Conference Proceedings Paper
CRANE REHABILITATION AND MODERNIZATION
11th International Conference on CANDU® Maintenance and Nuclear Components - 2017 Oct. 01-04
F. Wolsey (Bruce Power)
As the CANDU plants that were built in the 1970s and 1980s age and enter their Life Extension phase, their associated infrastructure must be considered as candidates for life extension as well. Typically the large overhead cranes in any power plant were used to build the equipment they now service. As such most turbine hall cranes have, for example had a longer service life than the turbine-generators themselves. This paper and presentation will explore the problems encountered during Bruce 1&2 Restart with not refurbishing major cranes, including serious delays of critical path work. It will further present and evaluate the strategies that Bruce Power continues to employ to refurbish its fleet of overhead cranes that service the Turbines, Reactor, Spent Fuel Bays and Shops. At Bruce Power, we have employed four distinct approaches to crane refurbishment: Refitting where the worn and obsolete components are replaced with new and different components; Rebuild where old components are replaced with similar new components with minor design changes; Replacement where the entire crane is changed out, often with a capacity increase, and the “Creative Solution” that is required when the first three approaches will not work. It will look at Lessons Learned from these four different approaches and how each would be applicable elsewhere. This paper will also discuss the “new” technology that is being employed to improve crane utility, including Variable Frequency Drive for crane motors.
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