Owner: AETV Pty Ltd
Status:
Technology Type: Turbine - OCGT
Fuel Type: Fossil - Natural Gas Pipeline
DUID: BBTHREE2
Capacity: 0 MW
Full Commercial Use Date:
Expected Closure Year:
Closure Date:
29 May 2026 04:00 → 30 May 2026 04:00 AEST · data through 30 May 2026, 04:00
Dispatch target (cleared) vs availability — 5‑minute intervals. TAS1 regional price (RRP) on right axis.
Estimated $ per interval using regional RRP and MLF effective on each day.
UNIT_SOLUTION (5‑minute intervals). Intervention intervals excluded.dispatch_price RRP matched by settlement time and NEM region (from generator registry).| Effective from | MLF |
|---|---|
| 2024-07-01 | 0.9977 |
| 2025-07-01 | 0.9986 |
| Capex total | $17.47M |
|---|---|
| Capex / MW | $436,742 |
| Capex / MWh storage | — |
| Fixed OPEX (annual) | $694.7k |
| Fixed OPEX / MW-yr | $17,368 |
| Variable OPEX / MWh | $16.10 |
| Fuel cost / GJ | $10.06 |
| Heat rate GJ/MWh | 12.04 |
Confidence: medium · Status: ai estimated · Capex basis: estimated · AI checked 04 Jun 2026
Notes: No specific financial and operating data available for Bell Bay Three. Information may need to be estimated based on OCGT technology defaults.
[AI 2026-06-04] Bell Bay Three BBTHREE2 is one of three Pratt & Whitney FT8 Twin Pac OCGT units. Generator-specific capex was not found; the profile uses a pro-rata allocation of Hydro Tasmania's reported A$50 million total project cost for three 38.75 MVA gas turbine units installed in 2005-06 and commissioned in 2006-07, divided by three and by 40 MW. Fixed and variable O&M are technology estimates from AEMO/Aurecon 2024 small aero-derivative OCGT parameters, not site-reported costs. Heat rate and efficiency use Mitsubishi Power FT8 SWIFTPAC public performance data for the same FT8 twin-engine aero-derivative package. Emissions intensity is calculated as heat rate 9.9 GJ/MWh multiplied by the Australian NGA 2025 stationary-combustion natural gas scope 1 factor of 51.53 kg CO2-e/GJ. No reliable public fuel price for Bell Bay Three was found. Closure/refurbishment: the original Bell Bay station ceased operations in 2009, but the three Bell Bay Three OCGTs became part of Tamar Valley Power Station; Hydro Tasmania stated in 2017 that the four open-cycle gas turbines at Tamar Valley would continue to provide peak supply. A 2025 Hydro Tasmania annual report excerpt indicates site rehabilitation provisioning for Bell Bay plant and Tamar Valley Power Station at end of useful life. A third-party NEMStats result listed an expected closure date of 2025-07-02 while also listing the unit in service; this was treated as a warning rather than relied on because AEMO 2025-26 MLF documents still list BBTHREE2.
[AI 2026-06-04] Bell Bay Three comprises the three pre-existing Pratt & Whitney FT8 Twin Pac OCGT units at Tamar Valley Power Station. BBTHREE2 is treated as one 40 MW FT8 unit; exact mapping to the AER equipment labels is inferred as Unit 102/Unit 102A-102B. No source-backed original construction cost for BBTHREE2 was found. The capex value used is an estimated one-third allocation of the reported 2007 Alinta purchase of the Bell Bay site and three gas turbines for A$75 million; this is an acquisition/value allocation including site and gas pipeline capacity agreements, not a pure construction EPC cost. Fixed and variable O&M, heat rate, efficiency, capex replacement benchmarks and asset life are technology defaults from the Aurecon 2024 Energy Technology Cost and Parameters Review for AEMO, using the small aero-derivative OCGT case. Emissions intensity is calculated as heat rate 9.373 GJ/MWh multiplied by the 2025 NGA Factors natural gas pipeline Scope 1 combined-gases factor of 51.53 kg CO2-e/GJ. Major operating notes: 2023-24 AER states Unit 102A and Unit 102B were tested; Units 101 and 102 were used sparingly; a late-June 2024 lightning strike damaged all units. Unit 103A was not operational and Unit 103B had been out of service since 2018, which affects the wider Bell Bay Three station but not necessarily BBTHREE2 directly.
[AI 2026-06-04] BBTHREE2 is one of three Pratt & Whitney FT8 Twin Pac OCGT units at Tamar Valley / Bell Bay Three. Official owner material confirms 3 x 40 MW FT8 Twin Pac OCGT within the 386 MW Tamar Valley Power Station. Exact original 2006 construction/acquisition cost for BBTHREE2 was not found. The capex value is a pro-rata allocation of a reported March 2007 AUD 75 million Alinta purchase of the 105 MW Bell Bay peaking plant site, which included gas pipeline capacity agreements; it is therefore not a pure construction cost and is marked estimated. Fixed O&M is a generic OCGT assumption from ACIL Tasman/QCA, applied to 40 MW. Variable O&M, fuel cost, thermal efficiency and emissions intensity are Bell Bay Three-specific modelling assumptions from ACIL Tasman 2009/2010. Heat rate is AEMO-specific for Bell Bay Three. Hydro Tasmania annual reporting notes site rehabilitation provisions for demolition/remediation of Bell Bay plant and Tamar Valley Power Station at end of useful life, but no BBTHREE2 closure year was found in the searched public sources.
[AI 2026-06-04] Bell Bay Three is part of Hydro Tasmania's Tamar Valley Power Station complex. Hydro Tasmania identifies the OCGT fleet as 3 x 40 MW Pratt & Whitney FT8 Twin Pac units plus a 58 MW Rolls Royce Trent. Exact original construction/purchase capex for BBTHREE2 was not found; the available official 2016 background document says the three FT8 units were originally purchased by Hydro Tasmania for energy supply mitigation before Basslink, were second-hand, and were approaching end of life. Capex, fixed O&M, variable O&M, heat rate, efficiency and asset life are therefore default estimates using AEMO/Aurecon 2024 small OCGT assumptions, scaled to the 40 MW DUID. Emissions intensity is calculated as 9.373 GJ/MWh LHV heat rate multiplied by 51.53 kg CO2-e/GJ natural gas Scope 1 factor. AER operating notes indicate intermittent/sparing OCGT operation, ongoing NOx investigations on Pratt & Whitney units, and a February 2025 NOx exceedance on Unit 102B; BBTHREE2 is inferred to correspond to the second FT8 Twin Pac/Unit 102, but this unit mapping should be verified with plant records.
[AI 2026-06-04] Bell Bay Three comprises three gas turbine units. The reported construction/project cost found is for all three 38.75 MVA gas turbine units installed by Bell Bay Three Pty Ltd in 2005-06 at A$52.409 million; the capex_total_aud shown for BBTHREE2 is a one-third allocation of that reported total and uses the user-supplied 40 MW capacity for per-MW calculation. O&M, asset-life and generic max-load heat-rate/efficiency assumptions are based on AEMO/Aurecon/GHD small OCGT or AEMO existing-generator assumptions, not BBTHREE2 owner-reported accounts. AEMO heat-rate data gives Bell Bay Three static heat rate 12.04 GJ/MWh HHV and variable heat-rate parameters of 108.79 GJ/h base and 9.32 GJ/MWh incremental. Emissions intensity is calculated as 12.04 GJ/MWh multiplied by 51.53 kgCO2-e/GJ for natural gas distributed in a pipeline. AEMO/AEMC material indicates Bell Bay Three had an announced withdrawal intention around 2015 that was later rescinded; AEMO 2025-26 marginal-loss-factor data still lists BBTHREE2 at the Bell Bay Three No.2 connection point. No unit-specific major refurbishment cost was found.
