{"query_echo":{"q":"","filters":{"analysis_type":["condition monitoring"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'condition monitoring' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":3,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=condition+monitoring","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"cer-000264","url":"https://climateinsightsdirectory.org/document/cer-000264","title":"8.2-run-until-2025-1-9cbc246dbedac611.pdf","publisher":{"name":"Centre for Environmental Rights","organization":"centre-for-environmental-rights"},"document_type":"report","language":"en","date_published":null,"source_url":"https://cer.org.za/wp-content/uploads/2017/07/8.2-Run-Until-2025-1.pdf?x21779","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","analysis_type"],"summary":{"text":"The Hendrina Power Station Consolidated Life-ex Report evaluates the technical condition of various plant systems to determine the requirements for extending the station's operational life to 2025. The report identifies critical failures in turbine auxiliaries, pump casings, electrical motors, and ash disposal facilities, while noting that many systems can operate until 2025 provided that maintenance backlogs are addressed and specific component replacements are executed.","ai_generated":true,"unit":"cer-000264#summary","date_modified":"2026-08-17"},"key_insights":[{"text":"The turbine plant's overall status indicates that while operation until 2025 is critical, extending the life until 2035 without replacement is not possible.","ai_generated":true,"unit":"cer-000264#insight-1","date_modified":"2026-08-17"},{"text":"Condenser tubes, particularly in the air extraction zone, require replacement to ensure operation until 2025; other tubes show wall loss up to 40% and may last until 2025 with regular maintenance.","ai_generated":true,"unit":"cer-000264#insight-2","date_modified":"2026-08-17"},{"text":"Between 2000 and 2012, 76 unit trips or operating incidents occurred due to equipment failure (47 incidents) and human error (29 incidents), with the primary causes being high condenser vacuum, condenser tube leaks, and condenser high level.","ai_generated":true,"unit":"cer-000264#insight-3","date_modified":"2026-08-17"},{"text":"High Pressure (HP) and Low Pressure (LP) heaters with tube plug rates of 10% or higher require replacement for continued operation until 2025. Specifically, 12 out of 60 HP heaters across the station meet this criteria.","ai_generated":true,"unit":"cer-000264#insight-4","date_modified":"2026-08-17"},{"text":"Main Steam Feed Pump (SFP) and Condensate Extraction Pump (CEP) casings have a 35-year life limit and most are beyond this limit, making maintenance increasingly difficult due to inferior materials and physical distortions.","ai_generated":true,"unit":"cer-000264#insight-5","date_modified":"2026-08-17"},{"text":"Original unit-plant related LV motors are considered uneconomical to operate and are not acceptable for operation until 2025, requiring immediate high-priority replacement.","ai_generated":true,"unit":"cer-000264#insight-6","date_modified":"2026-08-17"},{"text":"The station's MV PILCSWA cables are systematically unreliable, leading to previous replacement programs by Eskom, particularly for mill motors and ash water return pumps.","ai_generated":true,"unit":"cer-000264#insight-7","date_modified":"2026-08-17"},{"text":"The current ash dam complex is predicted to be capable of containing ash production only until the middle of 2018, necessitating the construction of Ash Dam 6 by 2016 or 2017 to avoid interrupted operations.","ai_generated":true,"unit":"cer-000264#insight-8","date_modified":"2026-08-17"},{"text":"Cooling Tower 4 exhibits multiple long vertical cracks in the upper zone, which is a serious concern as it may indicate an inability to resist wind loadings.","ai_generated":true,"unit":"cer-000264#insight-9","date_modified":"2026-08-17"},{"text":"The North Sedimentation plant is non-functioning, which results in uncontrollable cooling water quality and adversely affects the condensers.","ai_generated":true,"unit":"cer-000264#insight-10","date_modified":"2026-08-17"}],"climate_tags":["energy transition","power plant maintenance","infrastructure