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概要

This paper introduces a new technique for supporting sensor inspection interval judgment by using an online sensor monitoring system for pressurized water reactor (PWR) plants. This system models the characteristics of the sensors just after the planned outage and monitors sensors during a plant operation b y predicting true value and evaluating just before the next planned outage sensor drifts that is difference between true value of a parameter and measured value of the sensor. The system can detect the defect sensor, or the intact sensor exhibit a sufficiently small drift and need no calibration at the time.

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