Model: gpt-5.5 · Reasoning: medium · Fetched 04 Jun 2026 09:09 · ID: resp_033f3080664f3794006a20b3ab6b4481958a2e81893fb13711
{
"generator_identity": {
"site_name": "Bell Bay Three",
"duid": "BBTHREE2",
"owner": "AETV Pty Ltd",
"region": "TAS",
"technology_type": "Turbine - OCGT",
"fuel_type": "Fossil - Natural Gas Pipeline"
},
"financial_profile": {
"generator_type_normalised": "ocgt",
"capex_total_aud": 17469666.67,
"capex_year": 2006,
"capex_basis": "estimated",
"capex_per_mw_aud": 436741.67,
"capex_per_mwh_aud": null,
"fixed_opex_annual_aud": 694720,
"fixed_opex_per_mw_year_aud": 17368,
"variable_opex_per_mwh_aud": 16.1,
"fuel_cost_per_gj_aud": 10.06,
"fuel_contract_notes": "No current BBTHREE2-specific fuel commodity or transport contract price was found. Bell Bay Three is supplied by natural gas pipeline through the Bell Bay/Tamar Valley gas infrastructure. Hydro Tasmania/AETV historically had gas transportation and connection arrangements, and later Hydro had a take-or-pay agreement with the Tasmanian Gas Pipeline expiring at end-2017. The fuel-cost value used here is a stale AEMO/ACIL Allen modelling proxy: 2014 medium-case delivered gas projection for OCGT Bell Bay Three in FY2024-25, real 2014-15 AUD/GJ, including an OCGT peaker mark-up; it is not a reported contract price.",
"heat_rate_gj_per_mwh": 12.04,
"efficiency_pct": 29.9,
"emissions_intensity_tco2_mwh": 0.62,
"asset_life_years": 25,
"discount_rate_pct": null,
"source_confidence": "medium",
"data_status": "partially_verified",
"notes": "Bell Bay Three comprises three gas turbine units. The reported construction/project cost found is for all three 38.75 MVA gas turbine units installed by Bell Bay Three Pty Ltd in 2005-06 at A$52.409 million; the capex_total_aud shown for BBTHREE2 is a one-third allocation of that reported total and uses the user-supplied 40 MW capacity for per-MW calculation. O&M, asset-life and generic max-load heat-rate/efficiency assumptions are based on AEMO/Aurecon/GHD small OCGT or AEMO existing-generator assumptions, not BBTHREE2 owner-reported accounts. AEMO heat-rate data gives Bell Bay Three static heat rate 12.04 GJ/MWh HHV and variable heat-rate parameters of 108.79 GJ/h base and 9.32 GJ/MWh incremental. Emissions intensity is calculated as 12.04 GJ/MWh multiplied by 51.53 kgCO2-e/GJ for natural gas distributed in a pipeline. AEMO/AEMC material indicates Bell Bay Three had an announced withdrawal intention around 2015 that was later rescinded; AEMO 2025-26 marginal-loss-factor data still lists BBTHREE2 at the Bell Bay Three No.2 connection point. No unit-specific major refurbishment cost was found."
},
"sources": [
{
"field_name": "capex_total_aud",
"value_text": "A$52.409m reported project cost for three 38.75 MVA gas turbine units; BBTHREE2 value is allocated one-third = A$17.4697m",
"value_numeric": 17469666.67,
"unit": "AUD",
"source_url": "https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf",
"source_title": "Government Departments and Public Bodies 2005-2006 Executive Summary",
"publisher": "Tasmanian Audit Office",
"published_date": "2006-11",
"confidence": "high",
"raw_excerpt": "Bell Bay Three Pty Ltd – this company was incorporated on 7 December 2005. It constructed three 38.75MVA gas turbine units during the 2005-06 financial year that have since been commissioned. The turbines were installed at a project cost of $52.409m.",
"ai_summary": "Official Tasmanian public audit report provides the nominal project cost and scope for the three Bell Bay Three gas turbine units; BBTHREE2 allocation is estimated pro rata."
},
{
"field_name": "capex_year",
"value_text": "Constructed during 2005-06 financial year; commissioned after construction",
"value_numeric": 2006,
"unit": "year",
"source_url": "https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf",
"source_title": "Government Departments and Public Bodies 2005-2006 Executive Summary",
"publisher": "Tasmanian Audit Office",
"published_date": "2006-11",
"confidence": "high",
"raw_excerpt": "It constructed three 38.75MVA gas turbine units during the 2005-06 financial year that have since been commissioned.",
"ai_summary": "Capex year is assigned to FY2005-06, represented as 2006 for nominal cost vintage."
},
{
"field_name": "capex_per_mw_aud",
"value_text": "A$17.4697m allocated capex divided by user-supplied 40 MW capacity",
"value_numeric": 436741.67,
"unit": "AUD/MW",
"source_url": "https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf",
"source_title": "Government Departments and Public Bodies 2005-2006 Executive Summary",
"publisher": "Tasmanian Audit Office",
"published_date": "2006-11",
"confidence": "medium",
"raw_excerpt": "The turbines were installed at a project cost of $52.409m.",
"ai_summary": "Per-MW value is derived from reported three-unit total cost, allocated one-third to BBTHREE2 and divided by 40 MW."
},
{
"field_name": "fixed_opex_per_mw_year_aud",
"value_text": "Generic small OCGT fixed O&M cost, excluding fuel: A$17,368/MW-year",
"value_numeric": 17368,
"unit": "AUD/MW-year",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf",
"source_title": "2024 Energy Technology Cost and Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2025-05-09",
"confidence": "medium",
"raw_excerpt": "OPEX – Annual (excluding fuel) Fixed O&M Cost $ / MW (Net) 17,368 14,066 Based on Aurecon internal database.",
"ai_summary": "Bell Bay Three is a small aero-derivative OCGT-type asset; the small-GT generic fixed O&M assumption is used as a default."
},
{
"field_name": "fixed_opex_annual_aud",
"value_text": "A$17,368/MW-year multiplied by 40 MW = A$694,720/year",
"value_numeric": 694720,
"unit": "AUD/year",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf",
"source_title": "2024 Energy Technology Cost and Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2025-05-09",
"confidence": "medium",
"raw_excerpt": "Fixed O&M Cost $ / MW (Net) 17,368 ... Variable O&M Cost $ / MWh (Net) 16.1 ... OPEX – Annual (excluding fuel).",
"ai_summary": "Annual fixed O&M is calculated from the generic small-GT fixed O&M rate and the stated 40 MW capacity."
},
{
"field_name": "variable_opex_per_mwh_aud",
"value_text": "Generic small OCGT variable O&M cost, excluding fuel: A$16.1/MWh",
"value_numeric": 16.1,
"unit": "AUD/MWh",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf",
"source_title": "2024 Energy Technology Cost and Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2025-05-09",
"confidence": "medium",
"raw_excerpt": "Variable O&M Cost $ / MWh (Net) 16.1 8.1 Based on Aurecon internal database. Impact of hydrogen blend combustion on maintenance schedule not considered.",
"ai_summary": "Generic small-GT variable O&M assumption is used because unit-specific owner O&M was not located."
