Operator situation awareness assessment model in a nuclear power plant

Situation awareness of operators plays a key role in the safety of a nuclear power plant. The establishment of a situation awareness assessment model (SAAM) is the foundation of an advanced HRA method. The paper firstly ascertains the relation between situation awareness and human reliability analysis and then forms an organization-committed cause-effect conception model. On the basis of the above, Bayesian network is used to build SAAM to conduct cause-effect reasoning and diagnosis. The technique makes an assessment on the external influences of the situation awareness of operators in case of given proofs and identifies quantitatively the leading factors affecting operator situation awareness.