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NUREG Investigation Report No. NUREG-LER-2011-003 2011 Operational Operational
R.E. Ginna Nuclear Plant Turbine Lube-Oil Piping Fatigue Fracture Causes Reactor Trip
R.E. Ginna Nuclear Power Plant, New York (NRC LER 2011-003)
Related equipment type → Steam Turbine (Steam Turbine)Related equipment → piping (piping)
0Fatalities
0Injuries
Fatigue ruptureMechanism code FTR
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
Fatigue ruptureFTR
ISO functional code (as recorded)
ISO 14224:2016 functional failure code
FTR · Fail to run / spurious stop
ISO FTR — Fail to run / spurious stop.
1What Happened

Turbine lube-oil system piping fatigue fracture -> low oil pressure -> main turbine trip and reactor trip on interlock

2Root Cause

Original construction piping high stress + substandard weld quality + cyclic fatigue; inadequate maintenance and inspection

3Reliability Lessons (from investigation root cause)
  • Original construction piping high stress
  • substandard weld quality
  • cyclic fatigue; inadequate maintenance and inspection
4Associated Failure Mechanisms (Keywords)
lube oil oil system oil loss bearing wipe bearing pipe fatigue weld defect low oil pressure
About the Failure-Mode Code (click to expand)

The recorded code FTR is an ISO 14224:2016 functional failure code (describes what the equipment failed to do). The damage mechanism (how it failed) is shown in the Mapping block above. The two are distinct dimensions in ISO 14224.

5Evidence Source (transparent)
Authority：U.S. Nuclear Regulatory Commission (NRC) — Licensee Event Report (LER)
Official Report：www.nrc.gov ↗
Data Verification：verified_url_nrc_pdf_2026-07-20
↗Related Failure Modes · Traceability
润滑失效/断油 COMP-C4-FM2Moving-Blade Erosion / Water Droplet Erosion blade_erosionBearing Oil Starvation / Babbitt Burn bearing_oil_failure密封失效 MECH-SEAL-FAILURE保温层下腐蚀 MECH-CUI结垢/堵塞 MECH-FOULING蠕变与应力破裂 MECH-CREEP氯化物应力腐蚀开裂 MECH-CLSCC不对中 MECH-MISALIGNMENT转子不平衡 MECH-UNBALANCE高温氧化 MECH-OXIDATION热疲劳 MECH-THERMAL-FATIGUE均匀/局部减薄（通用减薄） MECH-THINNING联轴器失效 MECH-COUPLING-FAILUREVibration Fatigue vibration_fatigue振动疲劳（Vibration Fatigue） vibration_fatigue轴承失效（磨损/剥落） MECH-BEARING-WEAR蠕变与应力破裂 MECH-CREEP密封失效 MECH-SEAL-FAILURE热疲劳 MECH-THERMAL-FATIGUE结垢/堵塞 MECH-FOULING润滑失效 MECH-LUBRICATION-FAILURE不对中 MECH-MISALIGNMENT转子不平衡 MECH-UNBALANCE高温氧化 MECH-OXIDATION冲蚀/冲刷腐蚀 MECH-EROSION均匀/局部减薄（通用减薄） MECH-THINNING燃灰腐蚀 MECH-FUEL-ASH联轴器失效 MECH-COUPLING-FAILURE振动诱发疲劳 MECH-VIB-FATIGUE大气腐蚀 MECH-ATMOS轴承失效（磨损/剥落） MECH-BEARING-WEAR冲蚀/冲刷腐蚀 MECH-EROSION密封失效 MECH-SEAL-FAILURE保温层下腐蚀 MECH-CUI润滑失效 MECH-LUBRICATION-FAILURE结垢/堵塞 MECH-FOULING不对中 MECH-MISALIGNMENT转子不平衡 MECH-UNBALANCE均匀/局部减薄（通用减薄） MECH-THINNING蠕变与应力破裂 MECH-CREEP联轴器失效 MECH-COUPLING-FAILURE振动诱发疲劳 MECH-VIB-FATIGUE脆性断裂 MECH-BRITTLE-FRACTURE大气腐蚀 MECH-ATMOS机械疲劳 MECH-MECH-FATIGUE轴承失效（磨损/剥落） MECH-BEARING-WEAR密封失效 MECH-SEAL-FAILURE安全仪表拒动 MECH-SIS-FAIL-TO-ACT蓄电池容量衰减 MECH-BATTERY-AGING润滑失效 MECH-LUBRICATION-FAILURE结垢/堵塞 MECH-FOULING不对中 MECH-MISALIGNMENT转子不平衡 MECH-UNBALANCE联轴器失效 MECH-COUPLING-FAILURE振动诱发疲劳 MECH-VIB-FATIGUE大气腐蚀 MECH-ATMOS热疲劳 MECH-THERMAL-FATIGUE
Report No. NUREG-LER-2011-003 · Data from NUREG (US NRC) public investigation conclusions, compiled by Reliability AI, for reliability demonstration purposes only. This case is derived from public incident investigation reports for learning purposes only. AIM does not endorse or guarantee its accuracy.