Nuclear power plant accident response support system

摘要

PURPOSE:To obtain a failure support system for nuclear power plant in which a scram failure is prevented effectively from developing into a severe accident. CONSTITUTION:When a scram failure occurs, an emergency reactor stop operation confirming/dealing system 22 designates insertion of a control rod based on a reactor emergency stop command and confirms operation corresponding to the command. Nonoperative state is detected in early stage and next backup means, i.e., emergency injection of boric acid water, is commanded and if the nonoperative state is sustained, heavy water damp is commanded. At the same time, a reactor cooling state evaluating/dealing system 23 evaluates the cooling state of reactor in real time and operates an emergency reactor core cooling system or a backup cooling system, e.g. an isolated cooling system, depending on the evaluation results thus ensuring the cooling of reactor core. This system prevents a scram failure from developing into a severe accident.