},
{
"field_name": "fuel_cost_per_gj_aud",
"value_text": "AEMO/ACIL Allen medium-case projected gas price for OCGT Bell Bay Three FY2024-25: A$10.06/GJ real 2014-15",
"value_numeric": 10.06,
"unit": "AUD/GJ",
"source_url": "https://wa.aemo.com.au/-/media/files/electricity/nem/planning_and_forecasting/ntndp/2014/data-sources/fuel_and_technology_cost_review_report_acil_allen.pdf",
"source_title": "Fuel and Technology Cost Review Final Report",
"publisher": "ACIL Allen Consulting for AEMO",
"published_date": "2014",
"confidence": "medium",
"raw_excerpt": "OCGT Bell Bay Three TAS TAS 6.81 7.54 8.38 8.54 8.62 9.01 9.45 9.74 9.81 9.88 10.06 10.25 10.37 10.53 10.81 11.02",
"ai_summary": "The 2024-25 medium-case modelled delivered gas price for Bell Bay Three is used as a proxy only; ACIL Allen applied node prices to generators irrespective of existing contracts and added A$2/GJ for peaking generators."
},
{
"field_name": "fuel_contract_notes",
"value_text": "Hydro had a take-or-pay agreement with TGP expiring at end-2017; current BBTHREE2 price not found",
"value_numeric": null,
"unit": null,
"source_url": "https://www.abc.net.au/news/2017-07-05/gas-deal-falls-through-in-tasmania/8680068",
"source_title": "Major Tasmanian industrials told they face 95 per cent price hike for gas after deal falls through",
"publisher": "ABC News",
"published_date": "2017-07-05",
"confidence": "medium",
"raw_excerpt": "Hydro Tasmania has a \"take or pay\" agreement with the Tasmanian Gas Pipeline (TGP) to import from Victoria across Bass Strait that expires at the end of the year.",
"ai_summary": "Reputable news reporting describes the then-existing Hydro/TGP gas transport arrangement and its expiry; this does not provide current BBTHREE2 fuel pricing."
},
{
"field_name": "fuel_contract_notes",
"value_text": "Bell Bay Meter Station/TGP modifications provide expanded fuel gas supply to TVPS and generators",
"value_numeric": null,
"unit": null,
"source_url": "https://www.economicregulator.tas.gov.au/Documents/TGP%20Construction%20Licence%20August%202010.pdf",
"source_title": "Gas Pipelines Act 2000 - TGP Construction Licence August 2010",
"publisher": "Office of the Tasmanian Economic Regulator",
"published_date": "2010-08",
"confidence": "high",
"raw_excerpt": "The construction work on the Tasmanian Gas Pipeline consists of modifications to the current Bell Bay Meter Station to provide an expanded fuel gas supply to the newly constructed and adjacent Tamar Valley Power Station (TVPS).",
"ai_summary": "Government regulator document confirms pipeline/meter-station scope for gas supply to the Bell Bay/Tamar Valley generation complex."
},
{
"field_name": "heat_rate_gj_per_mwh",
"value_text": "Bell Bay Three static heat rate 12.04 GJ/MWh HHV; variable heat-rate base 108.79 GJ/h and incremental 9.32 GJ/MWh",
"value_numeric": 12.04,
"unit": "GJ/MWh",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf",
"source_title": "AEMO Heat Rate Data",
"publisher": "AEMO",
"published_date": "2020",
"confidence": "high",
"raw_excerpt": "Heat rates Encapsulates the efficiency of thermal generators (as-generated, HHV) ... Bell Bay Three 12.04 108.79 9.32",
"ai_summary": "AEMO existing-generator heat-rate dataset provides Bell Bay Three heat-rate assumptions on an HHV as-generated basis."
},
{
"field_name": "efficiency_pct",
"value_text": "Calculated HHV efficiency = 3.6 / 12.04 = 29.9%",
"value_numeric": 29.9,
"unit": "%",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf",
"source_title": "AEMO Heat Rate Data",
"publisher": "AEMO",
"published_date": "2020",
"confidence": "medium",
"raw_excerpt": "Bell Bay Three 12.04 108.79 9.32",
"ai_summary": "Efficiency is calculated from AEMO static heat rate using 3.6 GJ per MWh electricity output."
},
{
"field_name": "emissions_intensity_tco2_mwh",
"value_text": "Calculated from 12.04 GJ/MWh HHV and 51.53 kgCO2-e/GJ natural gas pipeline factor = 0.620 tCO2-e/MWh",
"value_numeric": 0.62,
"unit": "tCO2/MWh",
"source_url": "https://www.dcceew.gov.au/sites/default/files/documents/national-greenhouse-account-factors-2025.pdf",
"source_title": "Australian National Greenhouse Accounts Factors 2025",
"publisher": "DCCEEW",
"published_date": "2025",
"confidence": "medium",
"raw_excerpt": "Fuel combusted Natural gas distributed in a pipeline ... Scope 1 Emission Factor ... Combined gases 51.53 kg CO2-e/GJ.",
"ai_summary": "NGA 2025 natural gas combustion factor combined with AEMO heat rate gives the estimated direct combustion emissions intensity."
},
{
"field_name": "asset_life_years",
"value_text": "Generic OCGT economic life 25 years; technical life 40 years",
"value_numeric": 25,
"unit": "years",
"source_url": "https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf",
"source_title": "2024 Energy Technology Cost and Parameters Review",
"publisher": "Aurecon for AEMO",
"published_date": "2025-05-09",
"confidence": "medium",
"raw_excerpt": "Economic Life (Design Life) Years 25 25 Can be capacity factor dependent. Technical Life (Operational Life) Years 40 40.",
"ai_summary": "Generic OCGT design/economic life is used; actual Bell Bay Three has already operated for roughly two decades, so remaining life may differ."
},
{
"field_name": "major_refurbishment_or_closure_notes",
"value_text": "Previously announced withdrawal intention was rescinded",
"value_numeric": null,
"unit": null,
"source_url": "https://www.aemc.gov.au/sites/default/files/content/c8a0a093-4bf2-432b-8e7b-6157c58a3785/Annual-market-performance-review-final-report.pdf",
"source_title": "Annual Market Performance Review 2016 Final Report",
"publisher": "AEMC",
"published_date": "2016",
"confidence": "medium",
"raw_excerpt": "Bell Bay Three Power Station, a gas fired power station in Tasmania, announced the intention to withdraw but this announcement has since been rescinded.",
"ai_summary": "Market review notes an earlier withdrawal intention for Bell Bay Three was rescinded; no later permanent closure evidence was found in searched sources."
},
{
"field_name": "major_refurbishment_or_closure_notes",
"value_text": "BBTHREE2 listed in 2025-26 AEMO marginal loss factor table",
"value_numeric": null,
"unit": null,
"source_url": "https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/loss_factors_and_regional_boundaries/2025-26-marginal-loss-factors/marginal-loss-factors-for-the-2025-26-fin-year.pdf",
"source_title": "Marginal Loss Factors for the 2025-26 Financial Year",
"publisher": "AEMO",
"published_date": "2025",
"confidence": "high",
"raw_excerpt": "Bell Bay Three No.2 ... 110 ... BBTHREE2 ... TBB12 ... 2025-26 MLF 0.9986 ... 2024-25 0.9977.",
"ai_summary": "AEMO current loss-factor data indicates BBTHREE2 remains listed as a NEM generator connection point for FY2025-26."
