory display unit that acquires the xenon parameter and the iodine parameter calculated by the parameter calculating unit, and generates an ellipse-shaped plot trajectory by setting the xenon parameter as x-coordinate and the iodine parameter as y-coordinate in a Cartesian coordinate system on a display unit; and an axial offset determining unit that predicts whether a core axial offset of the power distribution after a current time is increased or decreased, by drawing a major axis in the ellipse-shaped plot trajectory and generating a plot point using a xenon parameter and an iodine parameter at the current time, wherein the core axial offset of the power distribution after the current time is determined to be decreased when the plot point is located above the major axis and the core axial offset of the power distribution after the current time is determined to be increased when the plot point is located below the major axis.