A12. Shaft Packing PowerPoint.pptx

Clarence Cannon dam Packing replacement Hannibal, MO USACE – St. Louis District Date: Wednesday, April 22 2020 Time: 12:30 PM – 1:30 PM (CST)

Clarence Cannon dam Packing replacement The Contractor shall furnish all labor, equipment, and supplies necessary for the replacement of Unit No. 1 Turbine packing, packing gland, and H-ring assembly.

Based on the as-found condition of the shaft sleeve:

If the sleeve is in acceptable condition, install new packing, H-ring, and gland.

If the sleeve needs replacement, remove packing box, remove shaft sleeve. Install new shaft sleeve. Paint packing box. Install new packing, H-ring, and gland.

Clarence Cannon dam Packing replacement Asbestos: Turbine Vendor will provide access to area, remove cover and gland. A separate Contractor will remove the existing packing and proper disposal.

General access and parking area.

Clearance Cannon is a small 2 unit powerhouse with one Kaplan unit and one Francis unit. There is a small erection bay for staging work.

There is an 18” circular service door on the inner head cover

Two service doors on the inner head cover.

The turbine pit area. Access to the packing area is very tight from above.

Typical condition of the gland and packing box. Much of this brown material is mud/silt.

A view of the turbine shaft and slinger ring above the gland

Packing box gland water piping will need to be removed.

Another view of the gland and turbine shaft and slinger ring

Packing box gland water piping view

Another view of the gland and packing box

A view of the inner head cover access door

A close up view of the inner head cover access door

Scroll case access door area.

A view of the access platform to get to the scroll case area

A second view of the access platform to get to the scroll case area

Access to the inner head cover is available by walking between the stay vanes and wicket gates, approximately 6 feet tall and 2 feet wide area.

With the Kaplan blades at full flat, there is a reasonable standing area to work. It is however possible to setup temporary scaffolding in this area, if the Contractor so chooses.

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