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This thesis proposes an integrated learner combining analytic and empirical learning methods to learn the handling knowledge that can prevent Power Operated Relief Valves to open causing radiation release during the Steam Generator Tube Rupture accident.This learner extracts useful information from both positive and negative examples, fed by the plant's operators or the on-line simulator, to deal with multiple errors in the domain theory. This approach features its incremental learning technique without rememberingall examples; a stronger negative examples processing capability to help thedomain theory to fast recognize future system error; and a domain model , bythe help of analyzing the example, to help reduce induction space.
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