Generator Replacement Proves Cascade General Capabilities
Cascade General had its knowledge and expertise put to the test with the emergency replacement of a faulty generator on P&O's Sea Princess. Measuring 857 ft. (261.2 m), the vessel, which was built by Fincantieri in 1998, was in drydock at the Portland shipyard for approximately nine days in September.
The project began on the vessel's exterior with the rigging crew building a 20- ft. loading platform on the drydock ed inside the engine room to clear an exit path for the 47-ton GEC Alstom generator.
Two of Sea Princess' four propulsion transformers at 20-tons each, were disconnected and moved aside, catwalks lifted and all wiring and piping blocking the exit route labeled and cut. The generator was outfitted with a temporary shaft-support bracket, jacked up and rolled aft on a pair of girders set up as temporary rails. It was subsequently lifted and turned onto a second set of rails running abeam, skidded out of the ship and transported by drydock crane and trailer to an assembly bay.
With approximately six mm of clearance between the generator's 20-ton rotor and 27-ton stator, they were carefully separated using an overhead crane and a high-capacity tri-lifter.
On the fifth day of construction, the generator was returned to the engine room, allowing the bulkhead to be sealed up. The 2,100 volt transformers were then skidded into position and secured - followed by the hull insert welded into place. It was then ultrasonically tested, inspected and approved by RINA.
During this drydocking, Cascade also overhauled Sea Princess' bowthrusters, sea valves, seachests and strainers, prepared and coated the underwater and surface areas and the topside white. The vessel also had its rudder and propeller shafts inspected, ballast tanks surveyed, and all 16 of its lifeboats and davits recertified.
On its ninth and final day of lay-up, the vessel left Cascade with a revamped generator. Minor additional work was continued en route to San Francisco, upon which the fourth engine was restarted, and full power restored.
Circle 8 on Reader Service Card
Other stories from December 2000 issue
- A Pointer to the Future page: 8
- Generator Replacement Proves Cascade General Capabilities page: 12
- ASRY Readies Facilities For Increased Demand page: 13
- Elliott Bay Design Applies FEA To Todd's Drydocks page: 14
- CSO Deep Blue Launched page: 16
- Enhanced Escort Tug Ajax Delivered to 0stensjo Rederi page: 18
- DH Tanker Launched page: 19
- Cammell Laird Secures Upgrading And Drydocking Of RFA Argus page: 20
- Bollinger To Build Two Liftboats For Cardinal Services page: 22
- New Deliveries, Consolidation Drive Cruise Industry page: 23
- GE Marine Engines' Gas Turbines To Be Used On Princess Newbuilds page: 27
- French Yard Tapped To Build $780M Queen Mary 2 page: 27
- Royal Caribbean Crew Honored For Rescue At Sea page: 28
- History Repeats Itself In the "City of Brotherly Love" page: 29
- Great Ships of 2000 page: 33
- New Crane Set To Revolutionize Salvage Work page: 38
- No Smoking Allowed page: 39
- STN Atlas Debuts PPB System page: 40
- PropacRudder Benefits Confirmed In Service page: 40
- A&R Introduces New SWATH Concept page: 40
- Is 3-D Product Modeling Practical For Small U.S. Shipyards? page: 47