},
{
"field_name": "technology_and_capacity_context",
"value_text": "Bell Bay Three included in AEMO gas-powered generation forecasts as OCGT, natural gas pipeline, scheduled, installed capacity 120 MW",
"value_numeric": 120,
"unit": "MW",
"source_url": "https://www.aemo.com.au/-/media/files/gas/national_planning_and_forecasting/ngfr/2015/2015-national-gas-forecasting-report-v20--2-march-2016.pdf",
"source_title": "2015 National Gas Forecasting Report",
"publisher": "AEMO",
"published_date": "2016-03-02",
"confidence": "high",
"raw_excerpt": "Power station | Bell Bay Three | Installed capacity (MW) 120 | Plant type | OCGT | Fuel | Natural Gas Pipeline | Dispatch type | Scheduled",
"ai_summary": "AEMO confirms Bell Bay Three technology/fuel/dispatch classification and total station capacity for the three-unit plant."
},
{
"field_name": "technology_and_operating_context",
"value_text": "AETV incident report describes BBTHREE1, BBTHREE2 and BBTHREE3 being brought online and then tripping due to loss of gas pressure in shared supply controlled by Bell Bay Metering Station PLC",
"value_numeric": null,
"unit": null,
"source_url": "https://wa.aemo.com.au/-/media/Files/Electricity/NEM/Market_Notices_and_Events/Power_System_Incident_Reports/2009/0232-0035-pdf.pdf",
"source_title": "Power System Incident Report – Simultaneous trip of AETV CCGT and OCGT units on 30/09/2009",
"publisher": "AEMO",
"published_date": "2009",
"confidence": "high",
"raw_excerpt": "Bell Bay Three generating units (BBTHREE1, BBTHREE2 and BBTHREE3) were not in service ... They were fed from a separate gas supply which was also controlled by the failed main PLC.",
"ai_summary": "AEMO incident report confirms the BBTHREE DUID group and gas-supply dependency at the Bell Bay/Tamar Valley site."
}
],
"warnings": [
"Exact BBTHREE2-only construction cost was not found; capex_total_aud is a pro-rata allocation from a reported three-unit project cost.",
"Current fuel contract price and current delivered gas cost for BBTHREE2 were not found; fuel_cost_per_gj_aud is an old AEMO/ACIL modelling proxy in real 2014-15 dollars, not a reported current contract value.",
"Fixed O&M, variable O&M and asset life are generic AEMO/Aurecon small-OCGT assumptions, not owner-reported Bell Bay Three accounts.",
"Emissions intensity is calculated from AEMO heat rate and NGA natural-gas factor; no BBTHREE2 measured emissions intensity was found.",
"No source-backed unit-specific major refurbishment cost was located."
]
}
{
"meta": {
"model": "gpt-5.5",
"reasoning_effort": "medium",
"response_id": "resp_033f3080664f3794006a20b3ab6b4481958a2e81893fb13711",
"fetched_at": "2026-06-04T09:09:17+10:00"
},
"raw_text": "{\"generator_identity\":{\"site_name\":\"Bell Bay Three\",\"duid\":\"BBTHREE2\",\"owner\":\"AETV Pty Ltd\",\"region\":\"TAS\",\"technology_type\":\"Turbine - OCGT\",\"fuel_type\":\"Fossil - Natural Gas Pipeline\"},\"financial_profile\":{\"generator_type_normalised\":\"ocgt\",\"capex_total_aud\":17469666.67,\"capex_year\":2006,\"capex_basis\":\"estimated\",\"capex_per_mw_aud\":436741.67,\"capex_per_mwh_aud\":null,\"fixed_opex_annual_aud\":694720,\"fixed_opex_per_mw_year_aud\":17368,\"variable_opex_per_mwh_aud\":16.1,\"fuel_cost_per_gj_aud\":10.06,\"fuel_contract_notes\":\"No current BBTHREE2-specific fuel commodity or transport contract price was found. Bell Bay Three is supplied by natural gas pipeline through the Bell Bay/Tamar Valley gas infrastructure. Hydro Tasmania/AETV historically had gas transportation and connection arrangements, and later Hydro had a take-or-pay agreement with the Tasmanian Gas Pipeline expiring at end-2017. The fuel-cost value used here is a stale AEMO/ACIL Allen modelling proxy: 2014 medium-case delivered gas projection for OCGT Bell Bay Three in FY2024-25, real 2014-15 AUD/GJ, including an OCGT peaker mark-up; it is not a reported contract price.\",\"heat_rate_gj_per_mwh\":12.04,\"efficiency_pct\":29.9,\"emissions_intensity_tco2_mwh\":0.62,\"asset_life_years\":25,\"discount_rate_pct\":null,\"source_confidence\":\"medium\",\"data_status\":\"partially_verified\",\"notes\":\"Bell Bay Three comprises three gas turbine units. The reported construction/project cost found is for all three 38.75 MVA gas turbine units installed by Bell Bay Three Pty Ltd in 2005-06 at A$52.409 million; the capex_total_aud shown for BBTHREE2 is a one-third allocation of that reported total and uses the user-supplied 40 MW capacity for per-MW calculation. O&M, asset-life and generic max-load heat-rate/efficiency assumptions are based on AEMO/Aurecon/GHD small OCGT or AEMO existing-generator assumptions, not BBTHREE2 owner-reported accounts. AEMO heat-rate data gives Bell Bay Three static heat rate 12.04 GJ/MWh HHV and variable heat-rate parameters of 108.79 GJ/h base and 9.32 GJ/MWh incremental. Emissions intensity is calculated as 12.04 GJ/MWh multiplied by 51.53 kgCO2-e/GJ for natural gas distributed in a pipeline. AEMO/AEMC material indicates Bell Bay Three had an announced withdrawal intention around 2015 that was later rescinded; AEMO 2025-26 marginal-loss-factor data still lists BBTHREE2 at the Bell Bay Three No.2 connection point. No unit-specific major refurbishment cost was found.\"},\"sources\":[{\"field_name\":\"capex_total_aud\",\"value_text\":\"A$52.409m reported project cost for three 38.75 MVA gas turbine units; BBTHREE2 value is allocated one-third = A$17.4697m\",\"value_numeric\":17469666.67,\"unit\":\"AUD\",\"source_url\":\"https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf\",\"source_title\":\"Government Departments and Public Bodies 2005-2006 Executive Summary\",\"publisher\":\"Tasmanian Audit Office\",\"published_date\":\"2006-11\",\"confidence\":\"high\",\"raw_excerpt\":\"Bell Bay Three Pty Ltd – this company was incorporated on 7 December 2005. It constructed three 38.75MVA gas turbine units during the 2005-06 financial year that have since been commissioned. The turbines were installed at a project cost of $52.409m.\",\"ai_summary\":\"Official Tasmanian public audit report provides the nominal project cost and scope for the three Bell Bay Three gas turbine units; BBTHREE2 allocation is estimated pro rata.\"},{\"field_name\":\"capex_year\",\"value_text\":\"Constructed during 2005-06 financial year; commissioned after construction\",\"value_numeric\":2006,\"unit\":\"year\",\"source_url\":\"https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf\",\"source_title\":\"Government Departments and Public Bodies 2005-2006 Executive Summary\",\"publisher\":\"Tasmanian Audit Office\",\"published_date\":\"2006-11\",\"confidence\":\"high\",\"raw_excerpt\":\"It constructed three 38.75MVA gas turbine units during the 2005-06 financial year that have since been commissioned.