| 摘要 |
<p>PURPOSE:To objectively judge an increase or a decrease of the dangerousness by providing a plant dangerousness judging means and a dangerousness display means displaying the plant dangerousness on the dangerousness monitor of a control board in real time. CONSTITUTION:A plant monitoring device judges the initial dangerousness when an abnormality occurs and an increase or a decrease of the plant dangerousness due to the abnormality recovery operation with objective data of main parameters such as the nuclear reactor water level, neutron flux, power generator output, nuclear reactor pressure, dry well pressure and atmospheric radiation rate via a plant dangerousness judging means 10 and displays the dangerousness on a dangerousness monitor 12 provided on a control board 1 with a dangerousness display means 11 in real time. The dangerousness for the parameter unit is dividedly set into six stages between the warning level and the plant trip level of each parameter different for each plant. The plant dangerousness is divided into five stages for judgment based on the dangerousness of judged six main parameters of the plant. The dangerousness is individually judged on six most dangerous parameters in the plant behavior, and the highest dangerousness in them is set as the plant dangerousness.</p> |
