N-1CI 49595 – HYD Tusket Unit 1 Overhaul - Application - Redacted
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CI 49595 Attachment 1 Page 9 of 28 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Lower wicket gate ring to throat has cracks 80% around. See chipped paint area above stainless steel. Wheel pit Liner / head cover Flange- The wheel pit liner i...
AI summary The text describes the condition of a wheel pit liner, noting significant corrosion, rust, and potential lead paint. It mentions the liner's age, previous repairs in 1964, and the need for blasting, thickness tests, repairs, and repainting.
Operating ring Excessive wear .200"+ clearance in the left to right direction. Operating ring, lower wear pads. Distorted and wore out. Wicket Gates - Lots of cavitation on the wicket gates especially under the paint these pits cause turbu...
AI summary The text describes issues with the operating ring and wicket gates in a hydroelectric facility, including excessive wear, distortion, cavitation, and structural damage to specific gates, which have led to degraded performance and turbulent flow.
CI 49595 Attachment 1 Page 18 of 28 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Headcover- The head cover is fairly simple piece in Tusket, its big and heavy but it's basically one part. It will need to be removed from the powerhouse due t...
AI summary The document discusses the condition and required maintenance of a turbine head cover in Tusket, noting the need for removal, blasting, inspection, repairs, and painting. Cavitation issues are to be addressed by smoothing the water path, and the head cover's clearance with the runner hub is specified. The turbine bearing housing bolt holes are rough, requiring fastener scoping and repairs. The head cover flange with studs and nuts is rusted and needs replacement and refurbishment.
TUSKET Unit#1 – Re-Evaluation October 2020 An internal request from Hydro Operations was made for the Heavy Maintenance Shop to give a second opinion on the condition of some of the underwater mechanical components of TUS1 generator in Oct...
AI summary An internal request was made in October 2020 for a second opinion on the condition of underwater mechanical components of the TUS1 generator. Concerns were raised about excessive wear in wicket gate mechanisms, operating rings, and related components, with potential impacts on performance and safety.
The existing runner's service life is approaching 100 years old, which is generally considered long past the expected life cycle of the equipment. The existing components anticipated to be reused have an extremely high risk of fatigue fail...
AI summary The existing runner is nearly 100 years old, far beyond its expected service life, and components intended for reuse face a high risk of fatigue failure without proactive replacement.