Automation system for nuclear power plants

An automation system for nuclear power plants, comprising:

• operation plan making means for, after a nuclear power plant has been operated according to an operation plan under abnormal condition, making an operation plan to return to the normal operating condition, which had existed before the plant condition deviated from the normal operation range, from a condition that the operation according to the operation plan under abnormal condition has been finished;
• means for storing said operation plan under abnormal condition to decrease the reactor power to a level of power within said normal operation range when the operating condition of said nuclear power plant deviates from said normal operation range;
• means for deciding from detected plant data whether or not to perform an operation according to said operation plan under abnormal condition;
• control and arithmetic means for outputting control commands according to the operation plan;
• means for transmitting said operation plan under abnormal condition to said control and arithmetic means when said decision means makes a decision to perform an operation according to said operation plan under abnormal condition;
• supervisory control means having the control and arithmetic means for outputting control commands according to said new operation plan when said operation plan under abnormal condition has been executed;
• and
• control means for controlling controlled operation conditions of the plant according to said control commands.