\",\"ai_summary\":\"Capex year is assigned to FY2005-06, represented as 2006 for nominal cost vintage.\"},{\"field_name\":\"capex_per_mw_aud\",\"value_text\":\"A$17.4697m allocated capex divided by user-supplied 40 MW capacity\",\"value_numeric\":436741.67,\"unit\":\"AUD/MW\",\"source_url\":\"https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf\",\"source_title\":\"Government Departments and Public Bodies 2005-2006 Executive Summary\",\"publisher\":\"Tasmanian Audit Office\",\"published_date\":\"2006-11\",\"confidence\":\"medium\",\"raw_excerpt\":\"The turbines were installed at a project cost of $52.409m.\",\"ai_summary\":\"Per-MW value is derived from reported three-unit total cost, allocated one-third to BBTHREE2 and divided by 40 MW.\"},{\"field_name\":\"fixed_opex_per_mw_year_aud\",\"value_text\":\"Generic small OCGT fixed O&M cost, excluding fuel: A$17,368/MW-year\",\"value_numeric\":17368,\"unit\":\"AUD/MW-year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"OPEX – Annual (excluding fuel) Fixed O&M Cost $ / MW (Net) 17,368 14,066 Based on Aurecon internal database.\",\"ai_summary\":\"Bell Bay Three is a small aero-derivative OCGT-type asset; the small-GT generic fixed O&M assumption is used as a default.\"},{\"field_name\":\"fixed_opex_annual_aud\",\"value_text\":\"A$17,368/MW-year multiplied by 40 MW = A$694,720/year\",\"value_numeric\":694720,\"unit\":\"AUD/year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fixed O&M Cost $ / MW (Net) 17,368 ... Variable O&M Cost $ / MWh (Net) 16.1 ... OPEX – Annual (excluding fuel).\",\"ai_summary\":\"Annual fixed O&M is calculated from the generic small-GT fixed O&M rate and the stated 40 MW capacity.\"},{\"field_name\":\"variable_opex_per_mwh_aud\",\"value_text\":\"Generic small OCGT variable O&M cost, excluding fuel: A$16.1/MWh\",\"value_numeric\":16.1,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"Variable O&M Cost $ / MWh (Net) 16.1 8.1 Based on Aurecon internal database. Impact of hydrogen blend combustion on maintenance schedule not considered.\",\"ai_summary\":\"Generic small-GT variable O&M assumption is used because unit-specific owner O&M was not located.\"},{\"field_name\":\"fuel_cost_per_gj_aud\",\"value_text\":\"AEMO/ACIL Allen medium-case projected gas price for OCGT Bell Bay Three FY2024-25: A$10.06/GJ real 2014-15\",\"value_numeric\":10.06,\"unit\":\"AUD/GJ\",\"source_url\":\"https://wa.aemo.com.au/-/media/files/electricity/nem/planning_and_forecasting/ntndp/2014/data-sources/fuel_and_technology_cost_review_report_acil_allen.pdf\",\"source_title\":\"Fuel and Technology Cost Review Final Report\",\"publisher\":\"ACIL Allen Consulting for AEMO\",\"published_date\":\"2014\",\"confidence\":\"medium\",\"raw_excerpt\":\"OCGT Bell Bay Three TAS TAS 6.81 7.54 8.38 8.54 8.62 9.01 9.45 9.74 9.81 9.88 10.06 10.25 10.37 10.53 10.81 11.02\",\"ai_summary\":\"The 2024-25 medium-case modelled delivered gas price for Bell Bay Three is used as a proxy only; ACIL Allen applied node prices to generators irrespective of existing contracts and added A$2/GJ for peaking generators.\"},{\"field_name\":\"fuel_contract_notes\",\"value_text\":\"Hydro had a take-or-pay agreement with TGP expiring at end-2017; current BBTHREE2 price not found\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.abc.net.au/news/2017-07-05/gas-deal-falls-through-in-tasmania/8680068\",\"source_title\":\"Major Tasmanian industrials told they face 95 per cent price hike for gas after deal falls through\",\"publisher\":\"ABC News\",\"published_date\":\"2017-07-05\",\"confidence\":\"medium\",\"raw_excerpt\":\"Hydro Tasmania has a \\\"take or pay\\\" agreement with the Tasmanian Gas Pipeline (TGP) to import from Victoria across Bass Strait that expires at the end of the year.\",\"ai_summary\":\"Reputable news reporting describes the then-existing Hydro/TGP gas transport arrangement and its expiry; this does not provide current BBTHREE2 fuel pricing.\"},{\"field_name\":\"fuel_contract_notes\",\"value_text\":\"Bell Bay Meter Station/TGP modifications provide expanded fuel gas supply to TVPS and generators\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.economicregulator.tas.gov.au/Documents/TGP%20Construction%20Licence%20August%202010.pdf\",\"source_title\":\"Gas Pipelines Act 2000 - TGP Construction Licence August 2010\",\"publisher\":\"Office of the Tasmanian Economic Regulator\",\"published_date\":\"2010-08\",\"confidence\":\"high\",\"raw_excerpt\":\"The construction work on the Tasmanian Gas Pipeline consists of modifications to the current Bell Bay Meter Station to provide an expanded fuel gas supply to the newly constructed and adjacent Tamar Valley Power Station (TVPS).\",\"ai_summary\":\"Government regulator document confirms pipeline/meter-station scope for gas supply to the Bell Bay/Tamar Valley generation complex.\"},{\"field_name\":\"heat_rate_gj_per_mwh\",\"value_text\":\"Bell Bay Three static heat rate 12.04 GJ/MWh HHV; variable heat-rate base 108.79 GJ/h and incremental 9.32 GJ/MWh\",\"value_numeric\":12.04,\"unit\":\"GJ/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2020\",\"confidence\":\"high\",\"raw_excerpt\":\"Heat rates Encapsulates the efficiency of thermal generators (as-generated, HHV) ... Bell Bay Three 12.04 108.79 9.32\",\"ai_summary\":\"AEMO existing-generator heat-rate dataset provides Bell Bay Three heat-rate assumptions on an HHV as-generated basis.\"},{\"field_name\":\"efficiency_pct\",\"value_text\":\"Calculated HHV efficiency = 3.6 / 12.04 = 29.9%\",\"value_numeric\":29.9,\"unit\":\"%\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2020\",\"confidence\":\"medium\",\"raw_excerpt\":\"Bell Bay Three 12.04 108.79 9.32\",\"ai_summary\":\"Efficiency is calculated from AEMO static heat rate using 3.6 GJ per MWh electricity output.\"},{\"field_name\":\"emissions_intensity_tco2_mwh\",\"value_text\":\"Calculated from 12.04 GJ/MWh HHV and 51.53 kgCO2-e/GJ natural gas pipeline factor = 0.620 tCO2-e/MWh\",\"value_numeric\":0.62,\"unit\":\"tCO2/MWh\",\"source_url\":\"https://www.dcceew.gov.au/sites/default/files/documents/national-greenhouse-account-factors-2025.pdf\",\"source_title\":\"Australian National Greenhouse Accounts Factors 2025\",\"publisher\":\"DCCEEW\",\"published_date\":\"2025\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fuel combusted Natural gas distributed in a pipeline ... Scope 1 Emission Factor ... Combined gases 51.53 kg CO2-e/GJ.\",\"ai_summary\":\"NGA 2025 natural gas combustion factor combined with AEMO heat rate gives the estimated direct combustion emissions intensity.