N-1CI 49595 – HYD Tusket Unit 1 Overhaul - Application - Redacted
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DESCRIPTION: This project is for the refurbishment of Tusket Unit 1 turbine. The work includes replacement of the Kaplan runner with a stainless steel, oil-free hub design, the replacement of the main shaft bearings, and conversion of grea...
AI summary This project involves the refurbishment of Tusket Unit 1 turbine at the Tusket Hydro Station, which includes replacing the Kaplan runner, bearings, and other components to address deterioration and extend the unit's operating life. The station has been in service since 1929 and Unit 1 was last overhauled in 1981.
Why do this project? The Tusket Unit 1 overhaul is required to address significant deterioration of critical turbine components and restore the unit's safe and reliable operation. Previous inspections (Attachment 1, Attachment 2) identifie...
AI summary The Tusket Unit 1 overhaul is necessary due to significant deterioration of critical turbine components, identified through previous inspections, which has led to issues such as excessive wear, unacceptable linkage and gate movement, and reduced gate control.
Condition Assessment Tusket Hydro-electric Power Generating Station Unit #1 – 1929 Inspection period: July-August, 2019 Final report: February, 2020 Fundy Hydro System- Tusket Powerhouse NOVA SCOTIA POWER INC. - Hydro Maintenance Services...
AI summary This document provides a condition assessment of Unit #1 at the Tusket Hydro-electric Power Generating Station, conducted in July-August 2019, with a final report issued in February 2020. The assessment was prepared by Nova Scotia Power Inc.'s Hydro Maintenance Services, led by Dylan Doucette.
CI 49595 Attachment 1 Page 4 of 28 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Built then Commissioned in 1929. Tusket is a three unit powerhouse. With a 4th scroll case for one more generator that was never installed. The 4th bay scroll c...
AI summary The text discusses the condition of the Tusket powerhouse, highlighting structural and mechanical issues such as deteriorating ladders, eroded concrete, cavitation damage, and the need for significant repairs to maintain voltage support and water control. The importance of preserving the facility is emphasized due to its strategic location and role in grid stability.
CI 49595 Attachment 1 Page 12 of 28 REDACTED (CONFIDENTIAL INFORMATION REMOVED) time. Recommendation: New door / inspection cover or remove completely, repair throat ring and not install new door. Kaplan Turbine – Variable pitch 4 blades –...
AI summary The document describes the condition of a Kaplan Turbine with variable pitch blades, noting severe cavitation, damage, and past repairs. It recommends replacing or removing the turbine door and repairing the throat ring due to structural concerns.
CI 49595 Attachment 2 Page 2 of 2 REDACTED (CONFIDENTIAL INFORMATION REMOVED) There is cavitation on the runner blades, on the bottom side, at the intersection of the stainless weld repairs to the original material. Also, some of the trunn...
AI summary The document describes cavitation damage on turbine components, including runner blades, trunnions, and the draft tube liner, and recommends repairs such as replacing parts, refurbishing, and removing the runner for further work.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED CI 49595 Attachment 3 Page 1 of 22 Norcan Hydraulic Turbine, Inc. 50 Bruce Crescent Carleton Place, Ontario Canada K7C3V6 Nova Scotia Power Inc. 1223 Lower Water Street Halifax. Nova Sco...
AI summary Norcan Hydraulic Turbine Inc. provides a revised proposal to supply an upgraded Kaplan runner replacement for Unit #1 of the Tusket hydroelectric station, including headcover modifications and condition assessment requirements. The proposal includes contingency planning and is expected to be executed under a modified NSPI contract agreement.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED CI 49595 Attachment 3 Page 3 of 22 Nova Scotia Power Inc. Tusket Unit #1 Runner Replacement
AI summary The document discusses Nova Scotia Power Inc.'s Tusket Unit #1 Runner Replacement project, which involves the replacement of a turbine runner at the Tusket hydroelectric facility.
EXECUTIVE SUMMARY The Tusket hydroelectric station, operated by Nova Scotia Power, is a hydroelectric power plant located near Yarmouth, Nova Scotia. It's part of the Tusket Hydro System, which includes four storage reservoirs. The station...
AI summary The Tusket hydroelectric station, operated by Nova Scotia Power, has Unit #1 turbine and generator that require refurbishment due to excessive wear and cavitation erosion. The Customer seeks innovative solutions to extend the turbine's service life, but constraints prevent the implementation of the requested solutions.
Notes: 1. Major Component Materials (Runner Castings)
AI summary The text discusses major component materials, specifically runner castings, which are relevant to infrastructure planning and power generation.