longevity"],"geography_discussed":[],"frame_perspective":[],"analysis_type":["technical assessment","life extension study","condition monitoring"]},{"id":"cer-000273","url":"https://climateinsightsdirectory.org/document/cer-000273","title":"8.2-run-until-2025-5-464c7f87ca73e9f7.pdf","publisher":{"name":"Centre for Environmental Rights","organization":"centre-for-environmental-rights"},"document_type":"report","language":"en","date_published":null,"source_url":"https://cer.org.za/wp-content/uploads/2017/07/8.2-Run-Until-2025-5.pdf?x21779","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","analysis_type"],"summary":{"text":"This report provides a consolidated life-extension (Life-ex) assessment of the Hendrina Power Station, focusing on the boiler, draft plant, and turbine plant. It details component failures, modifications, and inspection results to determine the feasibility of running the plant until 2025 or 2035, highlighting critical life exhaustion in high-pressure turbine components and erosion in air heaters and PA fans.","ai_generated":true,"unit":"cer-000273#summary","date_modified":"2026-08-17"},"key_insights":[{"text":"The high-pressure (HP) turbine components, including rotors, inner casing, steam inlets, combined ESV&CV-casings, and loop pipes, have already exhausted their lifetime according to calculations and investigations, with some remaining operation time under 30,000 equivalent operating hours (EOH).","ai_generated":true,"unit":"cer-000273#insight-1","date_modified":"2026-08-17"},{"text":"The low-pressure (LP) turbine exhibits several critical issues, including the risk of uncontrolled Low Cycle Fatigue (LCF) failure in rotor stage 4 TS/GS, severely eroded LP stage 1 TS & GS diaphragms, and stage 2 blades that have reached the end of their life after exceeding 200,000 EOH.","ai_generated":true,"unit":"cer-000273#insight-2","date_modified":"2026-08-17"},{"text":"The turbine's control and protection systems are outdated, with obsolete parts for steam pressure and vacuum operated load reducers and Herion solenoid valves, making operation until 2025 or 2035 impossible without a complete exchange for a modern system.","ai_generated":true,"unit":"cer-000273#insight-3","date_modified":"2026-08-17"},{"text":"The Primary Air (PA) fans are in very poor condition due to minute fly ash erosion, which is exacerbated by blocked air heaters causing ash overflow into the fans, necessitating the replacement of casings for ongoing operation.","ai_generated":true,"unit":"cer-000273#insight-4","date_modified":"2026-08-17"},{"text":"Inspection of the boiler's superheater (SH) components showed that the SH 3 inlet and outlet header have an estimated remaining useful life of 60,000 to 90,000 hours, while the final SH header's remaining life was also estimated between 60,000 and 90,000 hours in 2011.","ai_generated":true,"unit":"cer-000273#insight-5","date_modified":"2026-08-17"},{"text":"The boiler's pulverized fuel system has experienced various failures, including 42 incidents of feeder pick-ups not working and 28 spiral feeder trips on unit 8, with site personnel reporting continuous repairs to feeder motors and the replacement of spirals.","ai_generated":true,"unit":"cer-000273#insight-6","date_modified":"2026-08-17"}],"climate_tags":["energy transition","power plant maintenance","life extension","infrastructure degradation"],"geography_discussed":[],"frame_perspective":[],"analysis_type":["technical assessment","condition monitoring","life expectancy analysis"]},{"id":"cer-000277","url":"https://climateinsightsdirectory.org/document/cer-000277","title":"8.3-run-until-2035-2-b25994b3fd225c13.pdf","publisher":{"name":"Centre for Environmental Rights","organization":"centre-for-environmental-rights"},"document_type":"report","language":"en","date_published":null,"source_url":"https://cer.org.za/wp-content/uploads/2017/07/8.3-Run-Until-2035-2.pdf?x21779","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","analysis_type"],"summary":{"text":"This report provides a consolidated life-extension (Life-ex) assessment for the Hendrina Power Station, evaluating the technical requirements and physical condition of plant components to extend operational life until 2035. It details critical failures in electrical systems, the