\"},{\"field_name\":\"asset_life_years\",\"value_text\":\"Generic OCGT economic life 25 years; technical life 40 years\",\"value_numeric\":25,\"unit\":\"years\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"Economic Life (Design Life) Years 25 25 Can be capacity factor dependent. Technical Life (Operational Life) Years 40 40.\",\"ai_summary\":\"Generic OCGT design/economic life is used; actual Bell Bay Three has already operated for roughly two decades, so remaining life may differ.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"Previously announced withdrawal intention was rescinded\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.aemc.gov.au/sites/default/files/content/c8a0a093-4bf2-432b-8e7b-6157c58a3785/Annual-market-performance-review-final-report.pdf\",\"source_title\":\"Annual Market Performance Review 2016 Final Report\",\"publisher\":\"AEMC\",\"published_date\":\"2016\",\"confidence\":\"medium\",\"raw_excerpt\":\"Bell Bay Three Power Station, a gas fired power station in Tasmania, announced the intention to withdraw but this announcement has since been rescinded.\",\"ai_summary\":\"Market review notes an earlier withdrawal intention for Bell Bay Three was rescinded; no later permanent closure evidence was found in searched sources.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"BBTHREE2 listed in 2025-26 AEMO marginal loss factor table\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/loss_factors_and_regional_boundaries/2025-26-marginal-loss-factors/marginal-loss-factors-for-the-2025-26-fin-year.pdf\",\"source_title\":\"Marginal Loss Factors for the 2025-26 Financial Year\",\"publisher\":\"AEMO\",\"published_date\":\"2025\",\"confidence\":\"high\",\"raw_excerpt\":\"Bell Bay Three No.2 ... 110 ... BBTHREE2 ... TBB12 ... 2025-26 MLF 0.9986 ... 2024-25 0.9977.\",\"ai_summary\":\"AEMO current loss-factor data indicates BBTHREE2 remains listed as a NEM generator connection point for FY2025-26.\"},{\"field_name\":\"technology_and_capacity_context\",\"value_text\":\"Bell Bay Three included in AEMO gas-powered generation forecasts as OCGT, natural gas pipeline, scheduled, installed capacity 120 MW\",\"value_numeric\":120,\"unit\":\"MW\",\"source_url\":\"https://www.aemo.com.au/-/media/files/gas/national_planning_and_forecasting/ngfr/2015/2015-national-gas-forecasting-report-v20--2-march-2016.pdf\",\"source_title\":\"2015 National Gas Forecasting Report\",\"publisher\":\"AEMO\",\"published_date\":\"2016-03-02\",\"confidence\":\"high\",\"raw_excerpt\":\"Power station | Bell Bay Three | Installed capacity (MW) 120 | Plant type | OCGT | Fuel | Natural Gas Pipeline | Dispatch type | Scheduled\",\"ai_summary\":\"AEMO confirms Bell Bay Three technology/fuel/dispatch classification and total station capacity for the three-unit plant.\"},{\"field_name\":\"technology_and_operating_context\",\"value_text\":\"AETV incident report describes BBTHREE1, BBTHREE2 and BBTHREE3 being brought online and then tripping due to loss of gas pressure in shared supply controlled by Bell Bay Metering Station PLC\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://wa.aemo.com.au/-/media/Files/Electricity/NEM/Market_Notices_and_Events/Power_System_Incident_Reports/2009/0232-0035-pdf.pdf\",\"source_title\":\"Power System Incident Report – Simultaneous trip of AETV CCGT and OCGT units on 30/09/2009\",\"publisher\":\"AEMO\",\"published_date\":\"2009\",\"confidence\":\"high\",\"raw_excerpt\":\"Bell Bay Three generating units (BBTHREE1, BBTHREE2 and BBTHREE3) were not in service ... They were fed from a separate gas supply which was also controlled by the failed main PLC.\",\"ai_summary\":\"AEMO incident report confirms the BBTHREE DUID group and gas-supply dependency at the Bell Bay/Tamar Valley site.\"}],\"warnings\":[\"Exact BBTHREE2-only construction cost was not found; capex_total_aud is a pro-rata allocation from a reported three-unit project cost.\",\"Current fuel contract price and current delivered gas cost for BBTHREE2 were not found; fuel_cost_per_gj_aud is an old AEMO/ACIL modelling proxy in real 2014-15 dollars, not a reported current contract value.\",\"Fixed O&M, variable O&M and asset life are generic AEMO/Aurecon small-OCGT assumptions, not owner-reported Bell Bay Three accounts.\",\"Emissions intensity is calculated from AEMO heat rate and NGA natural-gas factor; no BBTHREE2 measured emissions intensity was found.\",\"No source-backed unit-specific major refurbishment cost was located.\"]}",
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"text": "{\"generator_identity\":{\"site_name\":\"Bell Bay Three\",\"duid\":\"BBTHREE2\",\"owner\":\"AETV Pty Ltd\",\"region\":\"TAS\",\"technology_type\":\"Turbine - OCGT\",\"fuel_type\":\"Fossil - Natural Gas Pipeline\"},\"financial_profile\":{\"generator_type_normalised\":\"ocgt\",\"capex_total_aud\":17469666.67,\"capex_year\":2006,\"capex_basis\":\"estimated\",\"capex_per_mw_aud\":436741.67,\"capex_per_mwh_aud\":null,\"fixed_opex_annual_aud\":694720,\"fixed_opex_per_mw_year_aud\":17368,\"variable_opex_per_mwh_aud\":16.1,\"fuel_cost_per_gj_aud\":10.06,\"fuel_contract_notes\":\"No current BBTHREE2-specific fuel commodity or transport contract price was found. Bell Bay Three is supplied by natural gas pipeline through the Bell Bay/Tamar Valley gas infrastructure. Hydro Tasmania/AETV historically had gas transportation and connection arrangements, and later Hydro had a take-or-pay agreement with the Tasmanian Gas Pipeline expiring at end-2017. The fuel-cost value used here is a stale AEMO/ACIL Allen modelling proxy: 2014 medium-case delivered gas projection for OCGT Bell Bay Three in FY2024-25, real 2014-15 AUD/GJ, including an OCGT peaker mark-up; it is not a reported contract price.\",\"heat_rate_gj_per_mwh\":12.04,\"efficiency_pct\":29.9,\"emissions_intensity_tco2_mwh\":0.62,\"asset_life_years\":25,\"discount_rate_pct\":null,\"source_confidence\":\"medium\",\"data_status\":\"partially_verified\",\"notes\":\"Bell Bay Three comprises three gas turbine units. The reported construction/project cost found is for all three 38.75 MVA gas turbine units installed by Bell Bay Three Pty Ltd in 2005-06 at A$52.409 million; the capex_total_aud shown for BBTHREE2 is a one-third allocation of that reported total and uses the user-supplied 40 MW capacity for per-MW calculation. O&M, asset-life and generic max-load heat-rate/efficiency assumptions are based on AEMO/Aurecon/GHD small OCGT or AEMO existing-generator assumptions, not BBTHREE2 owner-reported accounts. AEMO heat-rate data gives Bell Bay Three static heat rate 12.04 GJ/MWh HHV and variable heat-rate parameters of 108.79 GJ/h base and 9.32 GJ/MWh incremental. Emissions intensity is calculated as 12.04 GJ/MWh multiplied by 51.53 kgCO2-e/GJ for natural gas distributed in a pipeline. AEMO/AEMC material indicates Bell Bay Three had an announced withdrawal intention around 2015 that was later rescinded; AEMO 2025-26 marginal-loss-factor data still lists BBTHREE2 at the Bell Bay Three No.2 connection point. No unit-specific major refurbishment cost was found.