Step4) Activation of the Operation Generator 

The Operation Generator figures out the necessary plant operations to deal with the unforeseen 
abnormal situation. This module utilizes the Device Model and the Operation Principle Model. 

op.1op.2op.3op.4op.5
c_cwp onc_cwv openc_bfp onc_fwcv openc_fwcv auto
op.6op.7op.8op.9op.10
a_fwcv handa_fwcv closea_bfp offa_cwv closea_cwp off
P.22 Figure 1
Step5) Activation of the Precondition Generator This module generates the preconditions for each plant operation, and compiles plant control rules as follows.
P.22 Figure 2
Step6) Activation of the Simulation-Verifier This module verifies the compiled rules by predicting the plant behavior to be observed when the plant is operated according to the compiled rules. Step7) Execution of the plant operation The video tape reproduces the scene of a plant whose operations are executed by the Shallow Inference Subsystem according to the compiled rules. To clarify the system's capability, the video tape also reproduces the scene of a plant being shutdown when none of the generated operations are executed. - 22 -