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Thursday, 24 September, 2015

Chalk River Laboratories


Chalk River Laboratories (CRL) is a Canadian nuclear research facility located in Deep River, Renfrew County, Ontario, Canada, near the Village of Chalk River, about 180 kilometers (km) northwest of Ottawa. CRL is a site of major research and development to support and advance nuclear technology, in particular, Canada Deuterium Uranium (CANDU) reactor technology.

At CRL, there were existing 2.4 kilovolt (kV) overhead transmission lines as well as branch lines on Plant Road that required an upgrade. A 12.47 kV line on Plant Road also needed to be re-fed. This line had to be upgraded because of an increased demand for power due to a planned expansion. CRL was also experiencing voltage drop issues that needed to be addressed.

The existing 12.47 kV line began at Building 422 and was buried underground up to a separate parking lot. The feeder was brought up from the ground at pole labeled P-1 and followed Plant Road to Waste Management Area 'G'. This overhead line was connected to numerous fuse cut-outs, transformers, lighting arrestors, and branch lines. The grounding of the poles along the line was not consistently spaced or sized.

The 12.47 kV line on Plant Road was fed by the Village of Chalk River between Plant Road Poles P-125 through P-46. This section of line was rebuilt in 2008/2009. This line also needed to be re-fed due to the planned expansion. The design-build general contractor was responsible for the design, supply, and the building and commissioning of this 12.47/13.8 kV distribution system. O’C&L was retained to advise on an on-going dispute that arose between Atomic Energy of Canada and the design-build general contractor.

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