\"},\"sources\":[{\"field_name\":\"capex_total_aud\",\"value_text\":\"A$52.409m reported project cost for three 38.75 MVA gas turbine units; BBTHREE2 value is allocated one-third = A$17.4697m\",\"value_numeric\":17469666.67,\"unit\":\"AUD\",\"source_url\":\"https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf\",\"source_title\":\"Government Departments and Public Bodies 2005-2006 Executive Summary\",\"publisher\":\"Tasmanian Audit Office\",\"published_date\":\"2006-11\",\"confidence\":\"high\",\"raw_excerpt\":\"Bell Bay Three Pty Ltd – this company was incorporated on 7 December 2005. It constructed three 38.75MVA gas turbine units during the 2005-06 financial year that have since been commissioned. The turbines were installed at a project cost of $52.409m.\",\"ai_summary\":\"Official Tasmanian public audit report provides the nominal project cost and scope for the three Bell Bay Three gas turbine units; BBTHREE2 allocation is estimated pro rata.\"},{\"field_name\":\"capex_year\",\"value_text\":\"Constructed during 2005-06 financial year; commissioned after construction\",\"value_numeric\":2006,\"unit\":\"year\",\"source_url\":\"https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf\",\"source_title\":\"Government Departments and Public Bodies 2005-2006 Executive Summary\",\"publisher\":\"Tasmanian Audit Office\",\"published_date\":\"2006-11\",\"confidence\":\"high\",\"raw_excerpt\":\"It constructed three 38.75MVA gas turbine units during the 2005-06 financial year that have since been commissioned.\",\"ai_summary\":\"Capex year is assigned to FY2005-06, represented as 2006 for nominal cost vintage.\"},{\"field_name\":\"capex_per_mw_aud\",\"value_text\":\"A$17.4697m allocated capex divided by user-supplied 40 MW capacity\",\"value_numeric\":436741.67,\"unit\":\"AUD/MW\",\"source_url\":\"https://www.audit.tas.gov.au/wp-content/uploads/2006-Government-Departments-and-Public-Bodies-2005-2006-Executive-Summary.pdf\",\"source_title\":\"Government Departments and Public Bodies 2005-2006 Executive Summary\",\"publisher\":\"Tasmanian Audit Office\",\"published_date\":\"2006-11\",\"confidence\":\"medium\",\"raw_excerpt\":\"The turbines were installed at a project cost of $52.409m.\",\"ai_summary\":\"Per-MW value is derived from reported three-unit total cost, allocated one-third to BBTHREE2 and divided by 40 MW.\"},{\"field_name\":\"fixed_opex_per_mw_year_aud\",\"value_text\":\"Generic small OCGT fixed O&M cost, excluding fuel: A$17,368/MW-year\",\"value_numeric\":17368,\"unit\":\"AUD/MW-year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"OPEX – Annual (excluding fuel) Fixed O&M Cost $ / MW (Net) 17,368 14,066 Based on Aurecon internal database.\",\"ai_summary\":\"Bell Bay Three is a small aero-derivative OCGT-type asset; the small-GT generic fixed O&M assumption is used as a default.\"},{\"field_name\":\"fixed_opex_annual_aud\",\"value_text\":\"A$17,368/MW-year multiplied by 40 MW = A$694,720/year\",\"value_numeric\":694720,\"unit\":\"AUD/year\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fixed O&M Cost $ / MW (Net) 17,368 ... Variable O&M Cost $ / MWh (Net) 16.1 ... OPEX – Annual (excluding fuel).\",\"ai_summary\":\"Annual fixed O&M is calculated from the generic small-GT fixed O&M rate and the stated 40 MW capacity.\"},{\"field_name\":\"variable_opex_per_mwh_aud\",\"value_text\":\"Generic small OCGT variable O&M cost, excluding fuel: A$16.1/MWh\",\"value_numeric\":16.1,\"unit\":\"AUD/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"Variable O&M Cost $ / MWh (Net) 16.1 8.1 Based on Aurecon internal database. Impact of hydrogen blend combustion on maintenance schedule not considered.\",\"ai_summary\":\"Generic small-GT variable O&M assumption is used because unit-specific owner O&M was not located.\"},{\"field_name\":\"fuel_cost_per_gj_aud\",\"value_text\":\"AEMO/ACIL Allen medium-case projected gas price for OCGT Bell Bay Three FY2024-25: A$10.06/GJ real 2014-15\",\"value_numeric\":10.06,\"unit\":\"AUD/GJ\",\"source_url\":\"https://wa.aemo.com.au/-/media/files/electricity/nem/planning_and_forecasting/ntndp/2014/data-sources/fuel_and_technology_cost_review_report_acil_allen.pdf\",\"source_title\":\"Fuel and Technology Cost Review Final Report\",\"publisher\":\"ACIL Allen Consulting for AEMO\",\"published_date\":\"2014\",\"confidence\":\"medium\",\"raw_excerpt\":\"OCGT Bell Bay Three TAS TAS 6.81 7.54 8.38 8.54 8.62 9.01 9.45 9.74 9.81 9.88 10.06 10.25 10.37 10.53 10.81 11.02\",\"ai_summary\":\"The 2024-25 medium-case modelled delivered gas price for Bell Bay Three is used as a proxy only; ACIL Allen applied node prices to generators irrespective of existing contracts and added A$2/GJ for peaking generators.\"},{\"field_name\":\"fuel_contract_notes\",\"value_text\":\"Hydro had a take-or-pay agreement with TGP expiring at end-2017; current BBTHREE2 price not found\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.abc.net.au/news/2017-07-05/gas-deal-falls-through-in-tasmania/8680068\",\"source_title\":\"Major Tasmanian industrials told they face 95 per cent price hike for gas after deal falls through\",\"publisher\":\"ABC News\",\"published_date\":\"2017-07-05\",\"confidence\":\"medium\",\"raw_excerpt\":\"Hydro Tasmania has a \\\"take or pay\\\" agreement with the Tasmanian Gas Pipeline (TGP) to import from Victoria across Bass Strait that expires at the end of the year.\",\"ai_summary\":\"Reputable news reporting describes the then-existing Hydro/TGP gas transport arrangement and its expiry; this does not provide current BBTHREE2 fuel pricing.\"},{\"field_name\":\"fuel_contract_notes\",\"value_text\":\"Bell Bay Meter Station/TGP modifications provide expanded fuel gas supply to TVPS and generators\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.economicregulator.tas.gov.au/Documents/TGP%20Construction%20Licence%20August%202010.pdf\",\"source_title\":\"Gas Pipelines Act 2000 - TGP Construction Licence August 2010\",\"publisher\":\"Office of the Tasmanian Economic Regulator\",\"published_date\":\"2010-08\",\"confidence\":\"high\",\"raw_excerpt\":\"The construction work on the Tasmanian Gas Pipeline consists of modifications to the current Bell Bay Meter Station to provide an expanded fuel gas supply to the newly constructed and adjacent Tamar Valley Power Station (TVPS).\",\"ai_summary\":\"Government regulator document confirms pipeline/meter-station scope for gas supply to the Bell Bay/Tamar Valley generation complex.