status of boiler and turbine plant areas, and the necessary capital interventions to maintain reliability.","ai_generated":true,"unit":"cer-000277#summary","date_modified":"2026-08-17"},"key_insights":[{"text":"The 'UNITROL D' Automatic Voltage Regulators (AVRs) installed between 1994 and 2000 are becoming obsolete, with an expected end of life within 5 years. Frequent failures of electronic cards—specifically the Computing Unit (UN 0660 a), Gate Control Unit (UN 0663 b), and Power Supply Unit (UN 0664 a)—lead to unit trips and load losses due to a lack of redundancy.","ai_generated":true,"unit":"cer-000277#insight-1","date_modified":"2026-08-17"},{"text":"Auxiliary transformers are experiencing rapid ageing caused by high moisture levels resulting from leaks, damaged breathers, broken fittings, and missing seals. This condition contravenes Eskom Standard 240-56358993; however, 36 new transformers are on site as part of a refurbishment project to ensure reliable operation until 2035.","ai_generated":true,"unit":"cer-000277#insight-2","date_modified":"2026-08-17"},{"text":"Low Voltage (LV) motors exhibit widespread mechanical problems, including worn bearing housings and shaft journals, which cannot be fixed by refurbishment. Many motors show high temperatures indicative of damaged interlamination insulation or core damage from repeated rewinds, making original unit-plant LV motors uneconomical to operate until 2035.","ai_generated":true,"unit":"cer-000277#insight-3","date_modified":"2026-08-17"},{"text":"Medium Voltage (MV) motors are in poor condition, with 10% categorized as high risk based on partial discharge findings. Issues include cracked rotor bars, blocked cooling air circuits, and bad cores. Reliable operation until 2035 is deemed impossible with the current population, necessitating a replacement program prioritizing ID fan, EFP, and PA fan motors.","ai_generated":true,"unit":"cer-000277#insight-4","date_modified":"2026-08-17"},{"text":"PILCSWA MV cables are in poor mechanical condition, particularly where exposed to moisture, creating a safety risk and a high probability of failure within 0 to 2 years. While XLPE cables are stable, the report recommends complete replacement of all original PILCSWA cables to maintain reliability until 2035.","ai_generated":true,"unit":"cer-000277#insight-5","date_modified":"2026-08-17"},{"text":"The busduct system in Unit 6 shows excessive discharge, and a significant percentage of insulators in Units 3 and 9 failed upon removal (37.5% and 18.8% respectively). Without intervention, partial discharge may lead to the loss of structural integrity and catastrophic failure.","ai_generated":true,"unit":"cer-000277#insight-6","date_modified":"2026-08-17"},{"text":"Control and Instrumentation (C&I) systems, including the SIMATIC S5 family and the PCS7 control system, are reaching the end of their life spans by 2015 and 2020 respectively. The Bentley Nevada Vibration Monitoring System installed in 2012 is expected to require an upgrade by 2023.","ai_generated":true,"unit":"cer-000277#insight-7","date_modified":"2026-08-17"},{"text":"To accommodate ash volumes calculated for operation until 2035 (44,565,700 tons), Ash Dam 6 will require a base area of approximately 139 hectares.","ai_generated":true,"unit":"cer-000277#insight-8","date_modified":"2026-08-17"},{"text":"Theoretical assessments of boiler tubes for Units 1-5 indicate a life of more than 500,000 hours regarding creep rupture, meaning no boiler tubes are expected to fail due to creep, though transition pieces on the Secondary Superheater will require periodic replacement.","ai_generated":true,"unit":"cer-000277#insight-9","date_modified":"2026-08-17"},{"text":"The station's earthing and earth mat are estimated to have a remaining life of 25 to 50 years, provided they are upgraded to comply with Eskom standard 474-085, as current maintenance practices are not in accordance with established standards.","ai_generated":true,"unit":"cer-000277#insight-10","date_modified":"2026-08-17"}],"climate_tags":["energy transition","power plant maintenance","infrastructure longevity"],"geography_discussed":[],"frame_perspective":[],"analysis_type":["technical assessment","life-extension study","condition monitoring"]}]}