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Energy production
Production - Hydroelectrical
- Baie Comeau – Construction of the Toulnustouc hydroelectrical power station. Construction of a new power station on the Toulnustouc river, north of Baie-Comeau, including a dam and a power station equipped with two "Francis" type groups each with a nominal capacity of 263 MW. Two 315 MVA transformers increase the tension from 13,8 kV to 315 kV. The various sectors involved included heavy machinery, mechanical, electricity. (on-going; 2001-2005)
- Baie James - Eastmain 1 Hydropower development, James Bay, Quebec - A power generating station with three 160 MW Francis turbines under 63 m of head - main dam (rockfill) and 31 dykes: total fill volume 10 500 000 m3. Spillway capacity: 7,225 m3/s, concrete sill with four 12,2 m wide gates and a cascade outlet canal. Diversion tunnel : 343 m long excavated in the rock on the left bank (14 x 18.4 m) (1991 – to date).
- James Bay - LG-4 Powerhouse, addition of RPTC automatic operation. Detailed engineering for the RPTC automatic operation (2,650 MW). The automatic operation is distributed, and consists of several programmable logics automatons installed in the main stations and substations, and linked to each other through a telecommunications system (May 1996 to June 1999)
- James Bay - Caniapiscau reservoir/ Laforge rerouting. The Caniapiscau project consisted of rerouting the Caniapiscau river tothe La Grande river, where the LG-2, LG-3 and LG-4 power stations are located. The water ratios from the Caniapiscau reservoir (776 m3/s average annually) ensures 35% of the energy production of the Complexe La Grande, phase I (over 10,000 MW total). Dessau provided various services such as: prefeasibility studies, planning, control and interpretation of geophysical and geotechnical exploration for the foundations and construction materials; engineering, design and technical specifications, participation in the supplier selection process and in the construction work supervision and equipment installation (1974-83)
Production - Nuclear Power
- Gentilly 2 – Environmental qualification of critical safety equipment. Definition of objectives in compliance with new standards, applicable regulations and Canadian nuclear industry standards. Preparation and implementation of procedures designed to help personnel identify equipment to be qualified and to perform environmental qualification assessment of the equipment. Implementation of a method for evaluating environmental conditions in rooms housing critical equipment. Systematic evaluation of each device and determination of requirements for maintaining their qualification. (1999-2007)
- Gentilly 2 – Access control (site security). Complete renovation of gatehouse. Construction of a lock system with motorized barriers for vehicles and full-height turnstiles for staff. Installation of radiation monitors at boundaries between authorized-access zones (including creation of a radiation-measurement station for exiting vehicles). Installation of biometric identification stations at entrances to controlled-access zones. Installation of staff census stations at various strategic points in the station’s buildings. Installation of distributed control and interconnection systems between computer systems. (1992)
- Gentilly 2 – Solid radioactive waste management facility (IGDRS) Phase 1. Complete development of a radioactive waste storage site, including a rainwater and groundwater runoff-sampling centre. Planning and design for future project phases. Modifications to the site’s perimeter security system. Submission of project to the Bureau d’audiences publiques en environnement (BAPE) for approval. (2005-2006)
- Gentilly 2 – Addition to service building, laboratory and fuelling machine maintenance area. Construction of a new chemistry laboratory. Construction of a workshop (maintenance area) for the fuelling machine. Construction of a catwalk (over the storage bay building). Seismically sound structure. 6.9 kV power supply. Radiation detection and alarm systems. Rolling bridge and trolley active drainage. HVAC and exhaust for potentially contaminated air. Fire detection and protection. (1995-1996)
- Gentilly 2 – Turbine monitoring instrumentation. Rationalization of control strategy by improving the division of subsystems. Major technological changes. Measurement redundancy. Addition of a human-machine interface (HMI). Organization of interfaces with main control room. Human-factor engineering. (2006-2008)
- Gentilly 2 – Security perimeter protection. Preparation of preliminary design (replacement of equipment, re-assessment of boundaries between detection zones, lighting system, monitoring station and wiring network). Analysis, protection and coordination of a redundant electrical power supply line to the gatehouse. Re-evaluation and modification of the grounding system for metal fences. Tests and modifications to the perimeter lighting system and relocation of the control panel. Reorganization of the network of service outlets along the perimeter. Wiring and connection of all components of the new perimeter protection system. (2004-2006)
- Gentilly 2 – Replacement of the heavy-water leak detection and monitoring system. Preliminary design and detailed engineering for two redundant analyzers that are more precise, more reliable, not sensitive to temperature fluctuations in samples, and that do not require the use of demineralised water. Coordination with several other nuclear plants through a COG (Candu Owner’s Group) project. Tests performed at the manufacturer’s site to verify precision and response time of the new analyzers. Technical support for installation and commissioning of the new system. (2006-2008)
- Gentilly 2 – Installation of booms. Preliminary design and technical specifications for system to stabilize ice fields, prevent drift ice from blocking the discharge channel and water intakes or obstructing navigation channels in order to protect the significant fish populations found there, especially during the power plant’s winter downtime. Moreover, this project became necessary to meet Canadian requirements for blocking access to unauthorized personnel. Bathymetric and topographical surveys. Assessment of hydrological conditions. (2005-2008)
- Gentilly 2 — Secondary side break logic detection. Detailed engineering for achieving a very short response time in relation to the propagation time of pressure fluctuations and the activation of closing mechanisms for anti-explosive valves. Selection of detection instruments unaffected by harsh conditions. Installation of equipment in rooms designed to withstand a design basis earthquake (DBE) event. (1999)
- Gentilly 2 — Installation of pressure relief panels. Selection of detection and control instruments for pressure relief panels. Design of 2 / 3 control circuit (steam, pressure, temperature) to prevent unwanted activation of the 124 pressure relief panels. Preparation of detailed engineering lots for structural, mechanical, electrical and instrumentation control work. (1995-1999)
- Gentilly 2 — Installation of containers for spent irradiated fuel (CANSTOR). In collaboration with Groupe Michel Pellerin, architect and Atomic Energy of Canada Ltd. – AECL (designer of the CANSTOR modules), Dessau performed project engineering. Preparation of design criteria. Site development (excavation, drainage, roads, foundations, building). Technical specifications for a gantry crane (40T). Installation and connection of machinery for hoisting lead casks. Design of utilities (electricity, lighting, grounding, communications). Connection of temperature-monitoring instruments for the first two CANSTOR modules. (1994-2004)
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