Power Generation

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Fossil Plant Decommissioning

By | November 18th, 2016|Fossil|

In early 2016 a Michigan Utility contracted UCC to provide consultation for a planned decommission of a fossil fuel power generation plant. UCC assisted with project planning, construction methodology and system condition assessments to ensure a successful project. In May of 2016 all eight coal fueled units were taken offline after 76 years of operation [...]

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Midwest nuclear station water intake structure repair

By | April 1st, 2015|Nuclear|

In the spring of 2013 Underwater Construction Corporation (UCC) worked with a Midwest nuclear station to develop a repair plan for the sites raw water intake structure. In July 2013 the formal award was given whereby the mobilization of UCC’s crew and work vessel the “Salvor” began. The intake crib located in one of the [...]

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Winter Deep Water Diving

By | February 27th, 2015|Hydro|

During the winter of 2012 UCC Midwest Division was contracted to perform a deep water diving inspection for a hydroelectric facility in the Northern Midwest. One of UCC’s double lock chambers and deep water diving oversight was provided onsite to increase the safety of the dive. Multiple dives were required to assess the structure and [...]

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Standby Service Water Basins – Roof Slab Cracking

By | February 25th, 2015|Nuclear|

Underwater Coating Application to Seal Cracks (Nuclear Power Project – applicable to any industry with concrete infrastructure) The concrete roof slabs of SSW Basins A and B demonstrated full thickness cracking of the concrete slab covering a large portion of each basin.  The roof slab extends below the water line in each basin.  A previous [...]

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Decommissioning of Nuclear Storage Basin

By | February 24th, 2015|Nuclear|

Nuclear Storage Basin – Radioactive Sludge and Debris Removal Underwater removal & packaging of highly radioactive material (DOE Decommissioning Project – applicable to both government and commercial nuclear facilities) Over 300 dives were performed with no skin contaminations.  Radiological conditions were extreme with contact dose rates in the sludge ranging from 0.050 Rem/hr to 30 Rem/hr [...]

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Safety Related BWR Steam Dryer/Separator Inspection & Repair

By | February 23rd, 2015|Nuclear|

Reactor Internal– Various failures and Modifications Underwater Welding and Cutting on Safety related Stainless Steel Components (Nuclear Power Project) UCC completed their first Steam Dryer repair in 1983.  Since then UCC has made various repairs or modifications to BWR Steam Dryer.  To date, UCC has performed more than 30 different projects on Steam Dryers all over [...]

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Safety Related Coating / Substrate Inspection & Repair

By | February 22nd, 2015|Nuclear|

Standby Service Water Basins – Protective Coating failure Underwater Coating Application to evaluate corrosion and repair coating defects on carbon Steel (Nuclear Power Project – applicable to any industry with coated carbon steel in immersion service) Underwater coating repair in commercial nuclear plants is an accepted maintenance approach.   Some of the early applications have now been [...]

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Coating Repair

By | February 20th, 2015|Nuclear|

Standby Service Water Basins – Protective Coating failure Underwater Coating Application to repair coating defects on carbon steel pipe (Nuclear Power Project – applicable to any industry with coated carbon steel in immersion service) Coated carbon steel pipe in two concrete emergency cooling water basins demonstrated extensive coating failure and corrosion (see Figure 2) leading to [...]

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Leak Inspection & Repair

By | February 3rd, 2015|Hydro|

Clay Lined Water Reservoir Grout Injection to Seal Large Fissures (Water Power Project – applicable to any industry with water retaining structure) The clay liner of an 842 acre reservoir supporting a 1872 megawatt pump storage facility developed large trench-like features.  Reservoir depth ranged from 40 feet to 110 feet.  Before a repair could be designed [...]

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Concrete Restoration

By | February 2nd, 2015|Hydro|

Concrete gravity Dam Underwater Concrete Placement (Water Power Project – applicable to any industry with concrete water retaining structure) A concrete gravity dam with an earth core and rock/soil foundation was completed in 1944.  The dam is 8,422 feet long, 206 feet high with a 130 foot head.  Maximum storage is 6,129,000 acre-feet and the purpose [...]

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