Advanced Candu Reactor

The ACR-1000 is an evolutionary, Gen III+, 1200MWe class pressure tube reactor, designed to meet industry and public expectations for safe, reliable, environmentally friendly, low cost nuclear power generation. The reactor core consists of fuel and light water coolant in pressure tubes with a heavy water moderator. Derived from the well established CANDU line of reactors, the ACR-1000 was developed from valuable project-based experience in the design, construction, and operation of CANDU plants for utilities around the globe.

The ACR-1000 retains basic CANDU design features such as; modular, horizontal fuel channel core, low-temperature heavy water moderator , water-filled vault, two diverse shutdown systems, on-power fueling and an accessible reactor building for on-power maintenance.

To achieve outstanding safety, operation, performance and economics, the ACR-1000 incorporates a specific set of innovative features and state-of-the-art technologies. This project uses highly complex cast-in-place concrete modeling. The unique construction methodology of the nuclear field has given us the opportunity to test the limits of Tekla Structures Software and it has reacted most favorably.

SMI Canaan Roller Mill No. 6

The steel detailing for this project was completed in approximately 5 months by 6 detailers.   The structure was 162 tons and consisted of 1,347 members including stairs, vertical and horizontal bracing, sag rods, handrail, beams, girders, floor and roof frames, and connections for girts and purlins.  The steel framing needed to be coordinated with the numerous tank, silo, dust collector, and equipment mounting patterns.  Because of the project deadline requirements, the project was fabricated by several fabricators. This model is exceptional due to the number of detailers involved, short schedule, extensive coordination and accuracy of detailing. 

Undisclosed Refinery

This oil refinery project features pipe racks, equipment platforms, catwalks, stairs, caged ladders, handrail and a crane bay. This project had 2,680 assemblies totaling 350 tons. The entire project was galvanized.

There is a lot of steel with many complicated connections in this model. This job was fabricated and installed without any problems. It was a fast paced job with numerous design changes throughout the less than 3 month duration.

Monroe Power Plant

Detailing for the project began in August 2007 and was finished on time in December 2007. This 1132 Imp tons of ductwork was very demanding on detailing and consisted of Unit 3 and 4 with several separate segments structurally isolated by expansion joints, the booster fans , and the absorber vessel. The two units were mirror images of each other. The most difficult part for detailing  was segment FG-D2-C with internal trusses and splitter plates dividing the duct work in different angles in both horizontal and vertical directions .The detailing was further more complicated with temporary steel, lifting lugs and their structural support. Part of the contract were catwalks and ladders.

The ductwork has several shop and field splices. The shop splices and sizes of the parts assembled at the shop were influenced by several factors, for example the size of the shop doors. The segments were put together in a barging facility and transported to the site.  The use of Tekla Structures through out this project proved an invaluable tool in bringing this project to a successful conclusion.

Regastification terminal at Irving Canaport

The Regastification terminal at Irving Canaport is the first LNG regasification plant in Canada. All the access platforms, instrumentation platforms, stairs, handrails and rails required 2 huge 262 foot diameter concrete tanks, 135 feet high on edge and 165 feet at the center point. Practically all the structures were pre-erected on the ground and lifted with all their fireproofing,  mechanical piping, control panels, etc. A huge 760T crane has been used to do the heaviest lift ever made by our company: 211T (464 000 lb).

Detailed with Tekla Structure 12.1 and 13.0, the global model contains nearly 2800 assemblies and 20 000 bolts for each tank. The contract has been completely detailed with Tekla Structures, so the drawing office was easily able to give all the support to the erecting team such as assembly center of gravity points, lifting weight, etc.

American Stone Quarry

The 310 ton project included the engineering, procurement, and construction of Stations #1 and #2, and six conveyors at the American Stone Co. Quarry located near Carrboro, NC. Tekla Structures was used to model the two stations and six conveyors. Drawing and NC files generated by Tekla Structures were used in the shop manufacturing process. A Tekla Structures Viewer was provided at the construction site to expedite installation.

Campo Morado Project Cemented Rockfill (CRF) Plant

This plant automatically mixes coarse aggregate, sad, cement, water, and an admix together into a low strength concrete referred to as cemented rockfill (or CRF) in the mining industry. The CRF is hauled underground in 30 ton capacity trucks and used to backfill excavations made in the course of mining operations.

Major components of this plant include; coarse aggregate and sand storage hoppers with feeder conveyors, dual miser feed conveyors, a twin shaft continuous type concrete mixer, cement silo with weigh hopper and feed screw conveyor, water holding tank and metering system, PLC control system and motor control center (MCC). The control system and MCC are located within the control room along with an air compressor, receiver tank and refrigeration type air dryer. Pneumatic controls are located throughout the plant with solenoid valves centrally located in separate enclosure at the mixer platform.

Aggregate and sand are stored in bulk hoppers which utilize electric vibrators to ensure consistent material flow through the feeder belts onto the main conveyors. The aggregate and sand conveyors incorporate weigh scales (idlers) to continuously measure the material flow into the mixer. The coarse aggregate is the process variable, with all other materials fed into the mixer in direct proportion to the use of variable frequency drives (VFD's) on motors which are automatically controlled by the PLC logic. The total quantity of aggregate fed through the mixer is used to determine the final batch size (suitable for the size of the haul truck).

Tekla Structures was exclusively used to layout this CRF plant and produce all the required fabrication and installation drawings. No other design software was needed. The capabilities and flexibility of Tekla Structures allowed the production of a workable model in a minimum amount of time all the while ensuring the required components would fit together long before the construction started.

Penasquito

This structure is the Filtration and Concentrate Storage Area for the Penasquito mining process plant in Central Mexico. The heavy filter presses are located in the upper floor while the concentrates are stored and loaded in trucks on the lower level. The mine will process 130,000 metric tons per day of ore to generate lead and zinc concentrates. About 650 tons of the structural steel, grating, handrail and stairs were used in this portion of the project. Major mechanical equipment and piping were placed in the model to identify possible collisions between these items and the structural steel.

Tekla Structures modeling software was integral in the successful detailing, fabrication and construction of this structure. Tekla software has allowed for an accelerated schedule and will assure fit-up and compatibility with the many vendor components. this 3D model illustrates the advantage of including all the relevant non-structural materials and mechanical equipment in order to achieve fully integrated BIM.

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