Gestão de riscos aplicada a controles críticos em subestação de energia de uma mineradora

Abstract

The approach of risk management in organizations is in constant evolution, with the goal of reinforcing the safety of people and operations even more. This work identifies an undesirable material event, characterizes the models of risk management, promotes an investigation pattern, and presents an improvement on risk management of fires, and/or explosions of the critical assets from one of the biggests mining factory's energy substations in northeast Brazil. For that, the methodologies used in this work, exploiter and qualitative based on in this case study, had as a foundation for this research a guide of good practices, operational procedures, and patterns towards risk management to complement the study. The Bowtie technique of risk evaluation was used on the critical control mapping, and there were identified: 7 causes, 20 preventive controls, 14 mitigatories controls and 11 consequences, which 10 of them are critical. The biggest critical control incidence it's on the preventive maintenance activity in devices on the power substation's subsystems. Tests and verifications of this critical control are established with clear and well-defined rules on the organization's internal documents, which were evaluated by high scale liders. Although the preventive maintenance of the power substation's critical asset had an increase in the disclosure of safety and operation deviations, its shows a behavior change of the employees regarding the execution of maintenance, and that the goals that were set in this work were achieved, there are still weaknesses in the control, since the physical and automated barriers were not identified. The verification and testing process have been done by the risk managers, by the engineering, and the coordination of corporate risk management, which have attested the established performances and improvement recommendations.