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Bruce Power Limited Partnership is a Canadian business partnership composed of several corporations. It exists as a partnership between Cameco Corporation , TransCanada Corporation , BPC Generation Infrastructure Trust , the Power Workers Union and The Society of Energy Professionals . It is the licensed operator of the Bruce Nuclear Generating Station, located on the shores of Lake Huron, roughly 250 kilometres northwest of Toronto, between the towns of Kincardine and Saugeen Shores. This is the largest operating nuclear plant in the world by output With eight units in operation, the facility supplies 6,300 megawatts of electricity to Ontario's power grid. That's nearly 30 per cent of homes, schools, hospitals and businesses in the province. Bruce Power became the world's largest operating nuclear facility in 2012, when Units 1 and 2 returned to operation after a multi-billion dollar refurbishment project. This achievement returned the site to full operating capacity for the first time in 17 years. Wikipedia.

Eme J.,McMaster University | Mueller C.A.,McMaster University | Manzon R.G.,University of Regina | Somers C.M.,University of Regina | And 4 more authors.
Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology | Year: 2015

Critical windows are periods of developmental susceptibility when the phenotype of an embryonic, juvenile or adult animal may be vulnerable to environmental fluctuations. Temperature has pervasive effects on poikilotherm physiology, and embryos are especially vulnerable to temperature shifts. To identify critical windows, we incubated whitefish embryos at control temperatures of 2°C, 5°C, or 8°C, and shifted treatments among temperatures at the end of gastrulation or organogenesis. Heart rate (fH) and oxygen consumption (V˙O2) were measured across embryonic development, and V˙O2 was measured in 1-day old hatchlings. Thermal shifts, up or down, from initial incubation temperatures caused persistent changes in fH and V˙O2 compared to control embryos measured at the same temperature (2°C, 5°C, or 8°C). Most prominently, when embryos were measured at organogenesis, shifting incubation temperature after gastrulation significantly lowered V˙O2 or fH. Incubation at 2°C or 5°C through gastrulation significantly lowered V˙O2 (42% decrease) and fH (20% decrease) at 8°C, incubation at 2°C significantly lowered V˙O2 (40% decrease) and fH (30% decrease) at 5°C, and incubation at 5°C and 8°C significantly lowered V˙O2 at 2°C (27% decrease). Through the latter half of development, V˙O2 and fH in embryos were not different from control values for thermally shifted treatments. However, in hatchlings measured at 2°C, V˙O2 was higher in groups incubated at 5°C or 8°C through organogenesis, compared to 2°C controls (43 or 65% increase, respectively). Collectively, these data suggest that embryonic development through organogenesis represents a critical window of embryonic and hatchling phenotypic plasticity. This study presents an experimental design that identified thermally sensitive periods for fish embryos. © 2014 .

Janzen V.,Chalk River Laboratories | Luloff B.,Chalk River Laboratories | Sedman K.,Bruce Power
Nuclear Engineering and Design | Year: 2015

Measurements of downcomer flow in nuclear steam generators can provide unique fitness for service and performance indicators related to overall thermalhydraulic performance, safety related secondary-side setpoints and certain forms of degradation. This paper reviews the benefits of downcomer-flow measurements to nuclear power-plant operators, and describes methods that are commonly used. It summarizes the history and state-of-the-art of the most widely used technology, non-intrusive ultrasonic systems, including field applications at several nuclear power plants. It also describes the technical challenges that remain, and summarizes recent technical developments and future improvements. © 2015 Published by Elsevier B.V.

El-Jaby A.,Royal Military College of Canada | Lewis B.J.,Royal Military College of Canada | Thompson W.T.,Royal Military College of Canada | Iglesias F.,Candesco Corporation | Ip M.,Bruce Power
Journal of Nuclear Materials | Year: 2010

A mathematical treatment has been developed to predict the release of volatile fission products from operating defective nuclear fuel elements. The fission product activity in both the fuel-to-sheath gap and primary heat transport system as a function of time can be predicted during all reactor operating conditions, including: startup, steady-state, shutdown, and bundle-shifting manoeuvres. In addition, an improved ability to predict the coolant activity of the 135Xe isotope in commercial reactors is discussed. A method is also proposed to estimate both the burnup and the amount of tramp uranium deposits in-core. The model has been validated against in-reactor experiments conducted with defective fuel elements containing natural and artificial failures at the Chalk River Laboratories. Lastly, the model has been benchmarked against a defective fuel occurrence in a commercial reactor. Crown Copyright © 2010.

Sarchami A.,Kings College | Ashgriz N.,Kings College | Kwee M.,Bruce Power
Annals of Nuclear Energy | Year: 2013

Three dimensional numerical simulation is conducted on the CANDU Moderator Test Facility (MTF). Heat generation inside the tank is modeled through surface heating. Transient variations of the temperature and velocity distributions inside the tank are determined. The results show that the flow inside the moderator tank has no symmetry plane. A high temperature zone, located on the top left corner of the tank, is identified. The inlet jets are found to flow along the walls of the tank and impinge on each other at the top of the tank. This impingement point is located more towards the right side of the tank. The temperature contours along the length of the tank have a saddle shape, with high temperatures towards the edges of the saddle. The numerical results for MTF indicate that the moderator tank operates in the buoyancy driven mode. © 2013 Elsevier Ltd. All rights reserved.

Krane J.C.,Bruce Power
Canadian Nuclear Society - 32nd Annual Conference of the Canadian Nuclear Society and 35th CNS/Can Student Conference 2011 | Year: 2011

In 2009 a new Power Reactor Operating License (PROL) was granted to Bruce Power, Canada's largest independent nuclear power generator. The PROL required the adoption of a large, multi year revision to one of the cornerstone referenced national standards, Canadian Standards Association (CSA) N285.0 and also introduced a new approach to the licensing process and structure. This paper will describe the basis of the new regulatory structure and required pressure boundary related PROL changes and will provide details of the resultant impacts, successful transition, implementation and sustainability of Bruce Power's PBQA Program.

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