| 摘要 |
<p>PURPOSE:To make diagnosis by providing a means for checking the operation of a protective interlock thereby first hitting the true cause for the protective interlock operation even during the generation of the other causes under which bypass conditions hold. CONSTITUTION:An abnormality is detected by a plant protective system 2 when the fault arises in a plant 1. The various operation factor signals of the protective interlock and, for example, the operation check signals of the protective interlock of the scram of a nuclear reactor are then outputted. These signals are inputted from an input processing section 4 of the plant fault diagnosing device 3. The operation factor signal is first hit and is once registered but the registration is erased when there is no input of the operation check signal within the prescribed period of time at this time. The interlock operates at this time and the operation check signal is inputted, then the holding of the two signals; this signal and the previous operation factor signal is first hit and the operation factor signal under the registration is diagnosed 5 as the first hit. In addition, this signal is displayed 7 via an output processing section 6.</p> |
