Integrated HIPPS/ESD Safety Chain Tests

This repository now includes an integration test that links alarms, HIPPS isolation, and ESD depressurization logic against dynamic equipment models during a transient upset. The goal is to verify that layered safety functions respond coherently when feed pressure surges beyond high-high limits.

What the test covers

• Alarm validation: A separator pressure transmitter with HI/HIHI limits moves into alarm as the feed surge pushes pressure upward.
• HIPPS isolation: Three redundant pressure detectors (2oo3 voting) trip HIPPS logic that drives the HIPPS Isolation Valve closed in under two seconds.
• ESD escalation: If pressure remains high three seconds after HIPPS closure, HIPPS escalates to ESD Level 1, closing inlet valves, opening the blowdown valve, and routing gas to the flare.
• Dynamic response: The scenario runs as a transient simulation, confirming separator pressure falls while flare flow rises once ESD starts depressurizing.

Running the integration test

Execute the JUnit test directly:

mvn -q -Dtest=IntegratedSafetyChainTransientTest test

The test lives at src/test/java/neqsim/process/util/scenario/IntegratedSafetyChainTransientTest.java and uses ProcessScenarioRunner to coordinate logic execution with the process model.