NEM Generating Unit Outage / Maintenance Plan (Internal)

Internal generating-unit outage and maintenance plans held by a NEM generator before (or in more detail than) the public PASA submission: planned outage schedules and overhaul programmes listing the unit or DUID, outage start and finish dates, MW deratings, unit states, work scope and return-to-service (RTS) dates or unit recall times. The unit-level PASA availability and unit-state codes AEMO publishes under NER cl 3.7.2(f)(5) (NEMweb MTPASA_DUIDAvailability / STPASA_DUIDAvailability) are public and treated as decoys; the plan detail behind them (scope, work orders, exact dates, reason narrative, drafts not yet submitted) is not published.

Type: regex
Engine: boost_regex
Confidence: medium
Confidence justification: Medium: "planned outage" and "return to service" are generic (IT, network and fleet maintenance use them), so enforce tiers require generator-specific structure: a dated schedule row carrying MW or an NER unit-state token, or a populated DUID / outage / RTS field. Public AEMO PASA CSVs are excluded on their header markers. 85/75 are heuristic evidence tiers, not measured accuracy.
Jurisdictions: au
Regulations: National Electricity Rules, Security of Critical Infrastructure Act 2018 (Cth)
Frameworks: ISO 27001
Data categories: energy-market, infrastructure, business
Scope: narrow
Risk rating: 7
Platform compatibility: Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Degraded, Netskope: Unsupported

Pattern

(?i)\b(?:(?:planned|unit|generating\s+unit|major|minor|maintenance)\s+outage\s+(?:plan|schedule|programme|program|window)|outage\s+plan(?:\s+rev(?:ision)?)?|planned\s+outage|maintenance\s+outage|overhaul\s+(?:plan|schedule|programme)|return\s+to\s+service|RTS\s+date|unit\s+recall\s+time)\b

Corroborative evidence keywords

DUID, derate, return to service, unit recall time, PASA availability, work order, scope of work, overhaul

Proximity: 300 characters

Should match

Unit 3 major outage plan - rev C DRAFT (not yet submitted to AEMO) DUID: TARONG3X Outage start: 02/03/2027 RTS date: 14/04/2027 Schedule: 02/03/2027 to 09/03/2027 unit offline 0 MW OUTAGEPLANBASIC boiler inspection 10/03/2027 to 14/04/2027 turbine overhaul, HP rotor exchange Scope of work: HP/IP turbine overhaul, boiler tube replacement, work order WO-448120. — Draft major outage plan with DUID, outage and RTS fields, dated MW / unit-state row and work scope - intended 85
Planned outage schedule - Kogan Ridge Units 1-2 Unit: KRIDGE1 15/11/2026 - 22/11/2026 derated to 180 MW for mill overhaul Return to service: 23/11/2026 06:00 Work order: 7732019 — Planned outage schedule with populated unit and work-order fields and a derating row - intended 85
Minor outage window, Unit 2 05/06/2027 to 07/06/2027 DERATINGPLANBASIC 210 MW available; condenser tube cleaning. — Outage window with a dated row carrying a unit-state token and MW - intended 75
Maintenance outage for the air heater has been moved. DUID: STANW4B Revised timing has been agreed with operations. — Maintenance outage note with a populated DUID field - intended 75

Should not match

C,NEMP.WORLD,MTPASA_DUIDAVAILABILITY,AEMO,PUBLIC,2026/09/24,10:00:00 I,MTPASA,DUIDAVAILABILITY,1,DAY,REGIONID,DUID,PASAAVAILABILITY,PASAUNITSTATE,PASARECALLTIME,LATEST_OFFER_DATETIME D,MTPASA,DUIDAVAILABILITY,1,2026/10/01,QLD1,BARCALDN,0,OUTAGEPLANBASIC,48,2026/09/23 14:00:00 planned outage return to service — Public AEMO MTPASA_DUIDAvailability extract with unit-state codes
PASA availability means the physical plant capability available in a particular period, including any physical plant capability that can be made available during that period on 24 hours notice. The unit state must distinguish between a physical and economic reason for unavailability, and the unit recall time is the period in which the plant can be made available. — NER definitions of PASA availability, unit state and unit recall time
Planned outage: the customer portal will be unavailable from 01/10/2026 to 02/10/2026 while we upgrade servers. Service will return to service by 6am. — IT planned outage notice with a date range but no MW or generator fields
Outage plan template DUID: ________ Outage start: [dd/mm/yyyy] RTS date: [dd/mm/yyyy] Derated to: ___ MW — Blank outage plan template
A unit at the Queensland coal station tripped offline on Monday and is expected to return to service later this week, the operator said, as AEMO issued a market notice on reserve levels. — News report / market notice

Known false positives

AEMO public MT PASA and ST PASA DUID availability files list DUIDs, PASA availability and unit-state codes. Mitigation: The ",AEMO,PUBLIC," header, PUBLIC_MTPASA / PUBLIC_STPASA filenames, I,MTPASA,DUIDAVAILABILITY and the PASAAVAILABILITY,PASAUNITSTATE column header are excluded within the proximity window.
IT, telecommunications and network planned-outage notices. Mitigation: Enforce tiers require a MW figure, NER unit-state token or populated DUID / unit / RTS / work-order field.
NER definitions, AEMO ESOO and MT PASA reports, market notices and news about unit trips. Mitigation: No populated schedule rows or plan fields; ESOO, market notice and media release terms are excluded.