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Root Cause Investigation of Cracked Cylinder Liners in ALCO 251 Diesel Engines in Nuclear Standby Service
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 01, 1994 by SAE International in United States
Annotation ability available
This paper describes the root cause investigation of cracking in cylinder liners installed in ALCO 251 diesel engines in nuclear standby service. The results of the investigation identify conditions which contribute to cracking of the upper cylinder liner flange. It is demonstrated that the cracks are initiated via high cycle fatigue, but that most cracks will arrest. A cylinder liner with an arrested crack of this type would be expected to continue to provide reliable service. For worst case conditions, low-cycle thermal fatigue may cause crack growth to continue beyond the normal arrest point, ultimately causing catastrophic failure of the cylinder liner flange. Several corrective actions are identified to preclude the cracking of replacement cylinder liners. These corrective actions are applicable to all operators of ALCO 251 diesel engines. The root cause investigation included finite element stress analyses and fracture mechanics analyses of the cylinder liner and a detailed review of industry experience. Results in each of these areas are presented.
CitationHaller, C., Coward, R., and LaMastra, D., "Root Cause Investigation of Cracked Cylinder Liners in ALCO 251 Diesel Engines in Nuclear Standby Service," SAE Technical Paper 941811, 1994, https://doi.org/10.4271/941811.
- ALCO Instruction Manual TPI-936 May 1972
- Salem Generating Station Unit No. 2 2C Emergency Diesel Generator (EDG) 3R Cylinder Liner Failure December 2 1993
- MPR Calculation No. 108-32-01, Salem EDG Liner Cracking, Finite Element Stress Analysis December 28 1993
- Telecon: MPR to NAVSEA 03 December 7 1993
- Telecon: MPR to Canadien National Railway December 8 1993
- GE/ALCO Maintenance Instruction MI-11018G Cylinder Liner
- Technitrol·Eco, Inc. Lab Report No. 910439 February 21 1991 Cracked Cylinder Liners