The security assessment identified building and process-level needs, from a threat assessment and vulnerability perspective.
The condition assessment identified equipment renewal and replacement needs, based on the remaining useful life of selected plant assets. The long term process strategies focused on regulatory drivers and other plant-level needs. Coordinating the results of these three studies into a single, unified asset management plan presented several challenges. Decisions on if, when, and how to replace or rehabilitate plant assets had to consider the age and condition, consequences of failure, and role in long term process strategies of each asset.
As an example, replacing obsolete equipment may not be worthwhile at facilities soon to be retired due to new or modified processes.
However, particular assets at these facilities which carry high consequences of failure, are in poor condition, or have a security risk may still pose a risk to utilities. A risk scoring framework was developed to identify such assets.
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There were also logistical challenges in managing the large volume of data and risk computations, as approximately 1, plant assets were included in the asset management plan. This tool utilized a network connected database to automate data storage and analysis tasks. The AMDS Tool also supported field inspections using network-connected tables, resulting in better organization and time savings.
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This paper describes the robust risk scoring framework applied to each asset and AMDS software tool. The results of the study, and how they were coordinated ongoing plant projects, will also be discussed. The security, condition assessment, and long term process strategy development began in and was completed in The small number of high risk assets identified in the asset management plan were addressed in, or added to, the construction portion of the Facility Improvements Project.
Others were added to the scope of future projects developed as part of the long term process strategy. Needs identified by the asset management plan that did not fit into existing projects were added to special equipment renewal and replacement projects. Means and Methods: Asset renewal and replacement needs were identified and prioritized using two metrics: probability of failure PoF and consequence of failure CoF. PoF was determined from the condition assessment.
Assets were selected for condition assessment based on their relative significance to overall operations. Each selected asset was visually inspected in the field and assigned a condition score. The database component of the AMDS software tool stored the results of each inspection and photographs.
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Inspectors entered scores directly into network connected tablets, and uploaded photographs form the device cameras. This improved the efficiency of field efforts and reduced opportunities for errors to occur. CoF were scored for each asset using a multiparameter risk analysis matrix. Results of the security assessment were utilized as one of the bases to score assets in these criteria.
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