\"},{\"field_name\":\"heat_rate_gj_per_mwh\",\"value_text\":\"Bell Bay Three static heat rate 12.04 GJ/MWh HHV; variable heat-rate base 108.79 GJ/h and incremental 9.32 GJ/MWh\",\"value_numeric\":12.04,\"unit\":\"GJ/MWh\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2020\",\"confidence\":\"high\",\"raw_excerpt\":\"Heat rates Encapsulates the efficiency of thermal generators (as-generated, HHV) ... Bell Bay Three 12.04 108.79 9.32\",\"ai_summary\":\"AEMO existing-generator heat-rate dataset provides Bell Bay Three heat-rate assumptions on an HHV as-generated basis.\"},{\"field_name\":\"efficiency_pct\",\"value_text\":\"Calculated HHV efficiency = 3.6 / 12.04 = 29.9%\",\"value_numeric\":29.9,\"unit\":\"%\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nsp_consultations/2020/aemo-heat-rate-data.pdf\",\"source_title\":\"AEMO Heat Rate Data\",\"publisher\":\"AEMO\",\"published_date\":\"2020\",\"confidence\":\"medium\",\"raw_excerpt\":\"Bell Bay Three 12.04 108.79 9.32\",\"ai_summary\":\"Efficiency is calculated from AEMO static heat rate using 3.6 GJ per MWh electricity output.\"},{\"field_name\":\"emissions_intensity_tco2_mwh\",\"value_text\":\"Calculated from 12.04 GJ/MWh HHV and 51.53 kgCO2-e/GJ natural gas pipeline factor = 0.620 tCO2-e/MWh\",\"value_numeric\":0.62,\"unit\":\"tCO2/MWh\",\"source_url\":\"https://www.dcceew.gov.au/sites/default/files/documents/national-greenhouse-account-factors-2025.pdf\",\"source_title\":\"Australian National Greenhouse Accounts Factors 2025\",\"publisher\":\"DCCEEW\",\"published_date\":\"2025\",\"confidence\":\"medium\",\"raw_excerpt\":\"Fuel combusted Natural gas distributed in a pipeline ... Scope 1 Emission Factor ... Combined gases 51.53 kg CO2-e/GJ.\",\"ai_summary\":\"NGA 2025 natural gas combustion factor combined with AEMO heat rate gives the estimated direct combustion emissions intensity.\"},{\"field_name\":\"asset_life_years\",\"value_text\":\"Generic OCGT economic life 25 years; technical life 40 years\",\"value_numeric\":25,\"unit\":\"years\",\"source_url\":\"https://www.aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2024/2025-iasr-scenarios/final-docs/aurecon-2024-energy-technology-cost-technical-parameter-review-report.pdf\",\"source_title\":\"2024 Energy Technology Cost and Parameters Review\",\"publisher\":\"Aurecon for AEMO\",\"published_date\":\"2025-05-09\",\"confidence\":\"medium\",\"raw_excerpt\":\"Economic Life (Design Life) Years 25 25 Can be capacity factor dependent. Technical Life (Operational Life) Years 40 40.\",\"ai_summary\":\"Generic OCGT design/economic life is used; actual Bell Bay Three has already operated for roughly two decades, so remaining life may differ.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"Previously announced withdrawal intention was rescinded\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.aemc.gov.au/sites/default/files/content/c8a0a093-4bf2-432b-8e7b-6157c58a3785/Annual-market-performance-review-final-report.pdf\",\"source_title\":\"Annual Market Performance Review 2016 Final Report\",\"publisher\":\"AEMC\",\"published_date\":\"2016\",\"confidence\":\"medium\",\"raw_excerpt\":\"Bell Bay Three Power Station, a gas fired power station in Tasmania, announced the intention to withdraw but this announcement has since been rescinded.\",\"ai_summary\":\"Market review notes an earlier withdrawal intention for Bell Bay Three was rescinded; no later permanent closure evidence was found in searched sources.\"},{\"field_name\":\"major_refurbishment_or_closure_notes\",\"value_text\":\"BBTHREE2 listed in 2025-26 AEMO marginal loss factor table\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/loss_factors_and_regional_boundaries/2025-26-marginal-loss-factors/marginal-loss-factors-for-the-2025-26-fin-year.pdf\",\"source_title\":\"Marginal Loss Factors for the 2025-26 Financial Year\",\"publisher\":\"AEMO\",\"published_date\":\"2025\",\"confidence\":\"high\",\"raw_excerpt\":\"Bell Bay Three No.2 ... 110 ... BBTHREE2 ... TBB12 ... 2025-26 MLF 0.9986 ... 2024-25 0.9977.\",\"ai_summary\":\"AEMO current loss-factor data indicates BBTHREE2 remains listed as a NEM generator connection point for FY2025-26.\"},{\"field_name\":\"technology_and_capacity_context\",\"value_text\":\"Bell Bay Three included in AEMO gas-powered generation forecasts as OCGT, natural gas pipeline, scheduled, installed capacity 120 MW\",\"value_numeric\":120,\"unit\":\"MW\",\"source_url\":\"https://www.aemo.com.au/-/media/files/gas/national_planning_and_forecasting/ngfr/2015/2015-national-gas-forecasting-report-v20--2-march-2016.pdf\",\"source_title\":\"2015 National Gas Forecasting Report\",\"publisher\":\"AEMO\",\"published_date\":\"2016-03-02\",\"confidence\":\"high\",\"raw_excerpt\":\"Power station | Bell Bay Three | Installed capacity (MW) 120 | Plant type | OCGT | Fuel | Natural Gas Pipeline | Dispatch type | Scheduled\",\"ai_summary\":\"AEMO confirms Bell Bay Three technology/fuel/dispatch classification and total station capacity for the three-unit plant.\"},{\"field_name\":\"technology_and_operating_context\",\"value_text\":\"AETV incident report describes BBTHREE1, BBTHREE2 and BBTHREE3 being brought online and then tripping due to loss of gas pressure in shared supply controlled by Bell Bay Metering Station PLC\",\"value_numeric\":null,\"unit\":null,\"source_url\":\"https://wa.aemo.com.au/-/media/Files/Electricity/NEM/Market_Notices_and_Events/Power_System_Incident_Reports/2009/0232-0035-pdf.pdf\",\"source_title\":\"Power System Incident Report – Simultaneous trip of AETV CCGT and OCGT units on 30/09/2009\",\"publisher\":\"AEMO\",\"published_date\":\"2009\",\"confidence\":\"high\",\"raw_excerpt\":\"Bell Bay Three generating units (BBTHREE1, BBTHREE2 and BBTHREE3) were not in service ... They were fed from a separate gas supply which was also controlled by the failed main PLC.\",\"ai_summary\":\"AEMO incident report confirms the BBTHREE DUID group and gas-supply dependency at the Bell Bay/Tamar Valley site.\"}],\"warnings\":[\"Exact BBTHREE2-only construction cost was not found; capex_total_aud is a pro-rata allocation from a reported three-unit project cost.\",\"Current fuel contract price and current delivered gas cost for BBTHREE2 were not found; fuel_cost_per_gj_aud is an old AEMO/ACIL modelling proxy in real 2014-15 dollars, not a reported current contract value.\",\"Fixed O&M, variable O&M and asset life are generic AEMO/Aurecon small-OCGT assumptions, not owner-reported Bell Bay Three accounts.\",\"Emissions intensity is calculated from AEMO heat rate and NGA natural-gas factor; no BBTHREE2 measured emissions intensity was found.\",\"No source-backed unit-specific major refurbishment cost was located.\"]}"
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