2.1 SITE INFORMATION SITE OWNER: Nova Scotia Power Inc. SITE NAME: Tusket Hydroelectric Station SITE ADDRESS: 51 Bennys Lane Tusket, Nova Scotia Canada B0W 3M0 SITE CONTACT: N/A (Unknown) GEOLOCATION: 43°52'55" N 65°58'40" W
AI summary The document provides site information for the Tusket Hydroelectric Station, owned by Nova Scotia Power Inc., located in Tusket, Nova Scotia, Canada. The site address, contact information, and geolocation are included.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED CI 49595 Attachment 3 Page 12 of 22 Nova Scotia Power Inc. Tusket Unit #1 Runner Replacement
AI summary The text refers to a project involving the replacement of the runner at the Tusket Unit #1 facility operated by Nova Scotia Power Inc.
Nova Scotia Power Inc. Tusket Unit #1 Runner Replacement 3.4 KAPLAN RUNNER ASSEMBLY DESIGN MATERIALS Component Base Material Condition Reference Grade ADDITIONAL NOTES SURFACE FINISH, WAVINESS, PROFILE Materials: 3.5 TURBINE SHAFT ASSEMBLY...
AI summary The document discusses the replacement of the Kaplan runner assembly and turbine shaft assembly for Unit #1 at the Tusket facility, including material specifications and design considerations. Certain sections of the document are redacted and marked as confidential.
Hello Patrick, As requested, we are pleased to provide the following estimate to perform the minor overhauls of three Woodward Gateshaft Governors (circa 1929) at the Tusket hydroelectric generating station located in the Tusket, NS, Canad...
AI summary An estimate is provided for the minor overhauls of three Woodward Gateshaft Governors at the Tusket hydroelectric generating station, with a note about examining S. Morgan Smith Kaplan Blade controls.
MEMO Date: 2025-Oct-10 File No.: 251166 To: Patrick Pellerin, P.Eng. From: Carson MacKay, E.I.T. Thomas McNutt, P.Eng. Address: Nova Scotia Power Incorporated 1223 Lower Water Street Halifax, NS, B3J 3S8 Subject: Tusket Powerhouse Scroll C...
AI summary This memo from Carson MacKay and Thomas McNutt to Patrick Pellerin discusses the conceptual design phase for the repair of concrete in the Tusket Powerhouse Scroll Case.
1. BACKGROUND Harbourside Engineering Consultants (Harbourside) were retained by Nova Scotia Power Incorporated (NSPI) to prepare a conceptual design and opinion of probable constructions costs for a repair in the scroll case of the unit 1...
AI summary Nova Scotia Power Incorporated (NSPI) has engaged Harbourside Engineering Consultants to assess the probable construction costs for repairing the scroll case of Unit 1 turbine at Tusket Powerhouse. The concrete anchor block, which supports the quadrant shaft, has separated from the main pedestal, and temporary repairs have been made, though their effectiveness is uncertain. NSPI plans to overhaul the turbine starting in 2026 and is seeking preliminary design work.
General Notes: - Background provided by NSPI: NSPI are looking to overhaul the Tusket unit 1 turbine starting in 2026 and are looking to get a head start on some of the design work, particularly around the scroll case. Located in the scrol...
AI summary NSPI is planning to overhaul the Tusket unit 1 turbine starting in 2026 and needs options for repairing a concrete block that has separated from the main pedestal. The block supports the quadrant shaft, which controls the wicket gates, and temporary repairs have been made, but the cause of the separation is unknown.
1. Background This Scope of Work defines the engineering design services, drawings, material specifications, and quality documentation required to support the overhaul of the Tusket 1 hydro turbine. The engineering package will provide ful...
AI summary The Scope of Work outlines the engineering design services needed for the overhaul of the Tusket 1 hydro turbine, including detailed construction drawings and quality documentation. The turbine, located near Yarmouth, NS, consists of three 900 kW units manufactured by S. Morgan Smith and commissioned in 1929. Disassembly will begin in summer 2026.
3.3 Turbine Bearing – Lignum Vitae Staves - Design new lignum vitae staves with end-grain orientation. Must be compatible with the existing bearing housing.
AI summary The document discusses the design of new lignum vitae staves with end-grain orientation that must be compatible with the existing bearing housing in turbine bearings.
3.4 Headcover Wicket Gate Bushings - Provide design to support the conversion of greased bronze bushings to greaseless CIP bushings with integrated seals to prevent water ingress.
AI summary The document requests the provision of a design to support the conversion of greased bronze bushings to greaseless CIP bushings with integrated seals to prevent water ingress.
Mechanical Design – Scope of Work Tusket 1 Overhaul - Technical Support - Bill of Materials - ITP Sheets (as deemed necessary)
AI summary The text outlines the mechanical design scope of work for the Tusket 1 Overhaul, including technical support, bill of materials, and ITP sheets as needed.