Back to home
A technique to prioritize plausible counter operation procedures in an accidental situation of plants   INOUE Takahisa1, and GOFUKU Akio2   1. Graduated School of Natural Science and Technology, Okayama University, 3-1-1, Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan (inoue.tk.mif@s.okayama-u.ac.jp) 2. Graduated School of Natural Science and Technology, Okayama University, 3-1-1, Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan (fukuchan@sys.okayama-u.ac.jp)   Abstract: For accomplishing the safety of a large-scale engineering plant, the common approach is to suppose various emergency situations and prepare in advance effective measures. However, there may happen an unanticipated event. Therefore, it is very important to generate support information for operators to take responsive actions. The previous study developed a technique to generate plausible operation procedures for an emergency situation based on a functional model. Although the algorithm produces some plausible counter operation procedures, it does not indicate which counter operation procedure is suitable. It is desirable for operators that the technique can prioritize the counter operation procedures produced. This study proposes a technique to prioritize plausible counter operation procedures considering the accidental situation happened and the strategy of counter operation decided by operators. The counter operation procedures are evaluated by several evaluation indices such as the effect for achieving the objective, the required time of executing a counter operation procedure, the influence on the environment, and so on. These indices are investigated from the viewpoint of risk assessment. The weights to evaluate the priority of a counter operation procedure are adjusted according to the counter operation strategy decided by operators. The priorities of counter operation procedures are finally determined by the weighted values of evaluation indices. The applicability of the proposed prioritizing technique is confirmed by several priority evaluating examples for the plausible operation counter procedures produced for the LOCA cases. Keyword: functional model; Multilevel Flow Modeling; counter operation procedure; prioritization
	Click here for viewing full text.