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Generic Enabling Events
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Welcome to this Application Explainer video, part of our global topic range.
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In this video, we’ll cover the subject of Loper Generic enabling events in SLM in a layers of protection analysis.
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An enabling event refers to a condition that, while not directly causing a hazard, must be present or active alongside an initiating event for a dangerous scenario to progress and reach a significant consequence.
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The following information will be covered in this training.
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Chapter one will be Enabling Events overview and Chapter 2 will be application within the PHA study.
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In Chapter 1 we’ll cover the purpose of global enabling events, creating a new global enabling event and syncing site Global Enabling Events with the enterprise whilst conducting a LOPA.
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It is often the case that enabling events will need to be considered while trying to properly assess and reduce the risk of a hazard occurring for a given scenario.
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It’s possible that these values can be used inconsistently due to calculations being made on the spot or transcription errors that may occur from company or facility predetermined values.
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To address this, SLM provides a way to standardise all probability values for enabling events across the entire facility at the site level or the company at the enterprise level if needed, based on predetermined values established by the company.
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Once these global enabling events have been created, they can be easily applied to any PHA, cutting down facilitation time and increasing accuracy in scenario calculations.
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Global enabling events can be added at the Enterprise Oregon site objects depending on the level of granularity needed.
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If enabling events will be standard across all sites in a company, the global enabling events should be added at the Enterprise level.
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If the type of value for enabling events differ from site to site, then the global enabling events should be added at the site level.
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To add global enabling events in the Global module, click on the Enterprise object, navigate to the LOPA Generic Enabling Events tab, and add Global Enabling Events.
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Here you can add the enabling factor and the probability for each of your consequence categories.
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To copy enabling events from the enterprise across all sites on the Enterprise level, click on Sync across Sites to add it to one particular site.
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Navigate to the site, click on Global Generic Enabling Events tab and select Sync with Enterprise.
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This brings down the enabling events and their probabilities from the enterprise to add to the current list at the site.
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In Chapter 2, we will cover applying global enabling events to the HAZOP study and applying global enabling events to the LOPA study in SLM.
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Enabling events can be applied to scenarios in both the HAZOP and LOPA modules in a very similar way.
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To proceed, in the HAZOP module, navigate to the desired HAZOP study and node.
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On the Facilitation tab, Scroll to the Enabling Events section for the desired scenario.
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Click on the Edit button to view a list of enabling events for the scenario in the top section and enabling events from the Global module on the bottom section.
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Check all global enabling events from the Global module on the bottom section to be applied to the scenario and under the Custom Actions menu, click Copy Global Enabling Events.
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This will now create a copy of those global enabling events that can now be applied to the scenario and they can be seen in the scenario here.
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To proceed in the local module, navigate to the Local module and to the desired local worksheet.
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On the Applicable Values tab, in the Initiating Courses section, under the Custom Actions menu, click on Manage Enabling Events.
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This will show a light box with the same information as mentioned in the Hazard module.
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Check all global enabling events to be applied to the scenario and under the Custom Actions menu, click Copy Global Enabling Events, which will create a copy of those enabling events in this section above to be applied for the scenario for both Hazop and LOPA.
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Once the enabling events are listed in the top section, they can be applied at the user’s and facilitator’s discretion.
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The enabling events selected are applied here to this scenario as seen by the Yes values.
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