NTF11645 – Incident details

Written by Claude Haiku 4.5 from the extracted text on 10 Jul 2026. It can miss or misread redacted and scanned pages. Check the source before relying on it.

Woodside Energy Ltd reported a notifiable incident (NTF11645) on 14 July 2022 at the Vincent offshore facility in Western Australia involving two safety-critical valves that failed to meet performance standards during annual emergency shutdown (ESD) testing. One valve (Inlet Alpha STV, Tag 46XV5000 Alpha) took 1.2 seconds to close instead of the required 1 second; the other (Inlet Heater Bravo STV, Tag 46XV5000 Bravo) failed to close entirely. NOPSEMA classified this as a dangerous occurrence involving damage to safety-critical equipment and escalated it to Level 1 investigation on 18 July 2022. Woodside planned a four-day outage to investigate and indicated the root cause assessment would determine whether component or entire valve assemblies required replacement. The initial report was submitted on 16 July and reviewed on 19 July 2022.